Retrofocus type super wide angle lens system

Details Retrofocus type super wide angle lens system Retrofocus type super wide angle lens system

1981-10-30

1984-03-13

Corbin, Joan K.

350439, G02B 964, G02B 1304

Patent

active

044363826

ABSTRACT:
Retro-focus type super wide angle lens system comprising a first positive meniscus lens component having the convex surface on the object side, a second negative meniscus lens component having the convex surface on the object side, a third negative meniscus lens component having the convex surface on the object side, a fourth positive lens component, a fifth negative meniscus lens component, a sixth positive cemented lens component, a seventh negative cemented lens component, an eighth positive meniscus lens component having the convex surface on the object side, a ninth positive lens component, and a filter disposed between the fifth and sixth lens components. In this lens system, aberrations are well corrected.

REFERENCES:
patent: 3981563 (1976-09-01), Nakamura
patent: 4061421 (1977-12-01), Nakagawa
patent: 4183625 (1980-01-01), Tsunashima

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