Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1980-09-11
1982-11-16
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
358342, H04N 576
Patent
active
043596355
ABSTRACT:
Device for scanning and following information tracks, for use in conjunction with "VLP" or "Compact Disk", tracking errors being mitigated by deriving an additional control voltage from the envelope of the information, which counteracts positional deviations of the information transducer relative to a desired track on the information carrier to an increased extent.
REFERENCES:
patent: 3854015 (1974-12-01), Janssen
Briody Thomas A.
Hostetter Darwin R.
Mayer Robert T.
Nelms David C.
Tamoshunas Algy
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