Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1997-02-14
1998-12-01
Allen, Stephone B.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
2502061, 244164, 701 4, 701 13, G01J 120
Patent
active
058442324
ABSTRACT:
This sensor, which is connected to an attitude control system comprising a coarse attitude detector on a mobile craft, has an array of photodetectors (1) and a slit (3) interposed between the array and the sun. According to the invention, it comprises a sun sensor having a plurality of parallel slits (3, 4, 5), each slit detecting a sector (C.sub.1, A, C.sub.2) of the overall field of view for a first angular position of the sun to be measured, with a small overlap between adjacent sectors. Said sun sensor further comprises calculation means (31) which receive, on the one hand, information about the insolation of the array and, on the other hand, information originating from the attitude control system (inertial unit 32), in combination with the date, indicating in which sector of the field of view the sun is situated, and which derive from said information the angular position of the sun in said overall field of view.
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Allen Stephone B.
U.S. Philips Corporation
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