Focus state detection method and apparatus with selective statis

Details Focus state detection method and apparatus with selective statis Focus state detection method and apparatus with selective statis

1985-08-09

1987-12-29

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250204, 354406, G01N 120

Patent

active

047162821

ABSTRACT:
A method and apparatus for detecting the focus state of an object image pattern in accordance with a plurality of photo-electrically converted output signals, including a first mode in which the plurality of photo-electrically converted output signals are sampled at different times and statistically processed for each output, wherein the focus state is detected in accordance with the statistically processed outputs, and a second mode for detecting the focus state without the statistical processing.

REFERENCES:
patent: 4523829 (1985-06-01), Eguchi et al.
patent: 4584656 (1986-04-01), Sakai et al.

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