Automatic focusing apparatus

Details Automatic focusing apparatus Automatic focusing apparatus

1991-08-05

1992-09-29

Perkey, W. B.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

2502012, G03B 1336

Patent

active

051517329

ABSTRACT:
An automatic focussing apparatus having a plurality of sensors of the signal accumulation type includes a plurality of accumulation-type sensor sections for respectively receiving light from different object areas. Each sensor section produces, in response to a first signal, a signal which is variable in accordance with an amount of light received thereby. The signal produced by each sensor section is independently output to a signal processing circuit through an output terminal portion in response to a second signal. A control circuit supplies the first signal to each sensor section substantially at the same time, and monitors a signal producing state of each sensor section independently. The control circuit then supplies the second signal to the sensor section which reaches a predetermined monitoring state.

REFERENCES:
patent: 4329577 (1982-05-01), Asano et al.
patent: 4460261 (1984-07-01), Equchi et al.
patent: 4701626 (1987-10-01), Ishizaki et al.
patent: 4831403 (1989-05-01), Ishida et al.

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