Distance-measuring apparatus for camera

Details Distance-measuring apparatus for camera Distance-measuring apparatus for camera

1990-08-20

1991-04-09

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

354403, G01J 120

Patent

active

050067001

ABSTRACT:
A distance-measuring apparatus comprises a first detecting device for detecting a distance to a central portion of an object field corresponding to a photographing frame and generating data corresponding to a detected distance, a second detecting device for detecting distances to a plurality of peripheral portions of the object field except for the central portion and generating data corresponding to detected distances, and an operating device for operating the first and second detecting devices. The oeprating device has a first operation step of operating the first detecting device and a second operation step of operating the second detecting device. The first step is executed to determine the detected distance to the central portion. The execution of the second step depends on the determination result and may produce an average peripheral distance output or a shortest peripheral distance output for driving a phototaking lens. Depending upon the determination result, a central distance output may instead by produced.

REFERENCES:
patent: 4606629 (1986-08-01), Hines
patent: 4764786 (1988-08-01), Tamura

Affiliated with

Also associated with

Rating

Distance-measuring apparatus for 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 Distance-measuring apparatus for camera, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Distance-measuring apparatus for camera will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2036431