Optical head used for recording on optical recording medium havi

Details Optical head used for recording on optical recording medium havi Optical head used for recording on optical recording medium havi

1995-01-19

1998-03-17

Young, W. R.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4423, 369 4427, 369 58, G11B 7095

Patent

active

057295107

ABSTRACT:
An optical head apparatus includes a stationary optical system having a light source and a detector for detecting light reflected by a recording medium, which stationary optical system is arranged at a position fixed to the recording medium. Plural objective lenses for focusing/irradiating light emitted from the light source onto the recording medium are arranged on a rotating blade which is provided to be rotatable in a direction parallel to the recording medium. By controlling the waveform of a current to be supplied to a tracking coil, the blade is rotated and a desired one of the objective lenses is located on an optical axis of the light irradiated onto the recording medium.

REFERENCES:
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patent: 5148421 (1992-09-01), Satoh et al.
patent: 5235581 (1993-08-01), Miyagawa et al.
patent: 5255262 (1993-10-01), Best et al.
patent: 5307336 (1994-04-01), Lee et al.

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