Variable focal length reflector lens system

Details Variable focal length reflector lens system Variable focal length reflector lens system

1976-03-03

1977-11-01

Sacher, Paul A.

350202, 350203, 350226, G02B 1514, G02B 1700

Patent

active

040563081

ABSTRACT:
A variable magnification lens in the form of a reflector lens as the equivalent of a symmetrical fulls lens without reflector. The invention is exemplified by a three-element zoom lens having a fixed outer element and a fixed reflector at the lens "center". The two inner elements form an integral pair and move with respect to the outer element to effect magnification change while maintaining a substantially flat image field over the entire magnification range.

REFERENCES:
patent: 2663223 (1953-12-01), Hopkins
patent: 3402003 (1968-09-01), McFarland
patent: 3871749 (1975-03-01), Harada

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