Fish eye lens system

Details Fish eye lens system Fish eye lens system

1978-08-09

1981-03-17

Sacher, Paul A.

350464, 350465, G02B 962

Patent

active

042563739

ABSTRACT:
An improved high speed fish eye lens system is provided capable of compensating for lateral chromatic aberration, field curvature and astigmatism while providing an aperture ratio of F/2.8. The fish eye lens system includes a first lens group of a negative refractive power having two negative meniscus single lenses convex to the object side. A second lens group of a positive refractive power includes a doublet, while a third lens group of a positive refractive power includes at least a positive meniscus single lens convex to the image side and a doublet.

REFERENCES:
patent: 3515462 (1970-06-01), Kazamaki et al.
patent: 3549241 (1970-12-01), Mori
patent: 3597049 (1971-08-01), Ogura
patent: 3601473 (1971-08-01), Mandler et al.
patent: 3734600 (1973-05-01), Shimizu
patent: 3850509 (1974-11-01), Nakagawa
patent: 3877795 (1975-04-01), Yamashita
patent: 3924935 (1975-12-01), Takahashi et al.

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