Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1986-03-31
1988-06-07
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
250201, 250211J, G01J 120
Patent
active
047498498
ABSTRACT:
In a position-sensitive radiation detector having a semiconductor body which at least in the operating condition comprises a high-ohmic zone (11) between two radiation-sensitive diodes (6) provided with connection electrodes (9), a high-ohmic zone (11) between two semiconductor zones (6) provided with connection electrodes (9), can be apparently centered by varying the voltages at the connection electrodes (9) in such a manner that the photocurrents through the diodes (6) are the same. The signals derived therefrom can be supplied to measuring and control systems for, for example, optical reading and writing apparatus and other measuring apparatus.
REFERENCES:
patent: 4533826 (1985-08-01), van Alem
patent: 4629882 (1986-12-01), Matsuda et al.
Brat, J. J. M. et al, "Optical Video Disks with Undulating Tracks," Applied Optics, vol. 17, No. 13, pp. 2022-2028, (Jul. 1, 1978).
Hoeberechts Arthur M. E.
Noorlag Date J. W.
Allen Stephone B.
Briody Thomas A.
Haken Jack E.
Nelms David C.
U.S. Philips Corp.
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