Apparatus for detecting focus condition of imaging lens having a

Details Apparatus for detecting focus condition of imaging lens having a Apparatus for detecting focus condition of imaging lens having a

1984-02-03

1986-04-01

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

354406, G01J 120

Patent

active

045800430

ABSTRACT:
An apparatus for detecting a focal condition of an imaging lens on the basis of the lateral image shift detection method including a stripe mask array having a plurality of stripe masks arranged radially about an optical axis of the imaging lens at a constant pitch and a light receiving element array having a plurality of light receiving elements arranged radially about the optical axis of the imaging lens in such a manner that two light fluxes transmitted through upper and lower halves of the aperture of the imaging lens are selectively received by alternate light receiving elements belonging to first and second groups, respectively. Two images formed by the two light fluxes are shifted relative to each other in clockwise and counterclockwise directions, respectively, in accordance with a defocus condition.

REFERENCES:
patent: 4246476 (1981-01-01), Stauffer

Affiliated with

Also associated with

Rating

Apparatus for detecting focus condition of imaging lens having a does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for detecting focus condition of imaging lens having a, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for detecting focus condition of imaging lens having a will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1086150