Tracking device

Details Tracking device Tracking device

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

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