OPTICAL DISK DEVICE AND OPTICAL DISK

摘要

PURPOSE: To effectively avert the intermodulation distortion between a first information signal and a second information signal by recording the first information signal by a first laser beam modulated by the first information signal on an optical disk and recording the second information signal by a second laser beam modulated by this secod information signal on the optical disk. CONSTITUTION: A first laser diode modulation circuit 34 of an optical disk device 30 is inputted with the frequency modulation signal S4 outputted from a frequency modulation circuit FMOD and drives the first laser diode of an optical pickup 32. A second laser diode modulation circuit 38 drives the second laser diode of the optical pickup 32 in accordance with the output signal of a mixer 36. As a result, the circuit 38 intermittently rises the light quantity of the second laser beam projected from the recond laser beam to the quantity of the writing light from the light quantity at the time of reproduction to follow up the rise of the output signal of the mixer 36. A video signal S2 and other signal are discretely recorded to avert the intermodulation distortions in the device 30.