Retrofocus lens system

Details Retrofocus lens system Retrofocus lens system

1996-07-11

1998-04-28

Epps, Georgia Y.

Optical: systems and elements

Lens

With field curvature shaping

359753, G02B 300, G02B 1304

Patent

active

057452970

ABSTRACT:
A retrofocus lens system comprises, in order from a large conjugate side: a first lens group having a negative refracting power and including a plurality of lens elements; a second lens group having a positive refracting power; and a third lens group having a positive refracting power. Each of the lens elements of the first lens group has a negative refracting power. Following conditional expressions (1) to (3) are satisfied:

REFERENCES:
patent: 5042929 (1991-08-01), Tanaka et al.
patent: 5278698 (1994-01-01), Iizuka et al.
patent: 5442484 (1995-08-01), Shikama

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