Optical system for indication in the viewfinder of single-lens r

Details Optical system for indication in the viewfinder of single-lens r Optical system for indication in the viewfinder of single-lens r

1976-10-20

1978-10-03

Hix, L. T.

354289, G03B 1912

Patent

active

041187229

ABSTRACT:
The disclosure describes a compact and inexpensive optical system to be built in the viewfinder of a single-lens reflex camera for reading, in the viewfinder, an optical image of an indication element provided on the outside of the viewfinder. The optical system comprises a pentagonal Dach-prism having a light transmitting portion provided thereon, a first reflecting member and a second reflective member. The first and second reflective members have a specific positional relation to each other and also relative to the light transmitting portion of the prism so that an information carrying light beam coming from the indication element may reach the eyepiece of the viewfinder along a shortest possible light path.

REFERENCES:
patent: 3094911 (1963-06-01), Reiche et al.
patent: 3174416 (1965-03-01), Heerklotz
patent: 3656421 (1972-04-01), Ataka
patent: 3675558 (1972-07-01), Kuramoto et al.
patent: 3978502 (1976-08-01), Okuno et al.

Affiliated with

Also associated with

Rating

Optical system for indication in the viewfinder of single-lens r does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical system for indication in the viewfinder of single-lens r, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical system for indication in the viewfinder of single-lens r will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1804862