Photographic lens system with a short overall length

Details Photographic lens system with a short overall length Photographic lens system with a short overall length

1984-01-04

1986-08-19

Corbin, John K.

350469, G02B 1308, G02B 934

Patent

active

046066071

ABSTRACT:
A photographic lens system with a short overall length comprising a first, second, third and fourth lens components, in which the first lens component is a positive meniscus lens, the second lens component is a biconcave lens, the third lens component is a biconvex lens, and the fourth lens component is a negative meniscus lens, and in which at least one of respective surfaces of the first, second and third lens components and at least one of respective surfaces of the fourth lens component are arranged as aspherical surfaces, the photographic lens system having a large aperture ratio and well corrected aberrations.

REFERENCES:
patent: 3951523 (1976-04-01), Nishimoto
patent: 3998527 (1976-12-01), Ikeda et al.
patent: 4359271 (1982-11-01), Mihara
patent: 4368956 (1983-01-01), Yamada et al.
patent: 4373786 (1983-02-01), Yamada
patent: 4413888 (1983-11-01), Sato
patent: 4443069 (1984-04-01), Mihara
patent: 4521084 (1985-06-01), Kurihara

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