Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
Reexamination Certificate
2006-09-05
2006-09-05
Edun, Muhammad (Department: 2627)
Dynamic information storage or retrieval
Control of storage or retrieval operation by a control...
Mechanism control by the control signal
C369S116000, C369S059110, C369S047360
Reexamination Certificate
active
07102969
ABSTRACT:
A reproduction method for a multi-level optical recording medium according to the present invention rotates an optical recording medium, on which recording data has been recorded according to a multi-level recording method which sets several levels for light reflectivity of virtual recording cells, emits a reproduction laser beam towards the optical recording medium, and reproduces the recording data based on an electric signal generated in accordance with a received level of reflected light, the method setting the emission power of the reproduction laser beam in a range of 1.0 mW to 2.5 mW inclusive when the optical recording medium is rotated at a linear velocity in a range of 9 m/s to 25 m/s inclusive. By doing so, it is possible to improve the read accuracy for recording data while suppressing the reproduction deterioration of the optical recording medium to a level where deterioration effectively does not occur.
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English Language Abstract of JP 2001-084591.
English Language Abstract of JP 2001-184647.
English Language Abstract of JP 2001-184648.
English Language Abstract of JP 2001-184649.
English Language Abstract of JP 2002-025114.
English Language Abstract of JP 2002-083424.
English Language Abstract of JP 2002-083425.
English Language Abstract of JP 2002-083426.
English Language Abstract of JP 2002-083427.
English Language Abstract of JP 2002-083428.
English Language Abstract of JP 2002-083445.
English Language Abstract of JP 2002-083446.
English Language Abstract of JP 2002-117539.
English Language Abstract of JP 2002-117540.
English Language Abstract of JP 2002-117545.
Arioka Hiroyuki
Fukuzawa Narutoshi
Horai Takashi
Inoue Motohiro
Take Hiroshi
Edun Muhammad
TDK Corporation
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