Certified Laser Safety Glasses

Overview
Frame Styles
Specs Tutorial
Laser Safety
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Features

Absorptive Dye Encased in Hardened Polycarbonate Lenses (Resistant to Breaking)*
Surface Scratches Do Not Reduce the Optical Density of the Lenses
Protection Lasts for a Minimum of 10 seconds at Maximum EN 207 Rated Exposure (See Specs Tutorial Tab)
Laser Glasses Available in Multiple Frame Styles
Compliant with ANSI Z136 Standards
All Models Except LG14(A)(B)(C) are CE Certified for EN 207 Standards (See Specs Tutorial Tab)
LG13(A)(B)(C) and LG14(A)(B)(C) Laser Glasses are CE Certified for EN 208 Laser Alignment Standards (See Specs Tutorial Tab)

These Laser Safety Glasses provide ANSI Z136 compliant and CE certified laser radiation protection. The lenses are made from absorptive dye encapsulated in hardened polycarbonate*, which provides superior resistance to breaking and prevents minor scratches from affecting laser protection. The optical density (OD) and LB-Rating for specific wavelength ranges are indelibly printed on the lens or frame for permanent identification without blocking the field of view. For a complete list of optical densities and LB-Ratings, please click on the item #'s corresponding row in the selection guide to the right. Each pair of laser safety glasses comes with a protective storage case, a slip-on neck strap, and a cleaning cloth. Please note that the modern goggle style does not come with a slip-on neck strap.

Thorlabs offers laser safety glasses in up to four different frame styles (see the Frame Styles tab for details). The universal style frame* can be worn over prescription glasses and features side and top shield protection from peripheral laser radiation. The comfort style frame features detachable inserts for prescription lenses (please consult your doctor to fit lenses for the inserts) and an extended nose piece that may be more comfortable for users who have a low nose bridge. The sport style frame is designed to wrap around the user's face, providing full laser protection with a continuous field of view. Finally, the modern goggle style comes with detachable inserts for prescription lenses, and an adjustable strap, making it the most secure of the frame styles.

Care Instructions
When not being used, the laser safety glasses should be stored in their protective case and in an area where the temperature does not exceed 80 °F (26.6 °C). The laser safety glasses can be cleaned using a dilution of isopropyl alcohol (<10%) and wiped with a cotton swab. The cleaning cloth included with each pair of laser safety glasses can be used for removing dust from the surface of the lens. These lenses may also be cleaned with an ultrasonic cleaner or dish soap and water; the laser safety rating will not be affected by either cleaning procedure.

Picking the Appropriate Laser Safety Glasses
Since the correct choice of laser safety eyewear depends upon many local factors that cannot be evaluated remotely, including the beam path, laser parameters, and lab environment, Thorlabs cannot recommend specific eyewear for your application. We would recommend discussing your needs with your organization's laser safety officer.

OD to % Transmittance Conversions

OD	Transmittance	OD	Transmittance
0.0	100%	5.0	0.001%
1.0	10%	6.0	0.0001%
2.0	1%	7.0	0.00001%
3.0	0.1%	8.0	0.000001%
4.0	0.01%	9.0	0.0000001%

OD = Optical Density
T = Transmittance (decimal)

*Please note that LG11(A) Laser Glasses use a Schott glass substrate and may not fit over prescription glasses due to the different design. To ensure CE compliance, only the universal and comfort style goggles are offered with this substrate.

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Modern Goggle Style

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Sport Style

Click for Details
Comfort Style

Click to Enlarge
Universal Style

LG1 Universal Style Laser Glasses on 1 x 1 cm Grid for Measuring Interior Dimensions

Click to Enlarge
Each pair of glasses and goggles comes with a protective carrying case.

Universal Style
Universal Style laser safety glasses feature a large (145 mm x 53 mm) frame that can be worn comfortably on top of prescription glasses. They are equipped with lensed side shields and solid top shields to protect the user's eyes from laser radiation while maintaining peripheral vision. The frame has adjustable arm lengths to accomodate different temple sizes. Laser safety ratings are indelibly printed on the lenses to indicate the level of protection provided for specific wavelength ranges.

The LG11 is composed of a Schott Glass substrate, and uses a different frame than other universal style laser glasses that features side shields made from solid plastic providing full laser protection but at the expense of peripheral vision. These laser glasses may not fit over prescription glasses. Laser ratings on the LG11 are indelibly printed on the left side shield, not on the lenses.

Comfort Style
Comfort Style glasses feature a medium (145 mm x 47 mm) frame with solid side shields for full protection from peripheral laser radiation. While these laser safety glasses cannot be worn over prescription glasses, each pair includes a detachable insert for prescription lenses (seen by clicking on the the image to the right). Contact your doctor to fit lenses for the inserts. These frames are equipped with an extended nosepiece that allows the glasses to sit more comfortably on the noses of users who have a low nose bridge. Laser safety ratings are indelibly printed on the lenses (LG11A laser ratings are printed on the frame) to indicate the level of protection provided for specific wavelength ranges.

Sport Style
The Sport Style glasses have a compact (134 mm x 48 mm) frame designed for full laser safety coverage without the need for side shields and provide the user with a wide field of view. Glasses with this frame style have arms that feature adjustable lengths and an adjustable joint (seen by clicking on the image to the right) to customize the fit for different head shapes and sizes. These sport style glasses cannot be worn over prescription glasses and do not include inserts for prescription lenses. Laser safety ratings are indelibly printed on the lenses to indicate the level of protection provided for specific wavelength ranges.

Modern Goggle Style
The Modern Goggle Style features an adjustable strap, a gasket to create a seal around the eyes, as well as vents to prevent fogging. The interior dimensions of these laser goggles are
133 mm x 51 mm. The lenses have a diagonal length of 66 mm. Laser Safety Goggles are equipped with detachable inserts for prescription lenses (please consult your doctor to fit prescription lenses for the insert). Laser safety ratings are indelibly printed on the lenses to indicate the level of protection provided for specific wavelength ranges.

*** This guide is not intended as a substitute for reading and understanding the ANSI Z136 or EN 207 or EN 208 Laser Safety Standards. It is only meant to provide an introductory overview to understanding the markings on the lenses of the LG series of laser glasses. ***

ANSI Z136 and EN 207 Standards

Indelibly printed on the laser safety glasses are two sets of numbers: Optical Density (OD) and LB-Rating, which are both used to indicate the level of protection provided for specific wavelength ranges. The OD numbers indelibly printed on the laser safety glasses can be used to determine if the glasses meet the ANSI Z136 standards of laser safety protection for a given laser product. In addition, the OD can be used to calculate the transmission (T) of light through the laser safety glasses.

Optical Density Equation

The European EN 207 standard for laser safety glasses requires that the protective eyewear be labeled with the CE mark and that the LB-Rating specifications are indelibly printed on the lens. In addition, the lenses and frames must be able to provide the stated level of protection for 10 seconds or 100 pulses depending on the mode of the laser. The LB-Rating is composed of 3 components: a wavelength range, a laser mode designation, and a scale number. The wavelength range engraved on the laser safety glasses is given in nm and is extremely important since the level of protection provided by the laser safety glasses is wavelength dependent. The laser mode designation is based on the duration of laser pulse emitted by the laser.

Laser Mode Designation

Laser Mode	Engraved Symbol	Pulse Duration
Continuous Wave (CW)	D	>0.25 s
Pulsed Mode	I	>1 µs - 0.25 s
Giant Pulsed Mode	R	1 ns - 1 µs
Mode Locked	M	< 1ns
Please refer to the official EN 207 standard that can be purchased from BSI.

The scale number (LBn) is intended to be used in conjunction with the wavelength range and the laser mode designation in order to determine if the laser safety glasses meets the minimum required level of protection for a given laser; see the table below. If one component of the LB-Rating is shared, a plus sign is used to separate multiple wavelength ranges or laser modes and scale numbers in order to save space. In addition, a greater than, >, sign preceding a wavelength range indicates that the mode and scale number ratings for that wavelength range are valid for wavelengths of light greater than the bottom number in the range up to and including the top number in the range. For example, if the glasses were rated as 330-370 D LB2 and >370-500 D LB3 then at 370 nm the rating would be D LB2 and for all wavelengths greater than 370 nm up to and including 500 nm would be rated at D LB3.

European Norm for the Selection of Laser Safety Glasses

Wavelength Range	Laser Mode	Maximum Power Density (P) or Maximum Energy Density (E)	Minimum Scale Number (LBn)
180 - 315 nm	D	1x10^n-3 W/m² (1x10^n-7 W/cm²)	log₁₀(P)+3
	I and R	3x10ⁿ⁺¹ J/m² (3x10^n-3 J/cm²)	log₁₀(E/3)-1
	M	3x10ⁿ⁺¹⁰ W/m² (3x10ⁿ⁺⁶ W/cm²)	log₁₀(P)-10
>315 - 1400 nm	D	1x10ⁿ⁺¹ W/m² (1x10^n-3 W/cm²)	log₁₀(P)-1
	I and R	5x10^n-3 J/m² (5x10^n-7 J/cm²)	log₁₀(E/5)+3
	M	1.5x10^n-4 J/m² (1.5x10^n-8 J/cm²)	log₁₀(E/1.5)+4
>1400 - 1000000 nm	D	1x10ⁿ⁺³ W/m² (1x10^n-1 W/cm²)	log₁₀(P)-3
	I and R	1x10ⁿ⁺² J/m² (1x10^n-2 J/cm²)	log₁₀(E)-2
	M	1x10ⁿ⁺¹¹ W/m² (1x10ⁿ⁺⁷ W/cm²)	log₁₀(P)-11
Please refer to the official EN 207 standard that can be purchased from BSI.

There are two ways to use the table above: start with the scale number and calculate the maximum safe power density or start with a power density and calculate the minimum safe scale number. This is demonstrated by the two examples below.

Example 1: The LG3 laser safety glasses have an LB-Rating line that reads "180-315 D LB7 + IR LB4". So if the LG3 glasses are being used with a 10 µs pulsed 280 nm light source the table above can be referenced to find that, E=3x10ⁿ⁺¹ J/m², where in this example the scale number is LB4 so n=4. As a result, when the LG3 laser safety glasses are being used in this situation the maximum power density of the light source should not exceed 3x10⁵ J/m².

Example2: A CW Krypton Ion laser lasing at 647.1 nm has a maximum power density of 2.2x10⁴ W/m². Using the table above, the scale number can be calculated using LBn=log₁₀(P)-1, which results in a rounded up scale number of 4. The LG4 laser safety glasses meet the safety specifications of the European EN 207 standard for this example.

Alignment Rating (EN 208)

The LG13(A)(B) and LG14(A)(B) glasses are rated for laser alignment applications. This rating allows the lens to transmit a portion of the light for alignment purposes, while attenuating the light to eye-safe power levels in the event of accidental direct exposure to a beam. The rating is given as RB# where # is replaced by the minimum optical density at the specified wavelength or wavelength range (in nm). Along with this RB value is the maximum allowable power and energy of the laser over a Ø7 mm aperture. Power is given for pulses greater than 0.2 ms, while energy is specified for pulses from 1 ns to 0.2 ms. When using a pulsed laser, a correction factor of N1/4 must be multiplied by the maximum energy rating, replacing N with the number of pulses the laser produces in a 10 s interval.

Example: The LG14 laser safety glasses have an alignment rating of 1 W 2 x 10^-4 J 532 RB3. At 532 nm, the glasses will have an optical density between 3 and 4, correlating to transmission between 0.1% and 0.01%. The maximum power/energy over a Ø7 mm aperture that these glasses can be used with at 532 nm is 1 W for CW or pulses greater than 0.2 ms, and 2 x 10^-4 J for pulses from 1 ns to 0.2 ms.

Please refer to the official EN 208 standard that can be purchased from BSI.

dBm to mW Power Conversions

dBm	mW	dBm	mW
0.0	1.0000	10.0	10.0000
2.0	1.5849	20.0	100.0000
4.0	2.5119	30.0	1,000.0000 (1 W)
6.0	3.9811	40.0	10,000.0000 (10 W)
8.0	6.3096	50.0	100,000.0000 (100 W)

P(mW) = Power in mW

Light Exiting a Fiber

NA	Divergence Half Angle, Θ	Beam Area @ 25.4 mm (1") From Fiber
0.10	5.7°	20 mm²
0.15	8.6°	46 mm²
0.20	11.5°	83 mm²
0.25	14.4°	133 mm²
0.30	17.4°	199 mm²
0.35	20.4°	280 mm²
0.40	23.5°	383 mm²
0.45	26.7°	512 mm²
0.50	30.0°	675 mm²

Note: The values in this table are rounded down to provide conservative beam areas.

When working with fiber optics, light emitted directly from the endface of a fiber is diverging. Thus, the power density is decreasing as the beam spreads and the danger of damage to the eye decreases. The table to the left lists the beam area created by light exiting a fiber for fibers with numerical apertures (NA) between 0.10 and 0.50. If you know the total power emitted from the fiber, you can calculate the power density at 25.4 mm (1") from the fiber tip. This power density will allow you to determine the safe fiber-tip viewing distances.

Fiber Divergence

Laser Safety and Classification

Safe practices and proper usage of safety equipment should be taken into consideration when operating lasers. The eye is susceptible to injury, even from very low levels of laser light. Thorlabs offers a range of laser safety accessories that can be used to reduce the risk of accidents or injuries. Laser emission in the visible and near infrared spectral ranges has the greatest potential for retinal injury, as the cornea and lens are transparent to those wavelengths, and the lens can focus the laser energy onto the retina.

Safe Practices and Light Safety Accessories

Thorlabs recommends the use of safety eyewear whenever working with laser beams with non-negligible powers (i.e., > Class 1) since metallic tools such as screwdrivers can accidentally redirect a beam.
Laser goggles designed for specific wavelengths should be clearly available near laser setups to protect the wearer from unintentional laser reflections.
Goggles are marked with the wavelength range over which protection is afforded and the minimum optical density within that range.
Laser Safety Curtains and Laser Safety Fabric shield other parts of the lab from high energy lasers.
Blackout Materials can prevent direct or reflected light from leaving the experimental setup area.
Thorlabs' Enclosure Systems can be used to contain optical setups to isolate or minimize laser hazards.
A fiber-pigtailed laser should always be turned off before connecting it to or disconnecting it from another fiber, especially when the laser is at power levels above 10 mW.
All beams should be terminated at the edge of the table, and laboratory doors should be closed whenever a laser is in use.
Do not place laser beams at eye level.
Carry out experiments on an optical table such that all laser beams travel horizontally.
Remove unnecessary reflective items such as reflective jewelry (e.g., rings, watches, etc.) while working near the beam path.
Be aware that lenses and other optical devices may reflect a portion of the incident beam from the front or rear surface.
Operate a laser at the minimum power necessary for any operation.
If possible, reduce the output power of a laser during alignment procedures.
Use beam shutters and filters to reduce the beam power.
Post appropriate warning signs or labels near laser setups or rooms.
Use a laser sign with a lightbox if operating Class 3R or 4 lasers (i.e., lasers requiring the use of a safety interlock).
Do not use Laser Viewing Cards in place of a proper Beam Trap.

Laser Classification

Lasers are categorized into different classes according to their ability to cause eye and other damage. The International Electrotechnical Commission (IEC) is a global organization that prepares and publishes international standards for all electrical, electronic, and related technologies. The IEC document 60825-1 outlines the safety of laser products. A description of each class of laser is given below:

Class	Description	Warning Label
1	This class of laser is safe under all conditions of normal use, including use with optical instruments for intrabeam viewing. Lasers in this class do not emit radiation at levels that may cause injury during normal operation, and therefore the maximum permissible exposure (MPE) cannot be exceeded. Class 1 lasers can also include enclosed, high-power lasers where exposure to the radiation is not possible without opening or shutting down the laser.
1M	Class 1M lasers are safe except when used in conjunction with optical components such as telescopes and microscopes. Lasers belonging to this class emit large-diameter or divergent beams, and the MPE cannot normally be exceeded unless focusing or imaging optics are used to narrow the beam. However, if the beam is refocused, the hazard may be increased and the class may be changed accordingly.
2	Class 2 lasers, which are limited to 1 mW of visible continuous-wave radiation, are safe because the blink reflex will limit the exposure in the eye to 0.25 seconds. This category only applies to visible radiation (400 - 700 nm).
2M	Because of the blink reflex, this class of laser is classified as safe as long as the beam is not viewed through optical instruments. This laser class also applies to larger-diameter or diverging laser beams.
3R	Lasers in this class are considered safe as long as they are handled with restricted beam viewing. The MPE can be exceeded with this class of laser, however, this presents a low risk level to injury. Visible, continuous-wave lasers are limited to 5 mW of output power in this class.
3B	Class 3B lasers are hazardous to the eye if exposed directly. However, diffuse reflections are not harmful. Safe handling of devices in this class includes wearing protective eyewear where direct viewing of the laser beam may occur. In addition, laser safety signs lightboxes should be used with lasers that require a safety interlock so that the laser cannot be used without the safety light turning on. Class-3B lasers must be equipped with a key switch and a safety interlock.
4	This class of laser may cause damage to the skin, and also to the eye, even from the viewing of diffuse reflections. These hazards may also apply to indirect or non-specular reflections of the beam, even from apparently matte surfaces. Great care must be taken when handling these lasers. They also represent a fire risk, because they may ignite combustible material. Class 4 lasers must be equipped with a key switch and a safety interlock.
All class 2 lasers (and higher) must display, in addition to the corresponding sign above, this triangular warning sign

Posted Comments:

Joan Martí González (posted 2019-11-19 08:53:16.45)

Hello, My question is about if these model, LG16C, is suitable for working with a 40 W Class IV CO2 Laser engraver, which wavelength is 10640 nm. I supose it is, but in the specifications it only says that the OD 6+ is until 10600 nm, and does not specify anything for greater wavelengths. Thank you very much.

YLohia (posted 2019-12-09 10:30:24.0)

Hello Joan, thank you for contacting Thorlabs. May I ask if there is any particular reason for not considering the LG6C glass instead? It has OD 7+ from 9,000 to 11,000 nm. I had reached out to you directly to discuss this further but did not hear back.

Ethan He (posted 2019-05-21 10:58:18.23)

Hi, we need glasses to have these specifications: Optical density: 512-532nm OD>=9 security value: 515-532nm D LB8 + IR LB9 + M LB9Y Daylight transmittance:20% Filter color: Orange Glas-filter(coated) Do you have these kind of glasses? Thanks!

YLohia (posted 2019-05-21 09:18:00.0)

Hello, thank you for contacting Thorlabs. Unfortunately, we do not offer anything at the moment that matches these specs exactly. The closest option from our catalog would be the LG12.

Fabrizio Orlando (posted 2019-05-20 08:25:34.717)

Hello, I am looking for laser safety glasses for the following lasers: (1) 635 nm, 5 mW, CW, beam diameter: 0.9 mm (2) 1152 nm, 5 mW, CW, beam diameter: 0.9 mm (3) 3392 nm, 5 mW, CW, beam diameter: 1.55 mm According to your specs tutorial, I would need a LB1 for the 635 nm and 1152 nm lasers, and a LB3 for the 3392 nm laser. Could you please advise on that? Which laser safety glass(es) models would be appropriate? Thanks, Fabrizio

YLohia (posted 2019-05-20 10:57:51.0)

Hello, we recommend selecting the highest possible optical density (OD) for the wavelengths you need to block. Your current selections offer minimal OD at your operating wavelengths. (1) 635 nm: LG4 (OD 4+) (2) 1152 nm: LG11 (OD 7+) (3) 3392 nm: LG11 (OD 5+) Please confirm all selections with your local laser safety officer before purchase.

alex.jones (posted 2019-01-11 11:40:32.467)

I have an Insight X3 with frequency doubler, which cover 340-650 and 680-1300 nm. Could you please advise about suitable laser safety specs? Thanks, Alex

YLohia (posted 2019-01-11 04:11:48.0)

Hello Alex, thank you for contacting Thorlabs. For a single item, the LG1 offers the highest optical density for all of the wavelengths in your two ranges. Please note that the OD in the 680-800nm range is relatively low. I will reach out to you directly to discuss this further.

albert.romann (posted 2018-08-29 08:13:06.707)

Hi there Do you sell detachable inserts for prescription lenses separately? (comfort style frame) Cheers, Albert

llamb (posted 2018-08-31 03:04:10.0)

Hi Albert, thank you for contacting Thorlabs. For future reference, please contact techsupport@thorlabs.com for quotes on custom/special products. We can indeed offer these detachable inserts as non-standard items. We will reach out to you by email to discuss a custom quote.

rezaya (posted 2018-04-02 10:43:42.97)

Hi, I'd be using "Nano S 30-30 PIV" laser with these specifications: Wavelength: 532 nm Energy per pulse: 30 mJ Pulse width: 8 ns Pulse repetition frequency: 0-30 Hz Based on an online calculator that used the min OD required is 5.59. Could you please help me know which other parameters should I consider for choosing the right goggles? Suggestions in choosing the goggles would be greatly appreciated. Best, Reza

llamb (posted 2018-04-03 03:45:17.0)

Hello Reza, thank you for contacting Thorlabs. Our LG3-, LG10-, or LG12- series glasses offer an Optical Density >7 at 532 nm, though I would recommend discussing your needs with your local laser safety officer to be safest. I will reach out to you directly as well.

kz (posted 2018-03-27 10:28:09.523)

Hello: I am building a laser system with IR 1064 nm laser, 20W output, pulsed, with pulse length about 33 ns, 0.7mJ maximum energy in one pulse. I estimated that LG1 goggles are the correct ones to use with this type of laser. Could you, please, confirm it for me? Thank you in advance for your help! Kirill

llamb (posted 2018-03-30 04:09:10.0)

Hello Kirill, thank you for contacting Thorlabs. I recommend discussing your safety glasses selection with your local laser safety officer who can most effectively evaluate your laser specs. Our LG1 glasses have an Optical Density >7 at 1064 nm and are among our cheaper options for laser safety glasses. I will reach out to you directly as well.

panagiotis.bilalis (posted 2017-10-25 23:57:19.68)

Hello, I need laser safety glasses for 632.8 nm light with OD=2. Could you please help me to pick the right ones? Thanks in advance!

tfrisch (posted 2017-10-30 11:29:50.0)

Hello, thank you for contacting Thorlabs. For liability reasons, please verify all laser goggle selections with your local laser safety office who would have access to the complete specs of your laser. LG4 and LG7 series each have an OD >2 at 632.8nm, so I will reach out to you directly to discuss them.

felix.hofmann (posted 2017-09-19 09:16:04.263)

Hi, I need laser safety glasses that give LB6 at both 532 nm and 560 nm. I don't seem to be able to find anything with suitable specification on your website. Can you help? Thanks, Felix

tfrisch (posted 2017-09-26 05:09:17.0)

Hello, thank you for contacting Thorlabs. I will reach out to you directly about your custom needs.

maws (posted 2017-07-31 11:29:16.427)

Our lab. owns a confocal microscope which is equipped with the following lasers: Class 3B: a)diode solid state 405 nm b)argon (458 nm, 488 nm, 514 nm) c)DPSS 561 nm d)helium neon 633 nm Class 4: coherent ultra 2 Ti: Sapphire 680-1080 nm Please advise which laser protective eyewear models will be appropriate for the above laser protection. Thanks for your kind help. Victor Ma Medical Technologist

tfrisch (posted 2017-08-16 10:27:07.0)

Hello, thank you for contacting Thorlabs. We will reach out to you with some recommendations for laser safety goggles from your various lasers, but it is always best to check with your local laser safety officer before making a final decision.

robert.kakonyi (posted 2017-05-02 14:28:23.893)

Dear Support, Just a note/improvement proposal: Do you have a selection tool for Laser Safety Glasses? I mean I set the desired wavelength and laser parameters, and the page orders them in OD number, pass/fail criterion. Prio: low. Thanks, Róbert

tfrisch (posted 2017-05-02 12:58:07.0)

Hello, thank you for contacting Thorlabs. It is necessary to confirm that laser safety goggles meet the requirements of your laser safety officer on site. If you need help understanding the ANSI Z136, EN 207, or EN208 standards on the Specs Tutorial tab, our Tech Support team would be able to discuss those with you. I will reach out to you directly about this application.

randy.hurd (posted 2017-04-13 18:28:23.227)

I have a pair that has formed a crack running from the frame at the top of the lens into the lens rendering them unusable. Is this a warranty issue?

tfrisch (posted 2017-04-27 04:48:19.0)

Hello, thank you for contacting Thorlabs. I will reach out to you directly about the damage to these goggles.

eric.washburn (posted 2017-02-15 08:46:11.79)

I need glasses that will be appropriate for use with both Ti:sapphire and Insight lasers with wavelengths of 680-1300 nm. thanks eric

tfrisch (posted 2017-02-16 03:24:48.0)

Hello, thank you for contacting Thorlabs. I will reach out to you directly about your laser specs.

cpepe (posted 2016-11-28 05:55:25.953)

Hello, I need laser safety glasses for 532 nm light. I have looked at LG12 and LG3 that both have OD = 7+. However I want to make sure I understood your L-rating correctly: LG12 has LB5 and LG3 has LB6 for 532 nm continous (D) light. Therefore is it correct that I can use a max laser powerdensity of 10^6 W/m^2 with LG12 and 10^7 W/m^2 with LG3? Thanks in advance!

tfrisch (posted 2016-11-30 10:40:56.0)

Hello, thank you for contacting Thorlabs. I will contact you directly to discuss the specs you have listed above. You should also have the purchase of laser safety goggles approved by your laser safety officer to be sure they comply with all policies for your lab.

kedves (posted 2016-11-11 15:01:23.68)

Dear Thorlabs, we need safety glasses for Ti:Sapphire amplifier alignment. We would need about OD 3-4 around 532 nm for attenuating the pump beam and OD>7 above 750 nm to block the fs pulses. It would be similar to LG12 with the difference that the OD is lower around 532 nm. I have not found such a product in your list; can you offer this version too? Thanks

tfrisch (posted 2016-11-11 04:27:36.0)

Hello, thank you for contacting Thorlabs. I will reach out to you directly about the needs for your application.

cpepe (posted 2016-11-11 06:18:19.993)

Hi, I was wondering what is your definition (in wavelenght) of visible when it says 59% visible light transmission at what wavelenght is this?

tfrisch (posted 2016-11-16 08:47:19.0)

Hello, thank you for contacting Thorlabs. The function that defines the visible light transmission is weighted by the sensitivity of the human eye which is governed by ANSI and EU standards. I have emailed you directly.

dokumentydokumenty (posted 2016-06-22 22:59:40.323)

Hello And against INFRARED ?Please....?You have something against infrared? Thank you Adam

besembeson (posted 2016-06-23 03:45:22.0)

Response from Bweh at Thorlabs USA: Yes we do offer several laser safety glasses for infrared wavelengths as can be found here: http://www.thorlabs.com/NewGroupPage9.cfm?ObjectGroup_ID=762

cbrideau (posted 2016-04-21 20:16:28.42)

Just want to add my voice to all the people asking for LG11 in a proper universal style frame. It has the best visible light transmission for working with NIR lasers. It is very disappointing that it is not available in a style that works over regular glasses. Please pressure your supplier to offer this in a better form factor for folks with prescription glasses!

besembeson (posted 2016-04-22 08:36:10.0)

Response from Bweh at Thorlabs USA: The LG11 has a different frame style because at this time, it is difficult to cut the glass that is used to the shapes that fit the universal frames. However, according to our tests, these actually fit over most prescription glasses, but it is not as comfortable as the other universal frames that we have. We will look into improving the frame design to be more in line with the standard universal frames.

sebastian.jaeger (posted 2015-09-23 12:14:20.73)

Dear Sir or Madame, I'm confused regarding the CE certification of your laser safety glasses. You are using the incorrect CE symbol on your webpage leading towards that I'm not allowed to buy your laser safety glasses. The symbol you use here is commonly referred to as "chinese export" and is usually used on very cheap and unsafe products. If your glasses are really CE certified, please use the correct symbol. Kind regards, Sebastian Jäger

myanakas (posted 2015-09-23 04:16:36.0)

Response from Mike at Thorlabs: Thank you for your feedback. This has been corrected and we apologize for any inconvenience that this may have caused. Our laser glasses are CE certified and the certification can be found by clicking on the red “Docs” icon next to the item numbers.

ylai (posted 2014-12-11 20:51:47.003)

Dear Thorlabs, I am a graduate student in Caltech. Our group would like to purchase your LG11 product. However, do you have universal style frame for this product? Could you customize that? It would be very convenient for our group to use these goggles. Best, Yu-Hung Lai Applied Physics California Institute of Technology

jlow (posted 2014-12-18 03:58:49.0)

Response from Jeremy at Thorlabs: The LG11 lens is more difficult to cut than the other ones and they are not available in the universal style. We can provide other styles which might work for you. I will contact you directly to discuss about this further

makarov (posted 2014-09-18 18:18:31.71)

LG11, unlike all other Thorlabs glass models, have a different and very bad frame design. They do NOT fit over male-sized prescription glasses (despite beind advertised to do so!) and they fall off my head every time I move around. The hooks are plastic and cannot be bent to grip my ears better. The frame design of other Thorlabs glasses does not have such problems; as far as I can tell LG11 is the only different frame model.

myanakas (posted 2014-09-30 11:16:05.0)

Response from Mike at Thorlabs: Thank you for your feedback. We apologize for the inconvenience that this discrepancy in frame styles has caused. Based on your feedback we have updated the web and spec sheets for the LG11 safety glassed to reflect that they do not work with prescription glasses.

blanch (posted 2014-08-12 15:32:35.537)

We are interested in blocking both UV and IR light over 800 nm. We use a setup with 8 strong halogen lights (generally Paulmann, 35 W and 12V at 2900 K color temperature or also IR halogen lights). In terms of spectral filtering LG2 seems to do the job but could it be that the visibility is too reduced? Normally we work on a dark room with a setup where 6 to 8 halogen lights are placed on a small frame. We need to see enough to manipulate the samples under the lights and look at a computer screen. Would the LG2(19%VLT) be suitable for the task or would you rather advice the LG11 (75%VLT) or another type? Thanks in advance for your time, Carolina

jlow (posted 2014-08-13 08:52:35.0)

Response from Jeremy at Tholrabs: We will contact you directly to discuss more about your application and suggest appropriate goggles.

necmettinkenar (posted 2014-06-23 12:38:44.34)

Dear Sir/Lady We have recently purchased laser Safety Glasses (LG-10) with Invoice Number : 1793305 Sales Order: TS1187311 We are to get the products purchased, we need CE sertification sheet of LG10 - Laser Safety Glasses for customs office. In case we havent give the requested document to our Customs office we wouldnt get the safaty glasses, Thank you for your kind support, Best Regards,

myanakas (posted 2014-07-07 10:31:44.0)

Response from Mike at Thorlabs: Thank you for your feedback. We are currently getting this information together and added to our website in the next couple of days. I have emailed you directly with the LG10 CE certificate.

user (posted 2014-02-27 21:54:42.847)

Dear Thorlabs, we are using yellow lasers for optogenetics in our lab. You don't seem to have goggles in your catalog which protect against yellow light (590 nm). Currently we just use the blue goggles as a better-than-nothing solution, but it would be great to get a model with yellow absorption. Best, Michael

jlow (posted 2014-02-27 04:25:44.0)

Response from Jeremy at Thorlabs: We will look into carrying this as a regular stock item. We can offer this as a custom now. Since you did not leave your contact info, can you e-mail techsupport@thorlabs.com to request a quote please?

artetampo (posted 2014-01-22 12:00:30.133)

Buenos dias tengo un laser de fibra que tiene clase 4 invisible radiacion, longitud de onda de 1040-1200 nm, y clase 3R laser visible de longitud de onda de 630-670 nm, quisiera saber que referencia de gafas necesitaria para este laser. gracias ATTE. Javier Tovar

jlow (posted 2014-01-22 02:30:39.0)

Response from Jeremy at Thorlabs: The selection of laser safety goggles should also take into account the diameter of your laser and the operating mode. We will contact you directly to find out more about the specifications of your laser and suggest something appropriate.

cpinyan (posted 2013-11-06 16:08:06.487)

Make interactive graph function so we can chosse start and end wavelength and select different combination of goggles - would let user confirm they have covered a particular range. And - a grid showing OD of each goggle for certain common laser lines - would make selction faster than scrolling back and forth among the charts (or downloading the graphs). Ex 370, 488, 532, 633, 780, 980, 1064, 10.6um

sharrell (posted 2013-11-12 07:52:22.0)

Response from Sean at Thorlabs: Thank you for your feedback on our website. The website team has discussed the possibility of making "interactive graphs" as you suggest. In the meantime, we offer downloadable data in Excel format for many of our products, including our laser safety glasses. The data may be found at the bottom of the "OD Specs" column of the tables above each ordering area below. For your second comment, we had a graphical chart in our most recent catalog that I believe would aid in the selection process. I will get this added to the website this week and send you a pdf of this via email.

user (posted 2013-07-03 09:50:14.423)

How can i clean the lenses of LG10 safety glasses?

cdaly (posted 2013-07-03 10:20:00.0)

Response from Chris at Thorlabs: Thank you for using our feedback tool. The laser safety glasses can be cleaned using 91% isopropyl alcohol and wiped with a cotton swab.

junghyup (posted 2013-03-13 18:20:54.85)

what is the width of these laser safety glasses? And what glasses do I need to choose for my 561 nm green laser?

tcohen (posted 2013-03-14 13:20:00.0)

Response from Tim at Thorlabs: The dimensions for each laser safety glasses can be found in the spec sheet. The interior is 145mm x 53mm and have a 140mm temple. The diagonal of the lenses is 68mm. In most cases, we would chose based on the description I provided earlier in the feedback tab and using our “Specs Tutorial” tab. However, in your case the wavelength falls outside our specified ranges. We can supply some custom glasses and will need to discuss your laser output to provide a solution.

heather.duschl (posted 2013-02-01 13:20:32.32)

My lab is looking for a laser safety goggle solution for a super-continuum laser. Would it be possible to get custom glasses that block all light above a wavelength of 400nm?

jlow (posted 2013-02-06 16:36:00.0)

Response from Jeremy at Thorlabs: We do not have any safety goggles that block all the visible light. I will get in contact with you directly to discuss about this further.

tcohen (posted 2013-01-10 10:28:00.0)

Response from Tim at Thorlabs: Thank you for contacting us. You can determine appropriate safety goggles through the European EN 207 standard. Determine the power density, wavelength and mode you will be working with. Assuming you are working with a 2mm beam diameter at 100mW, 473nm and 593nm, both CW, these fall under the same calculation class. Please see the “Specs Tutorial” for a description of this calculation. Assuming the parameters above, you would be looking for a minimum L rating of D(CW laser) LB4 for both 473nm and 593nm. Since these wavelengths fall right in the middle of visible, it may be more appropriate to choose two goggles to keep your visible light transmission higher if not using the sources simultaneously. Please contact us and consult with your laser safety officer if you have any questions.

mv780 (posted 2012-12-19 15:36:08.437)

Hi, I was wondering which glasses you would advice for use for 100mW 473nm DPSS and 100mW 593nm DPSS lasers? Thanks

tcohen (posted 2012-07-18 10:31:00.0)

Response from Tim at Thorlabs: Thank you for contacting us! We will need to discuss your OD requirements. I will contact you directly to determine if we can provide a custom that suits your source.

mathieu.maisonneuve (posted 2012-07-16 14:42:49.0)

Are you doing custom glasses for supercontinuum use. I got a fianium supercontinuum laser and I want to block all light after 550nm (range of laser 550 - 2500nm) ! Thanks.

sharrell (posted 2012-04-18 15:29:00.0)

Response from Sean at Thorlabs: Thank you for your feedback. I’m sorry you had a hard time reading our plot. I've sent you an Exel file with the LG6 data directly. For the LG6, there is a steep slope between 400 and 500 nm which will make the value at 455 nm difficult to determine, but from the values on the plot, it is approximately OD = 3. We recommend discussing the choice of laser safety glasses with your laser safety officer. We will be adding downloadable data files as well as easier to read plots to our website soon.

phila (posted 2012-04-18 10:38:02.0)

Could I please get a more detailed OD vs lambda plot? What is OD at 455 nm?

bdada (posted 2012-03-15 10:58:00.0)

Response from Buki at Thorlabs to utsavdeepak.dave: Thank you for participating in our feedback forum. To get more detailed information from the OD graphs, please click the "zoom" hyperlink at the bottom of the graph. The information from each graph is corroborated by the specifications table next to the graph. For your 445nm laser, we have several options that provide an OD greater than 3. For example, LG2 has an OD of 6+, while LG3 and LG10 have an OD of 7+. Please note that we provide an OD to transmission conversion table in the "Overview" section on this webpage. For a 1W laser, we highly recommend you discuss your laser safety requirements with your laser safety officer to ensure you purchase the appropriate goggles. Please contact TechSupport@thorlabs.com if you have any questions.

utsavdeepak.dave (posted 2012-03-12 10:09:16.0)

Hello, I wish to know which product would be most suited for a class 4 laser (blue, 445nm, 1W total optical output) such that its possible to view the laser safely. I suppose OD~3.3 is required at this wavelength. Are there any products that match up to this requirement? Some of the products listed on the website seem to match up but in those products, the OD curves are sloping at this wavelength and in the others where it is constant, the value is either too high or low. Hence please notify if there are glasses available with OD~3.3 or thereabouts @ 445 nm. Thank you.

anthony.marriott (posted 2012-02-13 11:56:20.0)

I need a pair of safety glasses to cover 670nm 5mW, 639 30mW and 780nm 50mW CW laser diodes if that is possible with a single pair. They would be used for viewing beam during alignment, but not directly looking at beam. mainly used to protect engineers in reflected light. I'm not sure what pair to select, the LG4 covers the range but would they cut out to much light for teh low powered diode to be visable?

bdada (posted 2012-02-02 20:16:00.0)

Response from Buki at Thorlabs: Thank you for participating in our feedback forum. The LG2, LG3, and LG10 all provide you with an OD of 6+ or better at 405nm, so it would be a matter of preference how much visible light transmission you need to ensure appropriate visibility while you wear the goggles. Please contact TechSupport@thorlabs.com if you have further questions or concerns about choosing the laser goggles best suited for your application.

murali.samiyappan (posted 2012-01-30 22:51:39.0)

I am planning to purchase goggles for blue laser 405nm wavelength & OD 6+. Which would you recommend among LG2(19%VLT), LG3(48%VLT) and LG10(35%VLT)? Would a higher VLT percentage be considered better or otherwise?

bdada (posted 2012-01-12 20:55:00.0)

Response from Buki at Thorlabs: An OD of 6+ is a transmission of 0.0001%. We have an OD to % transmission table on the web page that should help you determine how much light will be transmitted through the goggles. The LG2 goggles you referenced permit 19% visible light transmission. If you are concerned about seeing your 405nm beam during alignment, please consider one of our viewing cards like the VRC1. I have included a link to our viewing cards below. Please contact TechSupport@thorlabs.com if you have any questions.

jessie.r.weber (posted 2012-01-12 11:12:07.0)

which goggles would you recommend for 100mW (0.7mm diameter) 405nm laser alignment? would the L2 (OD of 6+ @ 405) be transmissive enough to see the beam? thank you!

bdada (posted 2011-09-21 14:52:00.0)

Response from Buki at Thorlabs: The right type of goggles would depend highly on the environmental condition (i.e. intensity of backlighting), whether you are looking straight into the beam or looking at reflections, the object from which the beam reflects. We have contacted you to discuss different options from our selection of laser goggles, but please note that you should reveiw the specifications of the goggles with your laser safety officer to determine the appropriate one for your application.

yvan.quintal (posted 2011-09-05 12:11:28.0)

Hi, I am using a Bosch Laser distance measurer model GLR 225. It is a laser class 2, Laser diode 635 nm, smaller than 1 mw. Measuring time max: 4 sec, measuring time type: smaller than 0,5 sec. Wich model of safety glasses I may buy to protect my eyes and aalso be able to see correctly the read beam(without looking in directly on it)line and having a good visibilty of the objects arounf while working? Regards, Yvan cel: 514-238-9059

jjurado (posted 2011-02-28 09:37:00.0)

Response from Javier at Thorlabs to nirmal.virdee: Thank you very much for contacting us with your request. The LG2 glasses should provide enough eye protection for your experiment. They are specified with an optical density value of 3 in the range of 820-1720 nm, which corresponds to a transmission value of 0.1%. So, at 20 dBm, or 100 mW, only a small fraction of light will be transmitted through the glasses (100 uW), which constitutes no harm for the eye. Keep in mind that this is assuming a focused or collimated laser; however, if we factor in the divergence from the tip of the fiber, the actual incident light onto the glasses will be much less.

nirmal.virdee (posted 2011-02-25 20:33:27.0)

I have a group that is working on DWDM fiber optic equipment, including EDFA amplifiers, that have output levels of about 20dBm on single mode fiber (9um core). These operate in the C-band, 1528nm - 1565nm. I need to buy safety glasses for the engineers but cannot determine which one is the right one. Can you please let me know which one is the right one and why? I was thinking LG2 but its level of protection does not seem sufficient. Maybe I am not calculating it correctly. Thanks, Nirmal.Virdee@adtran.com.

jjurado (posted 2011-02-18 09:25:00.0)

Response from Javier at Thorlabs to pillippe.rondeau: Thank you very much for submitting your feedback. The current EN 207 L ratings are still valid. We are currently in the process of re-certifying all of our laser safety glasses. Once all have been re-tested and re-certified to the LB-ratings (the test conditions changed slightly, and in some cases the current ratings will increase and the covered wavelength ranges will broaden), we will present new specifications printed on the lenses of laser glasses and and new support documentation. If you require LB-rating documentation, we may be able to provide a preliminary copy.

philippe.rondeau (posted 2011-02-17 06:17:08.0)

EN 207 standard has been modified (from june 2010)and induces new tests and marking of the laser safety glasses : could you provide informations concerning the compliance of these safety glasses with the new standard

jjurado (posted 2011-02-03 11:36:00.0)

Response from Javier at Thorlabs to ozieseniss: Thank you very much for submitting your inquiry. Actually, any of our LG series laser safety glasses would work well for eye protection in the 180-320 nm range. If you refer to the OD Specs chart, you will see that the optical density of all of the LG glasses falls in the 5 to 7 OD value in the 190 to ~400 nm range. This translates into transmission values of 0.001% to 0.00001% (you can visit the Specs Tutorial tab for more info). If 180-320 nm is the only wavelength of concern, then we would suggest using our LG6 glasses, which have an OD of 7 in the range of 190-398 nm. Please note that we stronly recommend having your lab safety technician review the specifications of these glasses before they are used in your experiment. I will contact you directly in case you have further questions.

ozieseniss (posted 2011-02-02 17:44:07.0)

Dear Thorlabs Team, Im looking for safety glasses that cover the spectrum of concern for biological safety and health in the 180-320 nm range. The UVC radiation system we are using for surface disinfection has a high irradiation intensity of 70 mW/cm² at 254 nm (in a 2 cm distance from the quartz glass plate). So, Im looking for something that actually covers the 254 nm range....what do you recommend? Thanks

Adam (posted 2010-04-28 13:45:17.0)

A response from Adam at THorlabs: We currently do not sell one set of glasses that will block 1064nm, 694nm and 532nm effectively. We can provide the LG10 glass, which will block the 1064nm and the 532nm light. To block the 694nm light, I would recommend the LG7. We may be able to offer a custom version that may cover all of your wavelengths. Please email techsupport@thorlabs.com if you are interested in a custom option. Please note that we always recommend reviewing these items with a safety officer at your company before purchasing them.

user (posted 2010-04-28 12:06:33.0)

I need protection for 1064nm, 694nm, and 532nm...what do you recommend?

Adam (posted 2010-04-13 08:58:17.0)

A response from Adam at Thorlabs to mozaffari: The glasses we currently provide that will block light at 532nm are the LG10 and LG3. The LG10 will block light from 190nm-534nm with an OD of 7+, while the LG3 will block light from 190nm-532nm with an OD of 7+.

mozaffari (posted 2010-04-13 01:56:40.0)

I need protection from 532 nm in addition to the spec, any solutuon? Thanks

klee (posted 2009-11-20 15:58:10.0)

A response from Ken at Thorlabs to marcoc: The L-rating for the LG9 is L5 for 720-1075 nm. We may be able to provide a custom goggle. Please send your requirements to techsupport@thorlabs.com so that we can work on a quotation for you.

marcoc (posted 2009-11-19 16:56:00.0)

Hi, Can you provide the ratings of LG9 for mode lock laser ? I would like to use LG3 for second and third harmonic generation (starting with 800nm, fs laser). The problem is that LG3 doesnt stop the fundamental. Would you think its possible to add a coating to reflect 750-850nm ? Can you provide custom made combination ? In this case can I send you table of glasses needed ? thanks, marco

jens (posted 2009-06-04 08:08:35.0)

A reply from Jens at Thorlabs: we can offer a custom solution for this combination. I will send you the details for that.

olsonaj (posted 2009-06-03 16:48:31.0)

Hello. I am interested in glasses that have OD 3+ at 780nm and OD 7+ at 1550nm. I didnt see any of yours listed as having those properties. Can ThorLabs combine two lenses to create such glasses?

Laurie (posted 2009-04-13 08:18:26.0)

Response from Laurie at Thorlabs to aidi: We would recommend the LG4 blue lens, which has an optical density that is >5 for both 633 nm and 780 nm light. The LG4 goggles are ANSI Z136 compliant.

aidi (posted 2009-04-08 23:11:50.0)

Could you suggest which glass is suitable for working free-space optic setup with 780nm laser diode and 633nm HeNe laser application and also comply with safety requirement? Thank you.

Tyler (posted 2009-03-17 07:22:30.0)

A response from Tyler at Thorlabs to jdonnelly: The LG1 laser glasses are not rated at 1500 nm. The LG2 laser glasses are rated with an OD of 3+ at 1500 nm. Thank you for your interest in our products.

jdonnelly (posted 2009-03-16 18:36:04.0)

I need OD3 at 1500 nm. Will LG1 goggles work?

Greg (posted 2009-01-26 16:02:27.0)

A response from Greg at Thorlabs to kebb: Thank you for purchasing Thorlabs products. The LG series of laser safety goggles are Ansi Z87 compliant.

kebb (posted 2009-01-26 15:07:34.0)

Hello, I purchased a pair of LG1 glasses from you. Are these glasses Ansi Z87 compliant? Thank you, Keith Ebbecke

Laurie (posted 2008-12-05 11:39:41.0)

Response from Laurie at Thorlabs to sebastian.marschall: Unfortunately, we do not have data on the LG1 goggles beyond 1050 nm. Although we can try to obtain this data for you, that wavelength is outside the specified range. Hence, we would be hesitant to suggest it. One of the members of our technical support staff will be contacting to you so we can make a goggle suggestion based on your application.

sebastian.marschall (posted 2008-12-05 10:27:31.0)

Do you have any numbers for the LG1 filter beyond 1090 nm? Does the OD drop very steeply? For my application D L4 up to 1150 nm would be preferable.

Laurie (posted 2008-12-02 11:19:55.0)

Response from Laurie at Thorlabs to bamberc: For an OD>4 at 405 nm, you have several options: LG2, LG3, or LG10. You can see the OD as a function of wavelength for each type of google on our website. The ones Ive recommended here have an actual rating at 405 nm. Thank you for your interest in our products. If you have additional questions, please let us know.

bamberc (posted 2008-12-02 10:57:05.0)

Would you have glasses for 405nm? OD 4 would be good.

Tyler (posted 2008-06-25 08:58:50.0)

A response from Tyler at Thorlabs to reza1729: I will email you a more detailed response but here is a summary. 1) The recommended storage temperature is for long term storage of laser glasses that are not being used. Please keep your laser glasses in the lab where they are needed. 2) The L-ratings for each pair of laser glasses are listed on the web page and on the spec sheet. For information on how to interpret the rating please see the information contained on the "Specs Tutorial" tab or contact one of our application engineers. 3) The peripheral protection is good but precautions should always be taken to avoid exposure to laser beams. 4) Burn marks on the glasses indicated direct exposure to a laser beam. The glasses should be replaced and the laboratory procedures reviewed so that future incidents do not occur. Cracked lenses or frames also warrant replacement of the glasses. Surface scratches on the lenses do not affect the function of the laser glasses as long as they do not impede vision. Thank you for your questions and for your interest in our product.

reza1729 (posted 2008-06-24 00:31:48.0)

I am very interested in your product. However, I have some important questions that I would like to have answered as soon as possible before I purchase the laser safety goggles. First, the site says that goggles should be stored in a room of less than 80 degrees F. How strict is the requirement? My lab is about that temperature, sometimes higher, sometimes lower. Would it be a better to store the frames in my home which is cooler and carry the goggles in my backpack on the days I need them? Could the goggles be stored in a refrigerator? Second, I was wondering if the orange lenses protect from direct exposure from an argon laser? I know this depends on the power of the laser, but what powers are protected. Third, I noticed the goggles dont have complete peripheral protection. Are there any precautions I need to take about laser beams from the side? Fourth, what sort damage should I keep an eye for on the goggle? I understand that goggles should be periodically checked for damages, but I was wondering if certain damages I should be looking for.

Tyler (posted 2008-04-14 13:36:21.0)

Response from Tyler at Thorlabs to srubin: Thank you for pointing out the spelling error. We have updated the presentation.

srubin (posted 2008-04-04 23:30:29.0)

I dont think google makes UV safety goggles yet. On the UV ones you might want to word it safety Goggles and not googles.

technicalmarketing (posted 2007-09-27 14:34:45.0)

In response to your question, VTL stands for visible transmitted light. It is often times abbreviated VLT (Visible Light Transmission). This value is a measure of how well you can see with these glasses on because it tells you how much visible light gets through them. In other words, if you purchase a pair with VLT of 12%, you might want to take them off before going down stairs and such because you will not be able to see well. We have updated the webpage to not use an abbreviation.

acable (posted 2007-09-27 12:20:59.0)

VTL? What does it mean.

technicalmarketing (posted 2007-09-26 16:44:33.0)

Based on several requests, we have moved the optical density versus wavelength plots to the subgroups for each product. We hope that you find this information useful.

acable (posted 2007-09-11 17:21:15.0)

Clicking through to the plots seems silly when there is all that space available next to each photograph of the glasses. The current plots that are combined with the photo are basically useless, why not just enlarge these plots and place them along side the photos. The little bit of text that is provided could be a sub-header under the title to each plot.

TechnicalMarketing (posted 2007-09-11 15:04:31.0)

Thank you for your presentation comments. It is always a pleasure to get feedback from our customers. With regards to the two comments posted, larger OD versus wavelength plots can be found under the Drawings & Documents Tab if you click on the specs sheet. I hope that you find these useful. As for the dual-use question, it would be difficult to provide general information that would be beneficial to a wide group since the correct saftety goggles are highly application specific. If you do have questions about which eyewear would be best suited to your individual application, I would recommend that you speak to our applications engineers by calling 1-973-300-3000.

russ.ferriday (posted 2007-08-19 20:19:05.0)

It would be helpful to provide recommendations based on performance/compliance for common spectra (e.g. 532nm, 635nm) and indicate which are the preferred choice for a dual-use, e.g., for 532 & 635.

cjohns (posted 2007-08-16 11:56:25.0)

It would be helpful if you offer a "Graphs" tab which shows a more detailed plot of OD vs Wavelength for easy reference and quick comparison between models.

Laser Safety Glasses: 59% Visible Light Transmission

Zoom

Click to Enlarge
Click Here for Raw Data
Plotted Values are Nominal, Refer to Printed Specifications

LB-Rating Specs (EN 207)^a
190 to 315 nm (D LB8 + IR LB4 + M LB6Y)
>315 to 425 nm (DIRM LB5)
790 to <808 nm (DIRM LB3)
808 to 840 nm (DIRM LB4)
>840 to 950 nm (DIRM LB5)
>950 to 1080 nm (D LB6 + IRM LB7^b)
>1080 to 1090 nm (DIRM LB5)

Refer to the Specs Tutorial tab above for a full explanation of the EN 207 markings.
For the M rating of LB7 in the wavelength range of >950 to 1064 nm, the glasses were tested at pulses between 12 ps and 170 fs.

OD Specs (ANSI Z136)
190 to 400 nm, OD = 5+
808 to 840 nm, OD = 4+
>840 to 950 nm, OD = 5+
>950 to 1080 nm, OD = 7+
>1080 to 1090 nm, OD = 5+

Laser Safety Glasses: 19% Visible Light Transmission

Zoom

Click to Enlarge
Click Here for Raw Data
Plotted Values are Nominal, Refer to Printed Specifications

LB-Rating Specs (EN 207)^a
180 to 315 nm (D LB6 + R LB4)
>315 to 400 nm (DR LB4)
>770 to 820 nm (DIR LB2)
>820 to 865 nm (DIR LB3)
>865 to 940 nm (DIR LB4)
>940 to 1064 nm (DIRM LB5)
>1064 to 1400 nm (DIRM LB4)
>1400 to 1850 nm (DI LB2)

Refer to the Specs Tutorial tab above for a full explanation of the EN 207 markings.

OD Specs (ANSI Z136)
180 to 450 nm, OD = 6+
770 to 1800 nm, OD = 2+
820 to 1720 nm, OD = 3+
870 to 1600 nm, OD = 4+
940 to 1070 nm, OD = 5+

Laser Safety Glasses: 48% Visible Light Transmission

Zoom

Click to Enlarge
Click Here for Raw Data
Plotted Values are Nominal, Refer to Printed Specifications

LB-Rating Specs (EN 207)^a
180 to 315 nm (D LB7 + IR LB4)
>315 to 532 nm (DIRM LB6)

Refer to the Specs Tutorial tab above for a full explanation of the EN 207 markings.

OD Specs (ANSI Z136)
180 to 532 nm, OD = 7+

Laser Safety Glasses: 12% Visible Light Transmission

Zoom

Click to Enlarge
Click Here for Raw Data
Plotted Values are Nominal, Refer to Printed Specifications

LB-Rating Specs (EN 207)^a
180 to 315 nm (D LB7 + R LB3)
>315 to 395 nm (D LB5 + R LB6)
625 to 670 nm & >800 to 830 nm (I LB4)
625 to 830 nm (DR LB4)
>670 to 800 nm (I LB5)
>830 to 850 nm (DIR LB3)
>850 to 860 nm (DIR LB2)
10,600 nm (DI LB2)

Refer to the Specs Tutorial tab above for a full explanation of the EN 207 markings.

OD Specs (ANSI Z136)
190 to 400 nm, OD = 5+
625 to 850 nm, OD = 4+
662 to 835 nm, OD = 5+
633 nm, OD = 5+

Laser Safety Glasses: 61% Visible Light Transmission

Zoom

Click to Enlarge
Click Here for Raw Data
Plotted Values are Nominal, Refer to Printed Specifications

LB-Rating Specs (EN 207)^a
180 to 315 nm, (D LB6 + R LB4)
>315 to 390 nm (D LB4 + R LB6)
785 to 800 nm (D LB4 + I LB5)
>800 to 818 nm (DR LB5 + IM LB6)
>818 to 830 nm (D LB4 + I LB5)
10,600 nm (DI LB2)

Refer to the Specs Tutorial tab above for a full explanation of the EN 207 markings.

OD Specs (ANSI Z136)
180 to 390 nm, OD = 6+
785 to 830 nm, OD = 5+
800 to 818 nm, OD = 6+

Laser Safety Glasses: 93% Visible Light Transmission

Zoom

Click to Enlarge
Click Here for Raw Data
Plotted Values are Nominal, Refer to Printed Specifications

LB-Rating Specs (EN 207)^a
190 to 315 nm (D LB7 + IR LB4)
>315 to 398 nm (DIRM LB5)
9,000 to 11,000 nm (DI LB3)

Refer to the Specs Tutorial tab above for a full explanation of the EN 207 markings.

OD Specs (ANSI Z136)
190 to 398 nm, OD = 7+
9,000 to 11,000 nm, OD = 7+

Laser Safety Glasses: 35% Visible Light Transmission

Zoom

Click to Enlarge
Click Here for Raw Data
Plotted Values are Nominal, Refer to Printed Specifications

LB-Rating Specs (EN 207)^a
180 to 315 nm (D LB6 + R LB4)
>315 to 400 nm (DR LB4)
>615 to 660 nm (DIR LB3)
>660 to 665 nm (DIR LB4)
>665 to 715 nm (D LB4 + IR LB5)
694 nm (IR LB7)

Refer to the Specs Tutorial tab above for a full explanation of the EN 207 markings.

OD Specs (ANSI Z136)
190 to 400 nm, OD = 6+
615 to 720 nm, OD = 3+
651 to 670 nm, OD = 4+
671 to 715 nm, OD = 5+
680 to 710 nm, OD = 6+
690 to 700 nm, OD = 7+

Laser Safety Glasses: 35% Visible Light Transmission

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Plotted Values are Nominal, Refer to Printed Specifications

LB-Rating Specs (EN 207)^a
610 to 664 nm (DIR LB1)
665 to <670 nm (DIR LB2)
670 to 690 nm (DIR LB3)
>690 to 698 nm (DIR LB2)
735 to 789 nm (DIR LB1)
790 to <808 nm (DIR LB2)
808 to 1050 nm (DIR LB3)
>1050 to 1080 nm (DIR LB2)

Refer to the Specs Tutorial tab above for a full explanation of the EN 207 markings.

OD Specs (ANSI Z136)
610 to 664 nm, OD = 1+
665 to <670 nm, OD = 2+
670 to 690 nm, OD = 3+
>690 to 698 nm, OD = 2+
735 to 789 nm, OD = 1+
790 to <808 nm, OD = 2+
808 to 1050 nm, OD = 3+
>1050 to 1080 nm, OD = 2+

Laser Safety Glasses: 25% Visible Light Transmission

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LB-Rating Specs (EN 207)^a
180 to 315 nm (D LB6 + R LB4)
>315 to 400 nm (DR LB4)
720 to 725 nm (DM LB5)
720 to 750 nm (IR LB5)
>1064 to 1075 nm (IR LB5)
>725 to 1075 nm (DM LB6)
>750 to 1064 nm (IRM LB7)^b

Refer to the Specs Tutorial tab above for a full explanation of the EN 207 markings.
For the M rating of LB7 in the corresponding wavelength range, the glasses were tested at pulses between 12 ps and 170 fs.

OD Specs (ANSI Z136)
180 to 400 nm, OD = 6+
720 to 1090 nm, OD = 5+
750 to 1064 nm, OD = 7+

Laser Safety Glasses: 35% Visible Light Transmission

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LB-Rating Specs (EN 207)^a
180 to 315 nm (D LB7 + R LB4)
>315 to 534 nm (D LB5 + IRM LB6)^b
850 to 925 nm (DIRM LB5)
>925 to 980 nm (D LB5 + IRM LB6)
>980 to 1064 nm (D LB6 + IRM LB7)^b
>1064 to 1085 nm (DIRM LB5)

Refer to the Specs Tutorial tab above for a full explanation of the EN 207 markings.
For M ratings of LB6 and LB7 in the corresponding wavelength ranges, the glasses were tested at pulses between 12 ps and 170 fs.

OD Specs (ANSI Z136)
190 to 534 nm, OD = 7+
850 to 925 nm, OD = 5+
>925 to 1070 nm, OD = 6+
960 to 1064 nm, OD = 7+

Laser Safety Glasses: 75% Visible Light Transmission

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Note: The LG11 and LG11A are made using Schott glass, and therefore use a different frame design than our other Universal style laser glasses. Fit over prescription glasses may be affected (see the Frame Styles tab for details). To ensure CE compliance, only two styles are offered. OD and LB-Rating specifications for the LG11 and LG11A are printed on the frame.

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LB-Rating Specs (EN 207)^a
850 to 900 nm (DIR LB3)
>900 to 950 nm (DIR LB4)
>950 to 1000 nm (DIR LB5)
>1000 to 1063 nm (DIR LB6)
>1063 to 1400 nm (D LB6)
>1063 to 1400 nm (IRM LB7Y)
1400 to 2200 nm (DIR LB4)
2900 to 3200 nm (DI LB4)
10,600 nm (DI LB4)

Refer to the Specs Tutorial tab above for a full explanation of the EN 207 markings.

OD Specs (ANSI Z136)
850 to 2800 nm, OD = 3+
900 to 2600 nm, OD = 4+
950 to 1010 nm, OD = 5+
>1010 to 1500 nm, OD = 7+
>1500 to 2350 nm, OD = 5+
>2800 to 10,600 nm, OD = 5+

Laser Safety Glasses: 11% Visible Light Transmission

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LB-Rating Specs (EN 207)^a
180 to 315 nm (D LB7 + R LB4)
>315 to 534 nm (D LB5 + IRM LB6)^b
730 to 740 nm (D LB5 + IRM LB6)
>740 to 1070 nm (D LB6 + IRM LB7)^b

Refer to the Specs Tutorial tab above for a full explanation of the EN 207 markings.
For M ratings of LB6 and LB7 in the corresponding wavelength ranges, the glasses were tested at pulses between 12 ps and 170 fs.

OD Specs (ANSI Z136)
180 to 534 nm, OD = 7+
720 to 730 nm, OD = 5+
>730 to 740 nm, OD = 6+
>740 to 1070 nm, OD = 7+

Laser Safety Glasses: 39% Visible Light Transmission

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Alignment Rating (EN 208)^a
0.01 W, 2 x 10^-6 J 605 - 675 nm (RB1)
0.1 W, 2 x 10^-5 J >675 - 695 nm (RB2)

Refer to the Specs Tutorial tab above for a full explanation of the EN 208 markings.

LB-Rating Specs (EN 207)^a
180 to 315 nm (D LB6 + R LB4)
>315 to 395 nm (D LB4)

Refer to the Specs Tutorial tab above for a full explanation of the EN 207 markings.

OD Specs (ANSI Z136)
190 to 380 nm OD = 5+
630 to 700 nm OD = 1.5+

Laser Safety Glasses: 47% Visible Light Transmission

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Alignment Rating Specs (EN 208)^a
0.1 W, 2 x 10^-5 J 518 - 523 nm (RB2)
1 W, 2 x 10^-4 J 524 - 532 nm (RB3)
0.1 W, 2 x 10^-5 J 533 - 536 nm (RB2)

Refer to the Specs Tutorial tab for a full explanation of the EN 208 markings.

OD Specs (ANSI Z136)
190 to 400 nm, OD = 5+
518 to 523 nm, OD = 2+
524 to 532 nm, OD = 3+
533 to 536 nm, OD 2+

Laser Safety Glasses: 15% Visible Light Transmission

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LB-Rating Specs (EN 207)^a
180 to 315 nm (D LB6 + R LB4)
>315 to 395 nm (DR LB4)
>575 to 600 nm (DI LB4)
582 to 598 nm (I LB6)
585 to 595 nm (I LB7)

Refer to the Specs Tutorial tab above for a full explanation of the EN 207 markings.

OD Specs (ANSI Z136)
190 to 400 nm, OD = 5+
576 to 600 nm, OD = 5+
582 to 598 nm, OD = 6+
585 to 595 nm, OD = 7+

Laser Safety Glasses: 41% Visible Light Transmission

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LB-Rating Specs (EN 207)^a
1400 - 1450 nm (DI LB1)
>1450 to 1650 nm (DI LB2)
>1650 to 1800 nm (DI LB3)
>1800 to 3000 nm (DI LB4)
5200 to 11000 nm (DI LB4)

Refer to the Specs Tutorial tab above for a full explanation of the EN 207 markings.

OD Specs (ANSI Z136)
190 to 400 nm, OD = 5+
1450 to 1650 nm, OD = 2+
>1650 to 1775 nm, OD = 3+
>1775 to 3000 nm, OD = 4+
1980 to 2550 nm, OD = 5+
5200 to 11000 nm, OD = 5+
9000 to 10600 nm, OD = 6+

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Certified Laser Safety Glasses

Features

OD to % Transmittance Conversions

ANSI Z136 and EN 207 Standards

Laser Mode Designation

European Norm for the Selection of Laser Safety Glasses

Alignment Rating (EN 208)

dBm to mW Power Conversions

Light Exiting a Fiber

Laser Safety and Classification

Safe Practices and Light Safety Accessories

Laser Classification

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