Four element infrared objective lens

Details Four element infrared objective lens Four element infrared objective lens

1981-04-03

1983-04-19

Arnold, Bruce Y.

G02B 100

Patent

active

043803636

ABSTRACT:
A four element infrared lens design is provided having lenses of crystalline semiconductor materials such as silicon and germanium. The system is designed to have an f/1.5 speed corrected over the spectral region of 3.3 to 4.2 microns, and to reduce field curvature produced by projecting an image on a flat detector. A particular object of the design is to minimize the effect of narcissus and loss of resolution.

REFERENCES:
patent: 3321264 (1967-05-01), Sijgers et al.

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