Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1992-02-13
1994-03-15
Messinger, Michael
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
250561, 360 7703, G01N 2186, G11B 5596
Patent
active
052947912
ABSTRACT:
A method and apparatus performs the detection of an edge of a tape and further controls the read/write head to position itself relative to the detected edge. An array of photodetectors in an integrated circuit chip senses the intensity of light illuminating the chip with the tape running between the light source and the photodetectors. A light-to-dark transition is formed which is indicative of the edge of the tape.
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Messinger Michael
Tandberg Data A/S
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