Wide angle objective

Details Wide angle objective Wide angle objective

1974-07-29

1978-07-11

Sacher, Paul A.

G02B 964

Patent

active

040998495

ABSTRACT:
This disclosure relates to a Wide Angle Lens of the retrofocus type having a new lens group arrangement which comprises from the object end to the image end a first negative group, a second negative group in the form of a meniscus having a concave image side surface, a third positive group having a convex object side surface, a fourth positive group having a convex image side surface, a fifth negative group, and a sixth positive group having convex image and object side surfaces.

REFERENCES:
patent: 3033082 (1962-05-01), Merigold
patent: 3277784 (1966-10-01), Hudson
patent: 3507559 (1970-04-01), Mori
patent: 3583791 (1971-06-01), Mori
patent: 3832037 (1974-08-01), Nakagawa
patent: 3856385 (1974-12-01), Takahashi
patent: 3870402 (1975-03-01), Takahashi et al.
patent: 3975090 (1976-08-01), Lawson

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