Self correcting recording reproducing apparatus for an optical c

Details Self correcting recording reproducing apparatus for an optical c Self correcting recording reproducing apparatus for an optical c

1994-05-31

1996-09-24

Psitos, Aristotelis

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4441, G11B 709

Patent

active

055597734

ABSTRACT:
An optical card recording/reproducing apparatus for recording/reproducing information onto/from an optical card by relatively moving the optical card to an optical head is provided. 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. By forming a slit-like light spot onto the optical card, the focusing and tracking controls can be accurately easily executed and the deterioration in pits and track guides is prevented.

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