| 摘要 |
PURPOSE: To perform at least good reproducing of plural information recording media having their different specifications respectively even in a small-sized and inexpensive structure of the device. CONSTITUTION: A detecting system for detecting reflected light from an optical disk 10 is provided in a fixed position against the optical disk so as to constitute a stationary optical system 22, while a rotary blade rotatably provided in a plane parallel to a recording surface of the optical disk is arranged with plural objective lenses 14a and 14b for convergently irradiating the optical disk with a light beam emitted from a light source. Then, the rotary blade is rotated by controlling a current waveform to flow into a tracking coil, so that one objective lens suitable for this optical disk is selected, and is fixed on an optical axis of the light beam irradiating the optical disk. |
