Photometric device of through the lens type exposure meter in a

Details Photometric device of through the lens type exposure meter in a Photometric device of through the lens type exposure meter in a

1975-07-22

1977-01-25

Peters, Jr., Joseph F.

354152, G03B 1700

Patent

active

040054411

ABSTRACT:
A photometric device for a through the lens type exposure meter in a single lens reflex camera. The reflecting mirror provides a region transmitting a part of the light rays incident thereon. The light passing through said region is reflected by a reflecting-concentrating member and received by a light receiving member, the surface of which is adjacent to the film and disposed on or in the vicinity of the optical axis of the phototaking lens. The reflecting-concentrating member is disposed to substantially cover the photometry range of the film and the optical axis of the reflecting-concentrating member is substantially coincident with the optical axis of the phototaking lens.

REFERENCES:
patent: 3476028 (1969-11-01), Namba et al.
patent: 3672284 (1972-06-01), Schwarz
patent: 3699864 (1972-10-01), Shimomura
patent: 3842424 (1974-10-01), Tsunikawa et al.

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