Retrofocus wide-angle objective lens system of large relative ap

Details Retrofocus wide-angle objective lens system of large relative ap Retrofocus wide-angle objective lens system of large relative ap

1975-06-13

1976-09-28

Sacher, Paul A.

350176, 350207, G02B 964

Patent

active

039828239

ABSTRACT:
A retrofocus wide-angle objective lens having a range of at least 75.degree. with a large relative aperture and which is corrected for various aberrations and particularly curvature of field at the outer portions of the viewing field.

REFERENCES:
patent: 3884556 (1973-05-01), Nakagawa

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