Fish eye lens system

Details Fish eye lens system Fish eye lens system

1982-05-19

1985-06-25

Corbin, John K.

350436, G02B 960, G02B 962

Patent

active

045250383

ABSTRACT:
A high performance medium speed fish eye lens system is provided capable of compensating all aberrations except the distortion up to an aperture ratio of 1:4. The lens system includes a first negative meniscus shaped lens convex to the object, a second negative lens curved towards the object, a third positive lens curved towards the object, an aperture stop, a fourth positive lens curved towards the image and a fifth meniscus shaped negative lens convex to the image. The fourth and the fifth lens are close together or cemented. An optical filter can be inserted between the third and the fourth lens.

REFERENCES:
patent: 3734600 (1973-05-01), Shimizu
patent: 4256373 (1981-03-01), Horimoto

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