Photometric optical system for single-lens reflex electronic pho

Details Photometric optical system for single-lens reflex electronic pho Photometric optical system for single-lens reflex electronic pho

1984-12-20

1986-12-02

Rubinson, Gene Z.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358909, H04N 5225

Patent

active

046269185

ABSTRACT:
A portion of the light passing through the compensation filter of a viewfinder optical system is diverted to a photometric member for the purpose of generating a signal representative of the intensity of the light passing through the objective of a single-lens reflex electronic photographic camera. Preferably, the compensation filter is constructed as a beam splitter; the adjoining flat surfaces of two pieces of optical material are cemented together by a material that forms a semi-transmissive coating therebetween.

REFERENCES:
patent: 3710699 (1973-01-01), Mitani
patent: 4172646 (1979-10-01), Matsumoto
patent: 4366501 (1982-12-01), Tsunekawa et al.

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