Photo metering device for single lens reflex camera

Details Photo metering device for single lens reflex camera Photo metering device for single lens reflex camera

1982-03-25

1984-03-20

Adams, Russell E.

G03B 700

Patent

active

044377460

ABSTRACT:
In the disclosed device, light radiated from an object image formed on the focal plane by an objective lens is directed to a photo-cell using a condenser lens. The condenser lens has reflection areas formed in portions of the surfaces thereof. According to an embodiment, the surface closer to the oncoming light is mirrored at the central portion and the more remote surface is mirrored marginally. In another embodiment, the more remote area is recessed to receive the photo-cell.

REFERENCES:
patent: 4170410 (1979-10-01), Sekida et al.
patent: 4174894 (1979-11-01), Fukuhara et al.
"Nijborg Schmidt-Cassegrain Telescope", Sky and Telescope, Nov. 1976, pp. 382-385.

Affiliated with

Also associated with

Rating

Photo metering device for single lens reflex camera does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Photo metering device for single lens reflex camera, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photo metering device for single lens reflex camera will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1600889