Retrofocus type lens system having ultra-wide angle of view

Details Retrofocus type lens system having ultra-wide angle of view Retrofocus type lens system having ultra-wide angle of view

1976-06-29

1977-12-06

Clark, Conrad J.

G02B 1304

Patent

active

040614212

ABSTRACT:
A retrofocus type lens system having ultra-wide angle of view comprising a first positive meniscus lens component, a second negative meniscus lens component, a third negative meniscus lens component, a fourth positive lens component, a fifth negative meniscus lens component, a sixth lens component having positive refractive power, a seventh lens component having negative refractive power, an eighth positive meniscus lens component and a ninth positive lens component. Said lens system is so designed as to have a long back focal length and correct distortion, lateral chromatic aberration and so on.

REFERENCES:
patent: 3981563 (1976-09-01), Nakamura

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