Compact wide angle lens

Details Compact wide angle lens Compact wide angle lens

1980-02-04

1982-06-08

Evans, F. L.

350461, G02B 1304

Patent

active

043337147

ABSTRACT:
A retrofocus lens having a field angle of up to 76.degree. and comprising as few as six elements. A strongly negative front group of only two elements contributes to the compactness of the lens.

REFERENCES:
patent: 3737213 (1973-06-01), Yamashita
patent: 3874770 (1975-04-01), Shimizu
patent: 4046459 (1977-09-01), Kawamura
patent: 4099850 (1978-07-01), Matsui
patent: 4145117 (1979-03-01), Ikeda

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