| 摘要 |
PROBLEM TO BE SOLVED: To provide an information processor with a simple constitution capable of being manufactured at a low cost and stably recording/reproducing information. SOLUTION: The information processor is provided with an optical head 1 arranged oppositely to an optical disk 3. The optical head 1 is provided with a laser detector unit 10 provided with a semiconductor laser 2, a photodetector 4 for a reproducing signal and the photodetector 6 for a monitor signal set in nearly the same plane close to each other. A diffraction optical element 12, a collimate lens 14, an aperture diaphragm 16, a correction prism 18 and a condenser leans 20 are provided on the optical path of the semiconductor laser 2. A reflection surface 18a provided on the correction prism 18 is arranged tilted at a prescribed angle to the surface orthogonally intersecting the optical axis of the semiconductor laser 2, and a reflected light beam is converged by the collimate lens 14 to be converged on the photodetector 6 for the monitor signal. |
