Optical: systems and elements – Single channel simultaneously to or from plural channels – By surface composed of lenticular elements
Patent
1997-10-16
1998-09-15
Epps, Georgia Y.
Optical: systems and elements
Single channel simultaneously to or from plural channels
By surface composed of lenticular elements
359335, 250332, 25033902, G02B 2710, H01S 300, H01L 2500, G01J 502
Patent
active
058087990
ABSTRACT:
An infrared lens assembly may comprise a lens set (32) including one or more refractive lenses. The refractive lens may be positioned along an optic axis (30) to receive infrared radiation. The lens set (32) may be designed to focus infrared radiation of a scene (14) at an image plane (15). An athermalization element (34) may be positioned along the optic axis (30) in optical communication with the lens set (32). The athermalization element (34) may include an infrared transmitting member (40) supporting a diffractive pattern (42). The infrared transmitting member (40) may comprise an infrared transmitting polymer. The diffractive pattern (42) may compensate for temperature induced changes in a focal length of the lens set (32) to maintain infrared radiation of the scene (14) in focus at the image plane (15).
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"A Hybrid Approach Opens Doors for Diffractive Optics," by Greg Behrmann and John Bowen, Phototronics Spectra, May 1993.
"Influence of temperature on diffractive lens performance," by Gregory P. Behmann and John P. Bowen, Applied Optics, May 1993, vol. 32, No. 14.
Epps Georgia Y.
Mack Ricky
Raytheon TI Systems Inc.
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