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Document Type and Number:
Japanese Patent JPH041409
Kind Code:
B2
Abstract:
An overlay recording prevention device for an optical disc apparatus detects a signal corresponding to a recording pit of a recorded track. This signal is detected from a photoelectric signal of an optical head (13) when a tracking error occurs in the recording mode and a beam spot is shifted onto an already-recorded track. A high-level recording laser beam is stopped in response to this detection signal.

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Inventors:
YOKOTA MASAFUMI
NAKAGAWA AKIRA
Application Number:
JP4059282A
Publication Date:
January 13, 1992
Filing Date:
March 15, 1982
Export Citation:
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Assignee:
TOKYO SHIBAURA ELECTRIC CO
International Classes:
G11B7/00; G11B7/0045; G11B19/04; G11B27/36



 
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