Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1985-10-30
1987-08-18
LaRoche, Eugene R.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
250230, 330308, G01J 132
Patent
active
046879200
ABSTRACT:
An electronic circuit for determining the position of a light spot produced by a light source (4, 22) on a position-sensitive detector (4,22) having a center terminal (2) and two end terminals (3, 3'). Circuitry is provided for keeping the current (I) applied to the center contact of the position-sensitive detector at a constant level, which circuitry includes means (9) for measuring the current and means (10-18) for compensating for variations in this current by controlling the luminous intensity of the light source (1, 25).
REFERENCES:
patent: 3453528 (1969-07-01), Gall
patent: 3828188 (1974-08-01), Matula
patent: 4260882 (1981-04-01), Barnes
B.V. Optische Industrie "De Oude Delft"
LaRoche Eugene R.
Marn Louis E.
Mottola S.
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