Method for controlling the recording conditions for a second mark using previously determined reproducing conditions for a first mark for optical memory device
AssigneeSharp Kabushiki Kaisha
InventorHiroshi Fuji
Life of this patent
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Abstract
A recording conditions controlling method for an optical memory device of the present invention includes the steps of: a reproducing condition controlling step for projecting light on an optical recording medium on which information is recorded and measuring a reproducing signal read so as to control a recording condition optimum; and a recording condition controlling step for controlling a recording condition in accordance with the reproducing condition thus optimized. This prevents destruction of an optical disk by heat, which occurs when the heat capacity of the optical disk is small and/or when the environment temperature is high, thus realizing a stable control of recording light quantity.
Claims28
A recording conditions controlling method, comprising the steps of:
- (a) controlling a reproducing condition in accordance with a reproducing signal read from a first mark of an optical recording medium so as to determine an optimum reproducing condition which minimizes an error rate of reproducing data;
- and
- (b) recording a second mark by controlling a recording condition under the optimum reproducing condition and determining a recording condition which maximizes an amplitude of a reproducing signal from the second mark so as to record information on the optical recording medium in accordance with the recording condition thus determined.
A recording conditions controlling method for an optical memory device, comprising the steps of:
- a reproducing condition controlling step for projecting light on an optical recording medium on which information is recorded and measuring a reproducing signal read so as to control a reproducing condition optimum;
- and
- a recording condition controlling step for controlling a recording condition under the reproducing condition optimized.
A recording conditions controlling method, comprising the steps of:
- determining an optimum reproducing condition based on a signal quantity which is obtained by projecting light of varying power on an optical recording medium on which information is recorded;
- recording information on the optical recording medium by varying a recording condition;
- obtaining a reproduced signal from a recorded pattern under the optimum reproducing condition;
- and
- determining a recording condition based on the reproduced signal.
A recording condition controlling method for an optical recording device, the method comprising:
- (1) projecting light on an optical recording medium on which information is recorded, so as to measure a first quality value of a read-out reproduced signal;
- (2) controlling an optimum reproducing condition based on the first quality value;
- (3) setting a predetermined plurality of recording conditions by varying light quantity of a light beam or intensity of an externally applied magnetic field;
- (4) recording a test recording pattern on the optical recording medium;
- (5) reading the test recording pattern based on the reproducing condition which was obtained in said step (2) so as to measure a second quality value of a reproduced signal;
- (6) relationally storing the recording conditions and the second quality value;
- and
- (7) deciding a recording condition based on the stored second quality value.
Dependencies are inferred from the claim text.