Focus detecting method and apparatus

Details Focus detecting method and apparatus Focus detecting method and apparatus

1984-02-08

1986-12-02

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250204, G01J 120

Patent

active

046266747

ABSTRACT:
A focus detecting method and its apparatus arranges two rows of photoelectric transducer elements in positions optically equivalent to plane position which are located before and behind a presumed focal plane of an image forming optical system, respectively, divide a light beam into a first light beam passing through a first half portion of an exit pupil and a second light beam passing through a second half portion of the exit pupil by a shift generating optical system, primarily receive one of said first and second light beams on at least one of said first and second rows of transducer elements and primarily receive the other of said first and second light beams on at least the other of said first and second rows and performs a focus detection based on shift or displacement of images which is caused by said first and the second light beams on said first and second rows of transducer elements.

REFERENCES:
patent: 4341953 (1982-07-01), Sakai et al.

Affiliated with

Also associated with

Rating

Focus detecting method and apparatus 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 method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Focus detecting method and apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2293961