Circular Precision Pinholes, Stainless Steel Foils


  • Pinhole Sizes from Ø1 μm to Ø9 mm
  • Stainless Steel Foils
  • Available Unmounted or in Aluminum Housings (Ø1/2" or Ø1")
  • Blackened for Increased Absorbance on Both Sides

P20K

Ø20 µm Pinhole,

Ø1" Housing

P7500K

7.5 mm Pinhole,

Ø1" Housing

P1000HK

Ø1 mm Pinhole,

Ø1/2" Housing

P5000UK

5 mm Pinhole,

Ø1/2" Diameter

Related Items


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Pinholed Mounted in Zoom Housing and XY Translator
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P5K Pinhole Mounted in SM1ZM Zoom Housing and ST1XY-D XY Translator

Features

  • Precision Pinholes in Stainless Steel Foils Available Unmounted or Mounted in Aluminum Housings
    • Ø2.5 mm to Ø9 mm Pinholes in Unmounted Ø1/2" Foils
    • Ø1 µm to Ø2 mm Pinholes with Ø1/2" Housings
    • Ø1 µm to Ø9 mm Pinholes with Ø1" Housings
  • Blackened for Increased Absorbance on Both Sides
  • Contact Tech Support to Discuss Custom Options

Single precision pinholes offer optical apertures for applications such as alignment, beam conditioning, and imaging. The Ø1 µm to Ø9 mm pinholes below are in blackened stainless steel foils, with select sizes available unmounted or mounted in black-anodized aluminum housings (Ø1/2" or Ø1"). We also offer pinholes with a variety of other foil materials; see the table to the right for options.

For many applications, such as holography, spatial intensity variations in the laser beam are unacceptable. Using precision pinholes in conjunction with positioning and focusing equipment such as our KT311(/M) Spatial Filter System creates a "noise" filter, effectively stripping variations in intensity out of a Gaussian beam. Please see the Tutorial tab for more information on spatial filters.

Precision Pinhole Options
Thorlabs' precision pinholes are available with an assortment of fabrication materials and coatings. The choice of a particular size and material should depend on the application. Low-power applications may benefit more from the absorbance of our blackened stainless steel foils, which are offered in anodized-aluminum housings, or our stainless steel foils with a black PVD coating, which are offered in vacuum-compatible stainless steel housings. High-power applications may need the high damage threshold and reflectance of gold-plated copper foils, the high melting point and lower reflectance of our tungsten foils, or the high melting point of our molybdenum foils paired with the low reflectance (4% @ 800 nm) of their black-coated front side. Please see the Foil Comparison and Graph tabs for more information.

In addition to single pinholes, Thorlabs also offers pinhole wheels that contain 16 radially-spaced pinholes that are lithographically etched onto a chrome-plated fused silica substrate. These wheels allow the user to test multiple pinhole sizes within a setup.

If you do not see what you need among our stock pinhole offerings, it is possible to special order pinholes that are fabricated from different substrate materials, have different pinhole sizes, incorporate multiple holes in one foil, or provide different pinhole configurations. Customized pinhole housings are also available. Please contact Tech Support to discuss your specific needs.

Precision Pinhole and Optical Slit Selection Guide
Material Product
Blackened Stainless Steel Circular Precision Pinholes
Square Precision Pinholes
Optical Slits
Stainless Steel with
PVD Black Coating
Circular Precision Pinholes
Gold-Plated Copper Foil (Rear)
and PVD Black Coating (Front)
Circular Precision Pinholes
Tungsten Foil Circular Precision Pinholes
Molybdenum Foil (Rear) and
Absorptive Polymer Coating (Front)
Circular Precision Pinholes

Precision Pinholes and Slits
Thorlabs offers precision pinholes with blackened stainless steel, gold-plated copper, tungsten, or molybdenum foils. Our pinholes with stainless steel foils are blackened on both sides for increased absorbance and are available from stock in circles from Ø1 µm to Ø9 mm and squares from 100 µm x 100 µm to 1 mm x 1 mm. Our stainless steel pinholes with a black PVD coating are vacuum compatible and available in 5 μm to 2 mm diameters. Our pinholes with gold-plated copper foils, plated with gold on one side and black PVD coated on the reverse, are available with pinhole diameters from 5 µm to 2 mm. Our pinholes with tungsten foils are uncoated and available with pinhole diameters from 5 µm to 2 mm. Lastly, our pinholes with molybdenum foils have an absorptive polymer coating on the front sides and are available with pinhole diameters from 5 µm to 2 mm. We also offer slits in blackened stainless steel foils from stock with slit widths from 5 to 200 µm.

If you do not see what you need among our stock pinhole and slit offerings, it is also possible to special order pinholes and slits that are made with different foil materials, have different hole sizes and shapes, incorporatoles in one foil, or provide different hole configurations. Please contact Tech Support to discuss your specific needs. For more information on the properties of the bulk materials from which the pinholes are fabricated, see the table below.

 

Material Properties
Depending on the application, it can be important to consider the material properties of the pinhole or slit. The material used to construct the aperture can have varying levels of melting point, density, and thermal conductivity, as detailed in the table below.

Material Properties
Material 300 Series Stainless Steela Copperb Tungsten Molybdenumc
Melting Point 1390 - 1450 °C 1085 °C 3422 °C 2623 °C
Density 8.03 g/cm3 8.96 g/cm3 19.25 g/cm3 10.28 g/cm3
Brinell Hardness 170 MPa 878 MPa 2570 MPa 1500 MPa
Damage Thresholdd (10 ns Pulse, 1 kHz @ 355 nm) 1.54 MW/mm2 4.82 MW/mm2 9.39 MW/mm2 6.34 MW/mm2
Thermal Expansion Coefficient 16.2 (µm/m)/°C 16.7 (µm/m)/°C 4.5 (µm/m)/°C 5.0 (µm/m)/°C
Specific Heat @ 20 °C 485 J/(K*kg) 385 J/(K*kg) 134 J/(K*kg) 250 J/(K*kg)
Thermal Conductivity 16.2 W/(m*K) 401 W/(m*K) 173 W/(m*K) 138 W/(m*K)
Thermal Diffusivity @ 300 K 3.1 mm2/s 111 mm2/s 80 mm2/s 54.3 mm2/s
  • Stainless steel pinholes and slits are blackened on both sides to increase absorbance. The material properties will be predominantly that of bulk stainless steel.
  • Gold-plated copper pinholes have a thin coating of gold on one side of the bulk copper foil. With a beam incident on this side, reflectance will be dominated by the properties of the thin gold coating (77% @ 800 nm), while thermal properties will be predominantly copper-based.
  • Molybdenum pinholes have an absorptive coating on the front side. The material properties will be predominantly that of bulk molybdenum.
  • Damage threshold data refers to the bulk materials listed here only.

 

Reflectance
The reflectance of the foil material or coating affects performance in a variety of applications. Below is presented a reflectance graph for all the materials and coatings that are offered with our circular and square precision pinholes, as well as our mounted optical slits. The raw reflectance data can be found here.

It is important to note that the front of the gold-plated copper foil circular precision pinholes have a low-reflectance PVD black coating. The rear of these pinholes leaves the gold-plated copper foil bare. This also occurs on the molybdenum foil circular precision pinholes, which have a low-reflectance absorptive polymer coating on the front and the molybdenum foil is left bare on the back.

Reflectance Graph

Below is presented a reflectance graph for the blackened stainless steel on the circular precision pinholes. The raw reflectance data can be found here.

Principles of Spatial Filters

For many applications, such as holography, spatial intensity variations in the laser beam are unacceptable. Our KT311 spatial filter system is ideal for producing a clean Gaussian beam.

Spatial Filter System Ray Diagram

Figure 1: Spatial Filter System

The input Gaussian beam has spatially varying intensity "noise". When a beam is focused by an aspheric lens, the input beam is transformed into a central Gaussian spot (on the optical axis) and side fringes, which represent the unwanted "noise" (see Figure 2 below). The radial position of the side fringes is proportional to the spatial frequency of the "noise".

Input Gaussian Beam

Figure 2

By centering a pinhole on a central Gaussian spot, the "clean" portion of the beam can pass while the "noise" fringes are blocked (see Figure 3 below).

Clean Gaussian Beam

Figure 3

The diffraction-limited spot size at the 99% contour is given by:

Diffraction-Limited Spot Size

where λ = wavelength, ƒ=focal length and r = input beam radius at the 1/e2 point.

Choosing the Correct Optics and Pinhole for Your Spatial Filter System

The correct optics and pinhole for your application depend on the input wavelength, source beam diameter, and desired exit beam diameter.

For example, suppose that you are using a 650 nm diode laser source that has a diameter (1/e2) of 1.2 mm and want your beam exiting the spatial filter system to be about 4.4 mm in diameter. Based on these parameters, the C560TME-B mounted aspheric lens would be an appropriate choice for the input side of spatial filter system because it is designed for use at 650 nm, and its clear aperture measures 5.1 mm, which is large enough to accommodate the entire diameter of the laser source.

The equation for diffraction limited spot size at the 99% contour is given above, and for this example, λ = (650 x 10-9 m), f = 13.86 mm for the C560TM-B, and r = 0.6 mm. Substitution yields

Spot Size Example

Diffraction-Limited Spot Size (650 nm source, Ø1.2 mm beam)

The pinhole should be chosen so that it is approximately 30% larger than D. If the pinhole is too small, the beam will be clipped, but if it is too large, more than the TEM00 mode will get through the pinhole. Therefore, for this example, the pinhole should ideally be 19.5 microns. Hence, we would recommend the mounted pinhole P20D, which has a pinhole size of 20 μm. Parameters that can be changed to alter the beam waist diameter, and thus the pinhole size required, include changing the input beam diameter and focal length of focusing lens. Decreasing the input beam diameter will increase the beam waist diameter. Using a longer focal length focusing lens will also increase the beam waist diameter.

Finally, we need to choose the optic on the output side of the spatial filter so that the collimated beam's diameter is the desired 4.4 mm. To determine the correct focal length for the lens, consider the following diagram in Figure 4, which is not drawn to scale. From the triangle on the left-hand side, the angle is determined to be approximately 2.48o. Using this same angle for the triangle on the right-hand side, the focal length for the plano-convex lens should be approximately 50 mm.

Spatial Filter Diagram

Figure 4:
 Beam Expansion Example

For this focal length, we recommend the LA1131-B plano-convex lens [with f = 50 mm at the design wavelength (λ = 633 nm), this is still a good approximation for f at the source wavelength (λ = 650 nm)].

Note: The beam expansion equals the focal length of the output side divided by the focal length of the input side.

For optimal performance, a large-diameter aspheric lens can be used in place of a plano-convex lens if the necessary focal length on the output side is 20 mm (see AL2520-A, AL2520-B, AL2520-C). These lenses are 25 mm in diameter and can be held in place using the supplied SM1RR Retaining Ring.

Beam Circularization Setup
Click to Enlarge

 Figure 1: The beam circularization systems were placed in the area of the experimental setup highlighted by the yellow rectangle.
Spatial Filter Setup
Click to Enlarge

Figure 4: Spatial Filter System
Anamorphic Prism Pair Setup
Click to Enlarge

Figure 3: Anamorphic Prism Pair System
Cylindrical Lens Pair Setup
Click to Enlarge

Figure 2: Cylindrical Lens Pair System

Comparison of Circularization Techniques for Elliptical Beams

Edge-emitting laser diodes emit elliptical beams as a consequence of the rectangular cross sections of their emission apertures. The component of the beam corresponding to the narrower dimension of the aperture has a greater divergence angle than the orthogonal beam component. As one component diverges more rapidly than the other, the beam shape is elliptical rather than circular. 

Elliptical beam shapes can be undesirable, as the spot size of the focused beam is larger than if the beam were circular, and as larger spot sizes have lower irradiances (power per area). Techniques for circularizing an elliptical beam include those based on a pair of cylindrical lenses, an anamorphic prism pair, or a spatial filter. This work investigated all three approaches. The characteristics of the circularized beams were evaluated by performing M2 measurements, wavefront measurements, and measuring the transmitted power. 

While it was demonstrated that each circularization technique improves the circularity of the elliptical input beam, each technique was shown to provide a different balance of circularization, beam quality, and transmitted power. The results of this work, which are documented in this Lab Fact, indicate that an application's specific requirements will determine which is the best circularization technique to choose.

Experimental Design and Setup

The experimental setup is shown in Figure 1. The elliptically-shaped, collimated beam of a temperature-stabilized 670 nm laser diode was input to each of our circularization systems shown in Figures 2 through 4. Collimation results in a low-divergence beam, but it does not affect the beam shape. Each system was based on one of the following:

The beam circularization systems, shown to the right, were placed, one at a time, in the vacant spot in the setup highlighted by the yellow rectangle. With this arrangement, it was possible to use the same experimental conditions when evaluating each circularization technique, which allowed the performance of each to be directly compared with the others. This experimental constraint required the use of fixturing that was not optimally compact, as well as the use of an unmounted anamorphic prism pair, instead of a more convenient mounted and pre-aligned anamorphic prism pair.

The characteristics of the beams output by the different circularization systems were evaluated by making measurements using a power meter, a wavefront sensor, and an M2 system. In the image of the experimental setup, all of these systems are shown on the right side of the table for illustrative purposes; they were used one at a time. The power meter was used to determine how much the beam circularization system attenuated the intensity of the input laser beam. The wavefront sensor provided a way to measure the abberations of the output beam. The M2 system measurement describes the resemblence of the output beam to a Gaussian beam. Ideally, the circularization systems would not attenuate or abberate the laser beam, and they would output a perfectly Gaussian beam. 

Edge-emitting laser diodes also emit astigmatic beams, and it can be desirable to force the displaced focal points of the orthogonal beam components to overlap. Of the three circularization techniques investigated in this work, only the cylindrical lens pair can also compensate for astigmatism. The displacement between the focal spots of the orthogonal beam components were measured for each circularization technique. In the case of the cylindrical lens pair, their configuration was tuned to minimize the astigmatism in the laser beam. The astigmatism was reported as a normalized quantity.

Experimental Results

The experimental results are summarized in the following table, in which the green cells identify the best result in each category. Each circularization approach has its benefits. The best circularization technique for an application is determined by the system’s requirements for beam quality, transmitted optical power, and setup constraints. 

Spatial filtering significantly improved the circularity and quality of the beam, but the beam had low transmitted power. The cylindrical lens pair provided a well-circularized beam and balanced circularization and beam quality with transmitted power. In addition, the cylindrical lens pair compensated for much of the beam's astigmatism. The circularity of the beam provided by the anamorphic prism pair compared well to that of the cylindrical lens pair. The beam output from the prisms had better M2 values and less wavefront error than the cylindrical lenses, but the transmitted power was lower. 

Method Beam Intensity Profile Circularitya M2 Values RMS Wavefront Transmitted Power Normalized 
Astigmatismb
Collimated Source Output
(No Circularization Technique)
Collimated
Click to Enlarge

Scale in Microns
0.36 X Axis: 1.28
Y Axis: 1.63
0.17 Not Applicable 0.67
Cylindrical Lens Pair Cylindrical
Click to Enlarge

Scale in Microns
0.84 X Axis: 1.90
Y Axis: 1.93
0.30 91% 0.06
Anamorphic Prism Pair
Anamorphic
Click to Enlarge

Scale in Microns
0.82 X Axis: 1.60
Y Axis: 1.46
0.16 80% 1.25
Spatial Filter Spatial
Click to Enlarge

Scale in Microns
0.93 X Axis: 1.05
Y Axis: 1.10
0.10 34% 0.36
  • Circularity=dminor/dmajor, where dminor and dmajor are minor and major diameters of fitted ellipse (1/e intensity) and Circularity = 1 indicates a perfectly circular beam.
  • Normalized astigmatism is the difference in the waist positions of the two orthogonal components of the beam, divided by the Raleigh length of the beam component with the smaller waist.

Components used in each circularization system were chosen to allow the same experimental setup be used for all experiments. This had the desired effect of allowing the results of all circularization techniques to be directly compared; however, optimizing the setup for a circularization technique could have improved its performance. The mounts used for the collimating lens and the anamorphic prism pair enabled easy manipulation and integration into this experimental system. It is possible that using smaller mounts would improve results by allowing the members of each pair to be more precisely positioned with respect to one another. In addition, using made-to-order cylindrical lenses with customized focal lengths may have improved the results of the cylindrical lens pair circularization system. All results may have been affected by the use of the beam profiler software algorithm to determine the beam radii used in the circularity calculation.

Additional Information

Some information describing selection and configuration procedures for several components used in this experimental work can be accessed by clicking the following hyperlinks: 


Posted Comments:
Fabrice Del Cul  (posted 2022-03-12 03:05:46.44)
Hi Thorlabs crew, same question Eberhard posted below. In fact 50µm thickness is too large for spatial filtering application. What is the true thickness near hole edge....really 50µm? Thank you. Best regards
jgreschler  (posted 2022-03-21 11:46:43.0)
Thank you for contacting Thorlabs. The thickness of the foil is 50um over the entire surface of the pinhole, however there is some degree to which the pinhole geometry is conical. I have reached out to you directly with more information.
Eberhard Riedle  (posted 2021-12-19 13:18:53.077)
Dear Sirs, inspecting some of your pinholes on a stereo microscope, we have the strong impression that the appearance is different from the two sides. Is the "hole" cylindrical or conical? This would make the prefered direction of use significantly differing. Unfortunately, we do not find any info on this issue on your website. Please advise! Also, we thing the drawings of the retaining ring (cut) are erroneous. Beste regards Eberhard Riedle
jgreschler  (posted 2021-12-30 08:39:30.0)
Thank you for reaching out to Thorlabs. I have contacted you directly to discuss this further.
Przemyslaw Gontar  (posted 2021-12-09 07:58:15.91)
Hello, what is reflectance @ 633 nm on front side?
jgreschler  (posted 2021-12-16 03:29:18.0)
Thank you for reaching out to Thorlabs. The reflectance value of the black coated stainless steel at 600nm is between 15 and 20 percent. I will reach out to you directly to discuss further.
Fedor Talantov  (posted 2021-06-14 13:12:03.313)
Hello, Is it possible to have a precision pinhole with a diameter of 7000 um (7mm) manufactured? Thanks, Fedor.
YLohia  (posted 2021-06-15 11:04:41.0)
Hello Fedor, custom parts can be requested by using the "Request Quote" button above. We will contact you directly to discuss the possibility of offering this.
Apertures Selection Guide
Aperture Type Representative Image
(Click to Enlarge)
Description Aperture Sizes Available from Stocka
Single Precision Pinholesa
Circular Pinholes in Stainless Steel Foils Ø1 µm to Ø9 mm
Circular Pinholes in Stainless Steel Foils,
Vacuum Compatible
Ø5 µm to Ø2 mm
Circular Pinholes in Gold-Plated Copper Foils Ø5 µm to Ø2 mm
Circular Pinholes in Tungsten Foils Ø5 µm to Ø2 mm
Circular Pinholes in Molybdenum Foils Ø5 µm to Ø2 mm
Square Pinholes in Stainless Steel Foils 100 to 1000 µm Square
Slitsa Slits in Stainless Steel Foils 3 mm Slit Lengths: 5 to 200 µm Widths
10 mm Slit Lengths: 20 to 200 µm Widths
Annular Apertures Annular Aperture Obstruction Targets on
Quartz Substrates with Chrome Masks
Ø300 µm or Ø2 mm Pinholes with ε Ratiosb of 0.85, 
Ø1 mm Pinholes with ε Ratiosb of 0.05 0.1, or 0.85
Pinhole Wheels Manual, Mounted, Chrome-Plated Fused Silica Disks
with Lithographically Etched Pinholes
Each Disk has 16 Pinholes from Ø25 µm to Ø2 mm and
Four Annular Apertures (Ø100 µm Hole, 50 µm Obstruction)
Motorized Pinhole Wheels with Chrome-Plated Glass Disks
with Lithographically Etched Pinholes
Each Disk has 16 Pinholes from Ø25 µm to Ø2 mm and
Four Annular Apertures (Ø100 µm Hole, 50 µm Obstruction)
  • Single precision pinholes and slits can be special ordered with different aperture sizes, foil materials, shapes, and hole distributions than those offered from stock. Please contact Tech Support with inquiries.
  • Ratio of the Obstruction Diameter to the Pinhole Diameter

Pinholes, Ø1/2" Stainless Steel Foils

  • Precision Pinholes from Ø2.5 mm to Ø9 mm
  • Stainless Steel Foils are Blackened on Both Sides for Increased Absorbance

These unmounted precision pinholes are available with pinhole diameters from 2.5 mm to 9 mm. They are fabricated from stainless steel foils that are blackened on both sides. When handling the pinholes, please use small tweezers or pliers; use care as the foil is very thin (50 µm). These pinholes can be mounted in our SM05-Threaded Lens Tubes, secured between two retaining rings.

Upon request, these pinholes are available with item-specific test reports at an additional cost. Please contact Tech Support for details.

Item # Pinhole Diameter Diameter Tolerance Circularity Foil Thickness Foil Material
P2500UK 2.5 mm ±20 µm ≥95% 50 µm 300 Series Stainless Steel,
Black-Oxide Conversion Coating
P3000UK 3 mm ±20 µm
P5000UK 5 mm ±30 µm
P7500UK 7.5 mm ±50 µm
P9000UK 9 mm ±80 µm
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
P2500UK Support Documentation
P2500UKNEW!Ø1/2" (12.7 mm) Umounted Large Pinhole, 2500 ± 20 µm Pinhole Diameter, Stainless Steel
$73.08
Today
P3000UK Support Documentation
P3000UKNEW!Ø1/2" (12.7 mm) Umounted Large Pinhole, 3000 ± 20 µm Pinhole Diameter, Stainless Steel
$73.08
Today
P5000UK Support Documentation
P5000UKNEW!Ø1/2" (12.7 mm) Umounted Large Pinhole, 5000 ± 30 µm Pinhole Diameter, Stainless Steel
$73.08
Today
P7500UK Support Documentation
P7500UKNEW!Ø1/2" (12.7 mm) Umounted Large Pinhole, 7500 ± 50 µm Pinhole Diameter, Stainless Steel
$73.08
Today
P9000UK Support Documentation
P9000UKNEW!Ø1/2" (12.7 mm) Umounted Large Pinhole, 9000 ± 80 µm Pinhole Diameter, Stainless Steel
$73.08
Today

Pinholes, Stainless Steel Foils, Ø1/2" Housings

Mounted Pinhole Dimensions
Click to Enlarge

Dimensions for Mounted Stainless Steel Pinholes in Ø1/2" (12.7 mm) Housing
Stainless Steel Pinhole Rear
Click to Enlarge

Rear of Mounted Pinhole
  • Precision Pinholes from Ø1 µm to Ø9 mm
  • Stainless Steel Foils are Blackened on Both Sides for Increased Absorbance
  • Black-Anodized Aluminum Housings with 1/2" (12.7 mm) Outer Diameters

These mounted precision pinholes are available with pinhole diameters from 1 µm to 2 mm. They are fabricated from stainless steel foils that are blackened on both sides. The foils are mounted in Ø1/2" (12.7 mm), 0.10" (2.5 mm) thick aluminum housings that are black-anodized. Each housing is engraved with the pinhole item # and the size of the pinhole.

The foils can be taken out of their housings by removing the retaining ring using small tweezers or pliers; use care as the foil is very thin (50 µm).

Upon request, these pinholes are available with item-specific test reports at an additional cost. Please contact Tech Support for details.

Item # Pinhole Diameter Diameter Tolerance Circularity Foil Thickness Foil Material Housing Material
P1HK 1 µm +0.25 / -0.10 µm ≥85% 50 µm 300 Series Stainless Steel,
Black-Oxide Conversion Coating
6061-T6 Aluminum
P2HK 2 µm ±0.25 µm
P5HKa 5 µm ±1 µm >90%
P10HKa 10 µm
P15HKa 15 µm ±1.5 µm
P20HKa 20 µm ±2 µm
P25HKa 25 µm ±2 µm ≥95%
P30HKa 30 µm
P40HKa 40 µm ±3 µm
P50HKa 50 µm
P75HKa 75 µm
P100HKa 100 µm ±4 µm
P150HKa 150 µm ±6 µm
P200HKa 200 µm
P300HK 300 µm ±8 µm
P400HK 400 µm ±10 µm
P500HK 500 µm
P600HK 600 µm
P700HK 700 µm
P800HK 800 µm
P900HK 900 µm
P1000HK 1 mm
P2000HK 2 mm
  • Includes Engraved Crosshair to Facilitate Alignment
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
P1HK Support Documentation
P1HKØ1/2" (12.7 mm) Mounted Pinhole, 1 +0.25 / -0.10 µm Pinhole Diameter, Stainless Steel
$142.73
Today
P2HK Support Documentation
P2HKØ1/2" (12.7 mm) Mounted Pinhole, 2 ± 0.25 µm Pinhole Diameter, Stainless Steel
$142.73
Today
P5HK Support Documentation
P5HKØ1/2" (12.7 mm) Mounted Pinhole, 5 ± 1 µm Pinhole Diameter, Stainless Steel
$85.07
Today
P10HK Support Documentation
P10HKØ1/2" (12.7 mm) Mounted Pinhole, 10 ± 1 µm Pinhole Diameter, Stainless Steel
$85.07
Today
P15HK Support Documentation
P15HKØ1/2" (12.7 mm) Mounted Pinhole, 15 ± 1.5 µm Pinhole Diameter, Stainless Steel
$85.07
Today
P20HK Support Documentation
P20HKØ1/2" (12.7 mm) Mounted Pinhole, 20 ± 2 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P25HK Support Documentation
P25HKØ1/2" (12.7 mm) Mounted Pinhole, 25 ± 2 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P30HK Support Documentation
P30HKØ1/2" (12.7 mm) Mounted Pinhole, 30 ± 2 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P40HK Support Documentation
P40HKØ1/2" (12.7 mm) Mounted Pinhole, 40 ± 3 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P50HK Support Documentation
P50HKØ1/2" (12.7 mm) Mounted Pinhole, 50 ± 3 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P75HK Support Documentation
P75HKØ1/2" (12.7 mm) Mounted Pinhole, 75 ± 3 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P100HK Support Documentation
P100HKØ1/2" (12.7 mm) Mounted Pinhole, 100 ± 4 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P150HK Support Documentation
P150HKØ1/2" (12.7 mm) Mounted Pinhole, 150 ± 6 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P200HK Support Documentation
P200HKØ1/2" (12.7 mm) Mounted Pinhole, 200 ± 6 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P300HK Support Documentation
P300HKØ1/2" (12.7 mm) Mounted Pinhole, 300 ± 8 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P400HK Support Documentation
P400HKØ1/2" (12.7 mm) Mounted Pinhole, 400 ± 10 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P500HK Support Documentation
P500HKØ1/2" (12.7 mm) Mounted Pinhole, 500 ± 10 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P600HK Support Documentation
P600HKØ1/2" (12.7 mm) Mounted Pinhole, 600 ± 10 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P700HK Support Documentation
P700HKØ1/2" (12.7 mm) Mounted Pinhole, 700 ± 10 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P800HK Support Documentation
P800HKØ1/2" (12.7 mm) Mounted Pinhole, 800 ± 10 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P900HK Support Documentation
P900HKØ1/2" (12.7 mm) Mounted Pinhole, 900 ± 10 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P1000HK Support Documentation
P1000HKØ1/2" (12.7 mm) Mounted Pinhole, 1000 ± 10 µm Pinhole Diameter, Stainless Steel
$77.08
7-10 Days
P2000HK Support Documentation
P2000HKØ1/2" (12.7 mm) Mounted Pinhole, 2000 ± 10 µm Pinhole Diameter, Stainless Steel
$77.08
Today

Pinholes, Stainless Steel Foils, Ø1" Housings

Mounted Pinhole Dimensions
Click for Details

Dimensions for Mounted Stainless Steel Pinholes in Ø1" Housing
Microscope Image of Pinhole
Click to Enlarge

Microscope Image of Precision Pinhole
Stainless Steel Pinhole Rear
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Rear of Mounted Pinhole
  • Precision Pinholes from Ø1 µm to Ø9 mm
  • Stainless Steel Foils are Blackened on Both Sides for Increased Absorbance
  • Black-Anodized Aluminum Housings with 1" Outer Diameters

These mounted precision pinholes are available with pinhole diameters from 1 µm to 9 mm. They are fabricated from stainless steel foils that are blackened on both sides. The foils are mounted in Ø1", 0.10" (2.5 mm) thick aluminum housings that are black-anodized. Each housing is engraved with the pinhole item # and the size of the pinhole.

The foils can be taken out of their housings by removing the retaining ring or spring using small tweezers or pliers; use care as the foil is very thin (50 µm).

Upon request, these pinholes are available with item-specific test reports at an additional cost. Please contact Tech Support for details.

Item # Pinhole Diameter Diameter Tolerance Circularity Foil Thickness Foil Material Housing Material
P1K 1 µm +0.25 / -0.10 µm ≥85% 50 µm 300 Series Stainless Steel,
Black-Oxide Conversion Coating
6061-T6 Aluminum
P2K 2 µm ±0.25 µm
P5Ka 5 µm ±1 µm >90%
P10Ka 10 µm
P15Ka 15 µm ±1.5 µm
P20Ka 20 µm ±2 µm
P25Ka 25 µm ±2 µm ≥95%
P30Ka 30 µm
P40Ka 40 µm ±3 µm
P50Ka 50 µm
P75Ka 75 µm
P100Ka 100 µm ±4 µm
P150Ka 150 µm ±6 µm
P200Ka 200 µm ±6 µm
P300K 300 µm ±8 µm
P400K 400 µm ±10 µm
P500K 500 µm
P600K 600 µm
P700K 700 µm
P800K 800 µm
P900K 900 µm
P1000K 1 mm
P2000K 2 mm
P2500K 2.5 mm ±20 µm
P3000K 3 mm ±20 µm
P5000K 5 mm ±30 µm
P7500K 7.5 mm ±50 µm
P9000K 9 mm ±80 µm
  • Includes Engraved Crosshair to Facilitate Alignment
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
P1K Support Documentation
P1KØ1" Mounted Pinhole, 1 +0.25 / -0.10 µm Pinhole Diameter, Stainless Steel
$142.73
Today
P2K Support Documentation
P2KØ1" Mounted Pinhole, 2 ± 0.25 µm Pinhole Diameter, Stainless Steel
$142.73
Today
P5K Support Documentation
P5KØ1" Mounted Pinhole, 5 ± 1 µm Pinhole Diameter, Stainless Steel
$85.07
Today
P10K Support Documentation
P10KØ1" Mounted Pinhole, 10 ± 1 µm Pinhole Diameter, Stainless Steel
$85.07
Today
P15K Support Documentation
P15KØ1" Mounted Pinhole, 15 ± 1.5 µm Pinhole Diameter, Stainless Steel
$85.07
Today
P20K Support Documentation
P20KØ1" Mounted Pinhole, 20 ± 2 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P25K Support Documentation
P25KØ1" Mounted Pinhole, 25 ± 2 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P30K Support Documentation
P30KØ1" Mounted Pinhole, 30 ± 2 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P40K Support Documentation
P40KØ1" Mounted Pinhole, 40 ± 3 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P50K Support Documentation
P50KØ1" Mounted Pinhole, 50 ± 3 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P75K Support Documentation
P75KØ1" Mounted Pinhole, 75 ± 3 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P100K Support Documentation
P100KØ1" Mounted Pinhole, 100 ± 4 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P150K Support Documentation
P150KØ1" Mounted Pinhole, 150 ± 6 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P200K Support Documentation
P200KØ1" Mounted Pinhole, 200 ± 6 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P300K Support Documentation
P300KØ1" Mounted Pinhole, 300 ± 8 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P400K Support Documentation
P400KØ1" Mounted Pinhole, 400 ± 10 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P500K Support Documentation
P500KØ1" Mounted Pinhole, 500 ± 10 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P600K Support Documentation
P600K Ø1" Mounted Pinhole, 600 ± 10 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P700K Support Documentation
P700KØ1" Mounted Pinhole, 700 ± 10 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P800K Support Documentation
P800KØ1" Mounted Pinhole, 800 ± 10 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P900K Support Documentation
P900KØ1" Mounted Pinhole, 900 ± 10 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P1000K Support Documentation
P1000KØ1" Mounted Pinhole, 1000 ± 10 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P2000K Support Documentation
P2000KØ1" Mounted Pinhole, 2000 ± 10 µm Pinhole Diameter, Stainless Steel
$77.08
7-10 Days
P2500K Support Documentation
P2500KNEW!Ø1" Mounted Large Pinhole, 2500 ± 20 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P3000K Support Documentation
P3000KNEW!Ø1" Mounted Large Pinhole, 3000 ± 20 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P5000K Support Documentation
P5000KNEW!Ø1" Mounted Large Pinhole, 5000 ± 30 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P7500K Support Documentation
P7500KNEW!Ø1" Mounted Large Pinhole, 7500 ± 50 µm Pinhole Diameter, Stainless Steel
$77.08
Today
P9000K Support Documentation
P9000KNEW!Ø1" Mounted Large Pinhole, 9000 ± 80 µm Pinhole Diameter, Stainless Steel
$77.08
Today