| 摘要 |
PROBLEM TO BE SOLVED: To eliminate an offset due to temperature drift in information recording. SOLUTION: The LD driving device 10 controls the driving current for LD 2 based on the changes of monitor signal level corresponding to the light emitting power level of the LD 2 so that the light emitting power of LD 2 may remain constant, turns out the LD 2 for a fixed time during recoding on an optical disk under the control of CPU 1 and adjusts an offset produced in the LD driving device 10 while the LD 2 turned out. |
