Light image space frequency component extracting device

Details Light image space frequency component extracting device Light image space frequency component extracting device

1979-11-28

1981-09-22

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250209, G01U 120

Patent

active

042912245

ABSTRACT:
This invention discloses a device for extracting the space frequency component of an image formed by an optical system. The device comprises means having a photoelectric element array including a plurality of photoelectric elements on which said image is projected and time-sequentially generating, at a predetermined period, a pulse output having a magnitude corresponding to the intensity of light received by each of the photoelectric elements, means for successively storing the respective pulse outputs, means for converting each of the stored pulse outputs into an AC signal, and means for adding together the AC signals and producing the same.

REFERENCES:
patent: 4133606 (1979-01-01), Hosoe et al.
patent: 4189232 (1980-02-01), Asano et al.
patent: 4218119 (1980-08-01), Schickedanz

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