Apparatus for detecting the in-focusing conditions

Details Apparatus for detecting the in-focusing conditions Apparatus for detecting the in-focusing conditions

1979-10-31

1982-02-02

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250204, G01J 120

Patent

active

043141501

ABSTRACT:
An apparatus for detecting the in-focusing conditions for use in an optical machinery such as cameras, microscopes or endoscopes is disclosed. The apparatus comprises a light receiver arranged with an angle of inclination against an image surface of an optical system and consisting of a plurality of charge transfer elements aligned as a picture element array; means for deriving illuminance signals from the picture element array of the light receiver and means for treating the illuminance signals to detect the in-focused position of the optical system.

REFERENCES:
patent: 3857031 (1974-12-01), Sinclair et al.
patent: 3967110 (1976-06-01), Rogers et al.
patent: 4203031 (1980-05-01), Kamachi et al.

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