Photographic lens system

Details Photographic lens system Photographic lens system

1981-02-18

1984-07-03

Corbin, John K.

350438, 350467, 350469, G02B 934, G02B 960

Patent

active

044575939

ABSTRACT:
The photographic lens system disclosed includes a front lens arrangement of positive refractive power with a plurality of components having lens surfaces followed by a diaphragm. A light control includes a number of light absorbing regions on the surface of a component other than the surface adjacent the diaphragm. According to an embodiment, the light control includes a larger optically coaxial region and smaller outer regions surrounding the optically coaxial region. According to another embodiment, a negative refraction lens is arranged behind the diaphragm.

REFERENCES:
patent: 1900966 (1933-03-01), Wolfe
patent: 2356694 (1944-08-01), Potter et al.
patent: 3506341 (1970-04-01), Kazamaki et al.
patent: 3728011 (1973-04-01), Mori
patent: 4124276 (1978-11-01), Okano et al.
patent: 4264138 (1981-04-01), Imai

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