Information writing device

Details Information writing device Information writing device

2006-11-14

2006-11-14

Korzuch, William (Department: 2627)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data clocking

C360S075000

Reexamination Certificate

active

07136241

ABSTRACT:
An information writing device in which the information can be written accurately efficiently and in which variable formats of the disc-shaped recording mediums can be coped with without the necessity of providing master discs from one format of the disc-shaped recording medium to another. A grating interferometer clock scale system is formed by a clock pattern disc50having a clock track52carrying an optically readable clock pattern51and an optical head60for optically reading out the clock pattern51. Clock signals are generated in a clock generator90, to which is transmitted, via an optical fiber80, the interference light obtained as an optical output obtained in turn by optically reading out the clock pattern51by the optical head60, based on electrical signals obtained on photoelectrically transducing the optical output. The servo information synchronized with the clock signals is generated by a servo information generating part93.

REFERENCES:
patent: 5442172 (1995-08-01), Chiang et al.
patent: 6414807 (2002-07-01), Bates et al.
patent: 6504803 (2003-01-01), Matsumoto et al.

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