Focus detecting apparatus including movement of detecting zones

Details Focus detecting apparatus including movement of detecting zones Focus detecting apparatus including movement of detecting zones

1993-10-28

1995-05-30

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250204, 356363, 354404, G01J 120

Patent

active

054204380

ABSTRACT:
A focus detecting apparatus is provided including an image reforming optical system which splits a bundle of rays incident upon a detecting zone, which is provided on a predetermined focal surface, and reforms an image. The predetermined focal surface is substantially conjugate with a focal plane of a taking lens. The focus detecting apparatus further includes a line sensor which receives the reformed image, a detector which detects a focus state of the taking lens in accordance with an output of the line sensor, and a driver which moves the detecting zone on the predetermined focal surface.

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