Retrofocus type objective lens system

Details Retrofocus type objective lens system Retrofocus type objective lens system

1974-03-11

1976-02-03

Corbin, John K.

G02B 960

Patent

active

039361535

ABSTRACT:
A retrofocus type objective lens system consists of five lenses, from the object side, a front first lens, a biconvex second lens, a biconcave third lens, a positive meniscus fourth lens having a rear convex surface, and a positive fifth lens, the system satisfying the following conditions:

REFERENCES:
patent: 3731989 (1973-05-01), Shimizu

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