| 摘要 |
PURPOSE:To attain high-speed read/wire of information by adopting the constitution that a multi-point layer array is used as a light source and the information bit on an optical card is made coincident. CONSTITUTION:Many beams from a laser array 1 are stopped via lenses 2, 4 on one line of recording medium 6 on the optical card 5 corresponding to one to one. The reflected light is formed on a photodetector array 8 via a beam splitter 3. The laser light makes the guide track 61 of the medium 6 incident on the marker 62, the deviation is detected by the detector 8 and a card moving mechanism 9 applies fine adjustment. Thus, a multi-point light source is used to record/reproduce/erase information at once and high-speed read/write is attained. |
