Information indicating device in a camera viewfinder

Details Information indicating device in a camera viewfinder Information indicating device in a camera viewfinder

1975-05-30

1977-05-03

O'Connor, Edna M.

354 54, 354155, G03B 1302, G03B 1912

Patent

active

040218309

ABSTRACT:
An information indicating device for a viewfinder of a single lens reflex camera using a pentaprism is disclosed. The device includes a thin, substantially triangular shaped prism element having a shape similar to the shape at a side face of the pentaprism to which it is attached. A second thin prism element is attached to the external surface of the third reflection face of the pentaprism. Light information obtained from a part of the triangular prism is transmitted to the second thin prism element and then introduced into the pentaprism through a transparent slot formed in the third reflection face of the pentaprism.

REFERENCES:
patent: 3128684 (1964-04-01), Trankner et al.
patent: 3387530 (1968-06-01), Ebertz
patent: 3657985 (1972-04-01), Uno
patent: 3757656 (1973-09-01), Kuramoto
patent: 3828644 (1974-08-01), Uchida
patent: 3840298 (1974-10-01), Okuno

Affiliated with

Also associated with

Rating

Information indicating device in a camera viewfinder does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Information indicating device in a camera viewfinder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Information indicating device in a camera viewfinder will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-349418