Real-time light-measuring system for single-lens reflex cameras

Details Real-time light-measuring system for single-lens reflex cameras Real-time light-measuring system for single-lens reflex cameras

1985-04-17

1987-01-06

Griffin, Donald A.

Facsimile and static presentation processing

Facsimile

Recording apparatus

H04N 5238

Patent

active

046351256

ABSTRACT:
A light-measuring system for single-lens reflex cameras wherein the light coming from an object to be photographed as reflected at the image-pickup surface is reflected once again by a partially reflecting means disposed in the photographing light path, so that this latter reflection light is measured on its own optical axis, to enable to perform the real-time measurement of light with a high precision.

REFERENCES:
patent: 3086077 (1963-04-01), Mayer
patent: 3385190 (1968-05-01), Sho et al.
patent: 3451324 (1969-06-01), Miyauchi
patent: 4152054 (1979-05-01), Leiter
patent: 4556912 (1985-12-01), Yamanaka et al.

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