OPTICAL CRYSTALS IN INFRARED INSTRUMENTATION
Creators:Ballard, Stanley S.
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Publisher:Ohio State University
The use of optical crystals is becoming much more widespread, due principally to two factors: the ready availability of artificially grown crystals, and the increase of practical interest in the infrared region of the spectrum, where optical glass does not transmit. There is also a growing industrial interest in the ultraviolet spectral region, due to the increasing use of ultraviolet spectrophotometry and to recent developments in ultraviolet microscopy. The various synthetic crystals which are now employed in optical instrumentation are discussed in terms of their current availability and their physical properties. Charts are presented which facilitate the evaluation of several materials for such properties as infrared and ultraviolet transmission limits, dispersive power, elastic constants, cold flow, thermal expansion, thermal conductivity, melting point, solubility, and hardness.
Author Institution: Department of Physics, Tufts College