Focus detecting device in a single lens reflex camera

Details Focus detecting device in a single lens reflex camera Focus detecting device in a single lens reflex camera

1982-02-01

1984-03-13

Perkey, William B.

354152, G03B 300, G03B 1912

Patent

active

044363958

ABSTRACT:
In a focus detecting device in a single lens reflex camera including a main reflecting mirror capable of partly transmitting incident light therethrough disposed in a light-passing shaft formed by a mirror box provided between an objective lens and a film surface to direct a light beam passed through the objective lens to a viewfinder optical system, and an auxiliary reflecting mirror for reflecting the light transmitted through the main reflecting mirror toward a predetermined wall surface of the mirror box lying at a location opposed to the viewfinder optical system with the main reflecting mirror interposed therebetween, there are provided reflecting means having first and second reflecting surfaces for separating the light reflected by the auxiliary reflecting mirror into two mutually opposed directions substantially orthogonal to the optical axis of the objective lens along said predetermined wall surface, first and second photoelectric converter means provided on the optical paths of the light beams separated by the first and second reflecting surfaces, and a pair of re-imaging means disposed in the optical paths leading from the auxiliary reflecting mirror to the first and second photoelectric converter means for forming a first image and a second image on the first and second photoelectric converter means from the image formed by the objective lens.

REFERENCES:
patent: 3601027 (1971-08-01), Ono
patent: 4159169 (1979-06-01), Sato
patent: 4171154 (1979-10-01), Fukuhara
patent: 4258989 (1981-03-01), Tokutomi et al.
patent: 4314748 (1982-02-01), Kawabata et al.

Affiliated with

Also associated with

Rating

Focus detecting device in a 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 Focus detecting device in a single lens reflex camera, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Focus detecting device in a single lens reflex camera will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-489443