| 摘要 |
PURPOSE:To obtain a recorder which realizes a simple and inexpensive reproducer, by adding a reference signal generating means for tracking of information track and a track forming means for tracking of information track, respectively. CONSTITUTION:The beams emitted from a laser beam source 14 enter an optical modulator 26 to receive the modulation equivalent to the TV signal supplied from a TV signal generating source 27 and are supplied to an optical deflector 16. The signal generated from the source 27 is supplied to the deflector 16 utilizing the acoustooptic effect or the electrooptic effect via a synchronous separating circuit 28 and a deflected pulse generating circuit 29. The output beam receives the modulation of frequencies f1 and f2 and is split into two beams with a shift of a minute distance to be condensed on a disk 15 throgh lenses 12 and 13. A track into which the signals of frequencies f1 and f2 alternately is obtained in the horizontal blanking section of the TV signal. The signal for tracking is obtained by a simple process of signal durig the reproduction. Thus a simple and inexpensive reproducer can be obtained. |
