Infra-red optical systems

Details Infra-red optical systems Infra-red optical systems

1978-05-17

1980-04-22

Sacher, Paul A.

350 13, 350 14, 350 38, 350175E, 350183, 350189, 350212, 350 61, G02B 2500, G02B 1504, G02B 1510, G02B 2717

Patent

active

041992172

ABSTRACT:
The "eye-piece" for a non-Gallilean afocal infra-red telescope comprises a front element which is meniscus with a convex back surface of greater radius of curvature than its concave front surface but which has a thickness such that it is of positive power, and a back element of positive power with a convex front surface and a convex or concave back surface. Such an "eye-piece" can be used in combination with a variety of objective lens systems.

REFERENCES:
patent: 1553211 (1925-09-01), Barr et al.
patent: 3947084 (1976-03-01), Noyes
patent: 4106845 (1978-08-01), Moore et al.

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