Optical: systems and elements – Having significant infrared or ultraviolet property
Patent
1993-06-04
1995-01-31
Dzierzynski, Paul M.
Optical: systems and elements
Having significant infrared or ultraviolet property
359355, 359356, 359357, G02B 1516
Patent
active
053863151
ABSTRACT:
A compound lens for use in a low light level system operating in the near-infrared region. The lens system includes a high light-gathering ability requiring both a large aperture and good transmissivity over the wavelengths of interest. A wide field of view (e.g., 50.degree.) without excessive chromatic and geometric aberrations that generally accompanies systems with a large aperture is provided. Space is provided in the lens system for a variable iris and variable density spot subassembly. Desired optical quantities are obtained through the use of zinc selenide as the material for an aspheric lens. The use of this diamond-turnable infrared material as a field lens yields exceptional performance for a fast (e.g., F/1.25) lens with a wide field of view.
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Amon Max
Tejada John
Dzierzynski Paul M.
Martin Marietta Corporation
Nguyen Kiet T.
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