Auto focus detecting device comprising both phase-difference det

Details Auto focus detecting device comprising both phase-difference det Auto focus detecting device comprising both phase-difference det

1996-01-02

1997-01-28

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

2502018, 396125, G03B 1300

Patent

active

055979998

ABSTRACT:
An auto focus detecting device capable of focus detection by a contrast detecting method and a phase-difference detecting method. In accordance with a condition of an object, either one of detecting method is selected, and then an amount of defocus is calculated based on a result obtained by the selected detecting method.

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