Fish eye lens system

Details Fish eye lens system Fish eye lens system

1985-06-24

1987-03-03

Corbin, John K.

G02B 934, G02B 960

Patent

active

046471618

ABSTRACT:
A high performance medium speed fish eye lens system is provided, capable of compensating all aberrations except the distortion at an aperture ratio of at least 1:4.2. The lens system consists of a first lens group (G1) of negative refractive power including two negative lenses curved towards the object, a middle positive lens component (G2) curved towards the object, which lens component can be composed of a cemented doublet, and a last lens group (G3) of positive refractive power consisting of a cemented doublet or a cemented doublet and an additional positive single lens both curved towards the image.

REFERENCES:
patent: 3734600 (1973-05-01), Shimizu

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