Optical recording apparatus employing stacked recording media wi

Details Optical recording apparatus employing stacked recording media wi Optical recording apparatus employing stacked recording media wi

1990-07-23

1993-10-19

LaRoche, Eugene R.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Access of multiple storage elements

369 36, 369283, 369284, 360103, G11B 17028, G11B 724, G11B 712

Patent

active

052552608

ABSTRACT:
The apparatus includes optical recording media each of which includes a single plate substrate with recording layers and spiral grooves formed on both sides of the substrate and which are available for recording and reproduction or for recording, erasing and reproduction via irradiation with laser beams. Both surfaces of the recording media are available for simultaneous access, and a plurality of thin floating-type optical heads are provided to irradiate laser beams onto the recording media. The optical heads are respectively provided at each side of the recording media and float, responsive to rotation of the recording media, above the respective surfaces of the recording media at a distance of at most hundreds of microns. The combination of these optical recording media and optical heads makes it possible to stack plural pairs thereof within an ultra-thin space, thus greatly improving the on-line capacity of the optical recording apparatus.

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