Device for extracting a plurality of space frequency components

Details Device for extracting a plurality of space frequency components Device for extracting a plurality of space frequency components

1980-01-03

1981-12-15

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250578, G01J 120

Patent

active

043061435

ABSTRACT:
A device for extracting a plurality of space frequency components from an optical image formed by an image forming optical system comprises a photoelectric element array including at least N photoelectric elements disposed in or near the image formation plane of the image forming optical system, and means for generating, on the basis of the output of each of the photoelectric elements of the array, an electrical output varying in phase in accordance with the displacement of the optical image in the direction of arrangement of the photoelectric elements.

REFERENCES:
patent: 4084907 (1978-04-01), Pinard et al.
patent: 4218623 (1980-08-01), Utagawa

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