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GRIN Lenses
Mar 2014
Altechna UABRequest Info
VILNIUS, Lithuania, March 5, 2014 — Altechna’s gradient index (GRIN) lenses are suitable for applications in beam collimation or focusing, and laser-to-fiber, fiber-to-fiber and fiber-to-detector coupling.

Lenses with 0.25 pitch have a 0-mm working distance and are suited for beam collimation of optical fibers or laser diodes. The 0.23-pitch lenses have a small working distance and are used for focusing.

Lenses are available with one 8° wedged face and broadband antireflection coating to reduce back reflections.


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antireflection coating
A thin layer of material applied to a lens surface to reduce the amount of reflected energy. Ideally the index of refraction of that material should be equal to the square root of the product of the indices of the material on either side of the coating, while the ideal thickness for a single-layer coating is one-quarter of the wavelength at which reflectance is to be minimized. See also multilayer coating.
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