Wide spectral band infrared refractive lens

Details Wide spectral band infrared refractive lens Wide spectral band infrared refractive lens

1988-07-12

1989-10-03

Arnold, Bruce Y.

350453, 350474, 350572, G02B 300, G02B 912, G02B 2300

Patent

active

048712191

ABSTRACT:
The disclosure relates to a wide spectral band objective refractive apochromatic lens system capable of operation with infrared light in the 3 to 12 micron range with good color correction simultaneously. The lens system includes three lenses, the first lens being positive and formed of Texas Instruments 1173 glass and the second and third lenses being negative and formed of germanium and zinc sulfide respectively. The germanium lens has a power approximately 0.44 that of the 1173 glass lens and the zinc sulfide lens has a power approximately 0.22 that of the 1173 glass lens.

REFERENCES:
patent: 3778133 (1973-12-01), Tatian
patent: 4679891 (1987-07-01), Roberts
patent: 4714307 (1987-12-01), Palmer
Jamieson, "Ultra-Wide Waveband Optics", Proceedings of Spie, vol. 430, 1983.

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