Periscopic viewfinder system for use in photographic cameras

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Details

350 45, G03B 1302

Patent

active

042708370

ABSTRACT:
For use in an afocal, periscopic viewfinder system of the type having four spaced apart elements, all equi-convex with aspherized surfaces and identical in pairs, and a central stop, there is provided a novel central reimaging system that is structured to increase the overall length of the viewfinder system without substantially changing the other characteristics or optical performance of the viewfinder system.

REFERENCES:
patent: 3583785 (1971-06-01), Boardman
patent: 3722979 (1973-03-01), Mikami
patent: 3792650 (1974-02-01), Mueller et al.
Smith, Modern Optical Engineering, New York, McGraw-Hill, pp. 212-213, 1966.

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