Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
Reexamination Certificate
2005-09-27
2005-09-27
Edun, Muhammad (Department: 2655)
Dynamic information storage or retrieval
Control of storage or retrieval operation by a control...
Mechanism control by the control signal
C369S047530, C369S053100, C369S053110, C369S059110
Reexamination Certificate
active
06950377
ABSTRACT:
An information recording method of recording information, in which laser light is applied to a recording medium while depending on predetermined information said laser light is modulated and the intensity of said light is controlled to form recording mark areas at which reflectivity of said recording medium changes, depending on the intensity of said applied light, whereinbefore starting data recording, said light is applied to said recording medium at predetermined light intensity, reflection light from said recording mark areas of said recording medium is received, the amount of said reflection light is detected, and a light intensity controlling reference value is calculated on the basis of the amount of said detected light, andduring data recording, reflection light from said recording mark areas of said recording medium is received, the amount of said reflection light is detected, and a light intensity controlling detection value is calculated on the basis of the amount of said detected light, corrected light intensity is obtained from the difference between said light controlling intensity reference value and said light intensity controlling detection value, said light intensity controlling reference value is corrected depending on said corrected light intensity, and the intensity of said laser light is controlled so that said corrected light intensity controlling reference value substantially coincides with said light intensity controlling detection value.
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PCT Search Report for Application No. PCT/JP02/06345 dated Oct. 9, 2002.
English Translation Form PCT/ISA/210.
Imura Masaharu
Kai Tsutomu
Matsuura Takumi
Edun Muhammad
Matsushita Electric Industial Co., Ltd.
RatnerPrestia
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