High speed infrared wide angle lens system

Details High speed infrared wide angle lens system High speed infrared wide angle lens system

1986-03-13

1988-04-19

Corbin, John K.

350465, G02B 1314, G02B 900

Patent

active

047384964

ABSTRACT:
There is disclosed an objective or compound lens with high speed and large field angle for applications using infrared radiation. Preferred embodiments of the lens system have a useful spectral bandpass in the 2-2.5 .mu.m and 1.5-2.5 .mu.m region. These embodiments are constructed to have low resolution, a speed up to F/0.7 and a total field angle up to 60 degrees. Two embodiments comprise only 4 spherical lenses. By simple calculations the disclosed objectives or compound lenses may be matched to lens materials for use within other ranges of the infrared spectrum as well.

REFERENCES:
patent: 3586419 (1971-06-01), Wakimoto
patent: 4046460 (1977-09-01), Koizumi
patent: 4380363 (1983-04-01), Fjeldsted
patent: 4484802 (1984-11-01), Kikuchi
patent: 4600265 (1986-07-01), Norrie
patent: 4673259 (1987-06-01), Kawamura

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