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Sapphire Optics

Photonics Spectra
Nov 2010
Meller Optics Inc.Request Info
 
Custom fabricated sapphire optics that can replace CaF2 or MgF2 and other softer optical materials in applications from the UV to the IR are available from Meller Optics Inc. The optics can be produced as planoconvex, planoconcave and meniscus lenses, and as windows, mirrors and wave plates, in sizes from 1/4 to 10 in. in diameter and to 1/2 mm to 1in. in thickness. Featuring Moh 9 hardness, which is second only to diamond, sapphire transmits from the UV to the IR for applications where CaF2, MgF2, germanium, silicon and quartz are too soft. Providing up to 85% transmission uncoated from the UV to IR, the optics also can be supplied with various antireflection coatings for enhancing transmission to >99%.


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GLOSSARY
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.
germanium
A crystalline semiconductor material that transmits in the infrared.
quartz
See crystal quartz; fused quartz.
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