Record carrier body with an optical servo track and optical appa

Details Record carrier body with an optical servo track and optical appa Record carrier body with an optical servo track and optical appa

1980-03-18

1989-09-26

Psitos, Aristotelis M.

Facsimile and static presentation processing

Facsimile

Recording apparatus

369275, 369111, H04N 576, G11B 700

Patent

active

048705080

ABSTRACT:
Disclosed is a system for optically recording information on a disc-shaped record carrier body along an information track, with the write spot being accurately guided in the radial and tangential directions. The record carrier body comprises a servo track formed by a constant and large number of servo areas per revolution of the servo track. In addition to a write spot, the write apparatus also projects a servo spot on the servo track. The tangential speed and the radial position of the servo spot relative to the servo track are determined from the modulated servo beam and used to correct the tangential speed and the radial position of the write spot, which is locked to the servo spot.

REFERENCES:
patent: 3307157 (1967-02-01), Harper et al.
patent: 3337718 (1967-08-01), Harper et al.
patent: 3365706 (1968-01-01), King
patent: 3438050 (1967-04-01), Aschenbrenner
patent: 3510658 (1970-05-01), Rabedean
patent: 3636526 (1972-01-01), Feinleif
patent: 3673412 (1972-06-01), Olson
patent: 3781479 (1973-12-01), Swofoda
patent: 3939302 (1976-02-01), Kihan
patent: 3980818 (1976-09-01), Browning
patent: 4084185 (1978-04-01), DeLang et al.
patent: 4123788 (1978-10-01), Kruger
patent: 4176377 (1979-11-01), Howe
patent: 4363116 (1982-12-01), Kleuters et al.

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