Optical disc signal reproducing system with tilt immunization

Details Optical disc signal reproducing system with tilt immunization Optical disc signal reproducing system with tilt immunization

1982-06-30

1985-02-26

McElheny, Jr., Donald

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

G11B 700

Patent

active

045021341

ABSTRACT:
An optical signal reproducing system uses laser light reflected from a recording disc track 12 to recover signals stored in pits 13 separated by lands. The differential output of the reflected light only when the focused beam is incident on pits is used to control lateral tracking offset correction in a negative feedback mode, thereby immunizing the system from false tracking correction due to light reflected from lands when the disc is tilted from the optical axis.

REFERENCES:
patent: 4243848 (1981-01-01), Utsumi
patent: 4338682 (1982-07-01), Hosaka et al.
patent: 4406000 (1983-09-01), Shoji et al.
patent: 4414655 (1983-11-01), Shoji et al.

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