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View of a Ø105 µm Core Multimode Fiber with the FS200 Inspection Scope
The FS200 Fiber Inspection Scope produces a high-quality, low-distortion image of both the fiber end and surrounding ferrule. With a high-intensity illumination system and 200X magnification, this microscope is powerful enough to offer a clear image of the fiber core as well as the surrounding cladding. The FS200 offers both coaxial and oblique illumination settings. The oblique setting provides light at an off-center angle to the fiber end face for higher contrast. For critical examination of polish quality, we strongly recommend this fiber inspection scope.
The FS200 includes adapters for FC-/ST-/SC-/APC- (Ø2.5 mm Ferrules) and SMA-terminated (Ø3 mm ferrules) fibers. An LC adapter for Ø1.25 mm ferrules is also available below.
In order to see the entire field of view, the rubber eyepiece should be as close as possible to the operator's eye. Operators who normally wear eyeglasses should remove them to fully inspect the fiber. Please note that under normal operation, the focus adjustment knob should not be rotated to its limits. If used improperly, the unit can fail over time.
The 10125HG SMA height gauge is ideal for accurately measuring the height of a polished fiber optic SMA connector. SMA-to-SMA couplers are designed to have a non-contact interface, and since the insertion loss (IL) of an SMA-SMA junction is dependent on the distance between the two SMA connector end faces, the height of the polished SMA connector is important. We recommend frequent calibration using the attached calibration pin. For detailed calibration instructions, please see the manual.
To use, thread an SMA connectorized fiber into the port at the bottom of the gauge and hand tighten. The connector height measurement on the gauge face is with respect to 0.3860". The photo above shows a ferrule with a height of 0.3863" which reads as +3 ticks on the gauge face. Be sure the gauge is properly calibrated prior to use.
Please note the IEC standard for SMA ferrule height is 0.3850" - 0.3863" (IEC61754-22).
The graph to the right shows the theoretical insertion loss as a function of the separation of two SMA connectors using our M38L01 patch cable. The fiber in this cable has a core diameter of 200 µm, a numerical aperture of 0.39, and an index of 1.4571 at 633 nm. This graph was generated using the following equation:
where z is the separation distance, a is the radius of the core size in µm, NA is the numerical aperture of the fiber, and n0 is the index of the core. Click here to download an interactive Excel file which can be used to calculate and graph the theoretical insertion loss for any fiber.
Thorlabs' Premium Eye Loupes provide clear magnification that is ideal for inspecting optics and small parts. The eye loupes were designed by Thorlabs to maximize working distance when used with the knurled edge oriented towards the eye. They use a pair of glass achromatic doublets to minimize chromatic and other aberations. The AR coating on each optical surface is optimized to reduce internal reflections at wavelengths visible to the human eye. These high-quality magnifiers are suitable for quality control applications in industry or inspecting optics in the lab. They are available in 6X and 10X magnifications.
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This ray tracing demonstrates the virtual image seen through the EYL06X eye loupe.
Eye Loupe Magnification
The maximum magnification that can be achieved on the human retina is given by the loupe magnification definition, which is a thin-lens formula:
This Bausch & Lomb loupe is an ideal, economical tool for inspecting optics and small parts. The eyepiece provides a clear, 10X magnification. This loupe is designed to be used with the flared edge facing the eye. If the JEL10X does not meet your inspection needs, our premium eye loupes (featured above) provide a higher image quality and a wider field of view suitable for industry inspection applications.
This head-worn inspection magnifier is ESD compliant and cleanroom compatible. It is ideal for inspecting components when high magnification is not required and may be worn with or without prescription eyeglasses. The position of the magnifying lenses is adjustable so that they can be swung out of your line of sight when magnification is not needed.
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Partial Extension of Telescopting Arm
This telescoping inspection mirror is ideal for viewing components in hard-to-reach areas of the lab.
Scratch-dig paddles are used to determine the cosmetic surface quality of an optic. The paddle shown here has 7 rectangular sections and 7 circular sections each of which contains a different scratch or a different dig. Scratch-dig refers to the cosmetic quality of the surface of an optic and is defined by the U.S. military (MIL-PRF-13830A). Although not certified, this paddle contains scratch and dig features that can be compared to any optic for classification. To use the paddle, place it next to the optic you are inspecting and compare the imperfections on the optic's surface to the imperfections on the paddle.