| 摘要 |
The apparatus records/reproduces information onto/from an optical card (1) by relatively moving the optical card to the optical head. The optical head has an optical system for producing focusing and tracking control signals. The optical system includes a light emitting diode having a narrow slit-like light emitting surface as a light source. The optical system has photo sensitive elements for focusing control, a photo sensitive element for tracking control, and a recorded information reproducing photo sensitive element which are used to detect the reflected lights from the optical card of a slit light which is emitted from the light emitting diode. |
