Photoelectric conversion apparatus for focus detection

Details Photoelectric conversion apparatus for focus detection Photoelectric conversion apparatus for focus detection

1988-03-11

1989-09-26

Perkey, W. B.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

250201, 250578, G03B 300

Patent

active

048704415

ABSTRACT:
A photoelectric conversion apparatus for focus detection includes a monitor photoelectric transducer element which produces a voltage corresponding to a charge storage produced by photoelectric transducer elements in accordance with a distribution of light brightness of an object being photographed. An output voltage from the monitor transducer element is compared against a reference voltage at a given time interval after the initiation of the charge storage. If a result of the comparison indicates that an output voltage from the monitor transducer element reaches the reference voltage, the output from the photoelectric transducer elements is directly used in the focus detection. When the output of the monitor transducer element does not reach the reference voltage, the output from the photoelectric transducer element is fed to an amplifier after the time interval, and an output from the amplifier is used in the focus detection.

REFERENCES:
patent: 4550993 (1985-11-01), Taniguchi et al.

Affiliated with

Also associated with

Rating

Photoelectric conversion apparatus for focus detection does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Photoelectric conversion apparatus for focus detection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photoelectric conversion apparatus for focus detection will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-190363