Focusing position detection apparatus

Details Focusing position detection apparatus Focusing position detection apparatus

1979-06-06

1981-07-07

Gellner, Michael L.

354 31, G03B 310

Patent

active

042771560

ABSTRACT:
An improved focusing position detection apparatus is capable of detecting a focusing position speedily by use of a single photoelectric conversion element array. The photoelectric conversion element array is positioned so that the opposite end portions of the element array are at different distances, physically or optically, from an object and the photoelectric conversion element array is divided into three portions, the opposite end portions and an intermediate portion, and the electric output from each portion of the photoelectric conversion element is analyzed, whereby the moving direction of an optical system for obtaining the focusing position is determined.

REFERENCES:
patent: 4002899 (1977-01-01), Stauffer
patent: 4189232 (1980-02-01), Asano et al.

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