Focus detecting apparatus provided with a plurality of detecting

Details Focus detecting apparatus provided with a plurality of detecting Focus detecting apparatus provided with a plurality of detecting

1988-12-09

1990-09-04

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

354406, G01J 120, G03B 300

Patent

active

049547011

ABSTRACT:
An apparatus for detecting the focus-adjusted state of an objective lens comprises a plurality of juxtaposed units each having a lens assembly for receiving light fluxes passed through different areas of the pupil of the objective lens and forming light intensity distributions whose relative position varies in conformity with the focus-adjusted state of the objective lens, and a plurality of photoelectric sensor arrays arranged in a direction orthogonal to the direction in which the areas are arranged for receiving the light intensity distributions and forming a signal indicative of the focus-adjusted state of the objective lens on the basis of the relative position of the light intensity distributions.

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