Optical disc recording device using basic recording information and projection time control
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United States of America Patent
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Mar 26, 1996
Grant Date -
N/A
app pub date -
Aug 5, 1994
filing date -
Aug 9, 1993
priority date (Note) -
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status (Latency Note)
Importance
Abstract
An optical disc recording device includes a control information memory storing a plurality of control information concerning a laser modulation system used during a recording mode for plural types of discs and a recording control circuit for inputting information of the disc type of a disc-on which recording is to be made, reading out information corresponding to the input information from the memory and carrying out contents of a control designated by the control information to achieve recording. In one aspect of the invention, for forming pits of recording pit lengths of 3T to 11T on a CD-WO optical disc using a phthalocyanine dyestuff as a recording material, the recording control circuit includes a projection time control circuit for controlling projection time of recording laser beam with respect to a pit length nT of a pit to be formed to (n-J)T-.alpha.(nT) where n is 3 to 11 j is a constant and .alpha.(3T).gtoreq..alpha.(4T).gtoreq..alpha.(5T).gtoreq.. . . .gtoreq..alpha.(11T) .alpha.(3T).gtoreq..alpha.(11T).
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