Apparatus for generating a signal providing information regardin

Details Apparatus for generating a signal providing information regardin Apparatus for generating a signal providing information regardin

1985-12-20

1987-12-01

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250351, 250353, 250232, 356141, G05D 108

Patent

active

047106190

ABSTRACT:
Information regarding an object, especially brightness information, is obned by scanning the object with an optical scanner, especially an infrared scanner to provide a respective analog signal. The analog signal is produced by passing the received radiation past a chopper disk onto a detector through a secondary optical assembly. The output signal of the detector is digitized and supplied to a fast Fourier transformation processor which also receives a counting signal derived from the oscillation of the chopper disk. The system may be used, for example, for obtaining deviation and/or presence signals regarding the orientation of an earth satellite relative to the center of the earth.

REFERENCES:
patent: 3162764 (1964-12-01), Haviland
patent: 3610761 (1971-10-01), Cudmore et al.
patent: 3936629 (1976-02-01), Desvignes
patent: 3952208 (1976-04-01), Desvignes et al.
patent: 3981588 (1976-09-01), Wirtanen

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