Telephoto lens system

Details Telephoto lens system Telephoto lens system

1975-12-08

1978-09-12

Clark, Conrad J.

350214, 350215, 350216, G02B 1302, G02B 960, G02B 962, G02B 964

Patent

active

041133579

ABSTRACT:
A telephoto lens system consists of a first convergent group and a divergent group disposed rearwardly of the first group for forming a substantially afocal converter, and a second convergent group disposed rearwardly of said divergent group. The first convergent lens group and the divergent lens group are movable relative to each other along the optical axis of the lens system for effecting focusing.

REFERENCES:
patent: 2440088 (1948-04-01), Grey
patent: 2582085 (1952-01-01), Tolle
patent: 3152209 (1964-10-01), Cox et al.
Jenkins et al., "Fundamentals of Optics", McGraw-Hill, 3rd ed., pp. 169-171.

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