Focusing position detecting device using a sector shaped mirror

Details Focusing position detecting device using a sector shaped mirror Focusing position detecting device using a sector shaped mirror

1983-09-06

1986-04-01

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250204, G01J 120

Patent

active

045800421

ABSTRACT:
A relay optical system used for focus detection including an optical lens system for forming the image of the exit pupil of a photographing lens, all or a part of said lens optical system for forming a secondary image of an image which is formed on a focusing plane by the photographing lens and a reflecting mirror provided in a plane where the image of said exit pupil is formed. The reflecting mirror is made up of a plurality of reflecting mirror portions which are obtained by dividing the reflecting mirror. The mirror portions divide the image of the exit pupil and have different optical axes, so that an image formed by the photographing lens is formed into secondary images the number of which is equal to the number of mirror parts. Sensor arrays are provided to receive the secondary images, respectively, to detect focusing from correlation of the images.

REFERENCES:
patent: 3622797 (1971-11-01), Bragg
patent: 3860935 (1975-01-01), Stauffer
patent: 4083056 (1978-04-01), Nakamura et al.
patent: 4405232 (1983-09-01), Mansell

Affiliated with

Also associated with

Rating

Focusing position detecting device using a sector shaped mirror does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Focusing position detecting device using a sector shaped mirror, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Focusing position detecting device using a sector shaped mirror will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1086147