Rear conversion lens

Details Rear conversion lens Rear conversion lens

1978-07-27

1980-06-10

Clark, Conrad J.

350220, 350216, 350214, G02B 1502, G02B 934, G02B 960

Patent

active

042069718

ABSTRACT:
A rear conversion lens comprises a divergent forward lens group comprising three components and a divergent rearward lens group comprising two components. The three components forming the forward lens group are, in order from the object side, a biconvex positive lens, a biconcave negative lens with its more curved surface facing the image side, and a positive lens with its more curved surface facing the object side. The two components forming the rearward lens group are, in order from the object side, a biconcave negative lens with its more curved surface facing the image side and a biconvex positive lens with its more curved surface facing the object side.

REFERENCES:
patent: 3877796 (1975-04-01), Yabe et al.
patent: 4129359 (1978-12-01), Momiyama
patent: 4154508 (1979-05-01), Nakamura

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