Roughened shutter curtain(s) for single lens reflex camera

Details Roughened shutter curtain(s) for single lens reflex camera Roughened shutter curtain(s) for single lens reflex camera

1977-07-12

1979-08-14

Gonzales, John

354 56, 354 59, 354152, 354241, G03B 708, G03B 928

Patent

active

041643682

ABSTRACT:
The shutter curtain surface(s) in a single lens reflex camera on the side facing the lens is roughened, as by sand blasting, to provide more uniform light diffusion and reflective scattering characteristics, whereby the output of a light sensing element disposed in the mirror box facing the shutter provides a more accurate measure of the integrated or averaged light intensity distribution over the entire picture or viewing frame.

REFERENCES:
patent: 2526432 (1950-10-01), Svensson
patent: 3868703 (1975-02-01), Ueda
patent: 4065777 (1977-12-01), Maitani et al.

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