Transmissive optical and magneto-optical data storage media

Details Transmissive optical and magneto-optical data storage media Transmissive optical and magneto-optical data storage media

1997-01-07

1998-04-21

Swann, Tod R.

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369 13, 3692754, 369283, G11B 700

Patent

active

057425817

ABSTRACT:
An optical data storage medium transmissive to a laser beam and formed of a light transmissive substrate that provides mechanical support, and a light transmissive data substrate formed on the substrate. The data substrate is patterned to form block regions that block the laser beam from passing through, and pass regions that allow the laser beam to pass through, such that the blockage or passage of light through the optical storage medium reflects the type of data bits to be stored on the optical medium. In another embodiment a magneto-optical data storage medium which is also transmissive (or partly transmissive) to a laser beam includes a data magneto-optical data substrate formed on a substrate. The data substrate is recordable by patterning a magnetic domain with magnetic fields of opposite directions, such that each magnetic direction reflects the type of data bits to be stored on the optical medium. In yet another embodiment the data substrate includes a combination of block and pass regions as well as one or more writeable and/or recordable films.

REFERENCES:
patent: 5255262 (1993-10-01), Best et al.
patent: 5625617 (1997-04-01), Hopkins et al.
"Optical Beam Deflection Using Dynamic Volume Reflection Gratings" in Optical and Quantum Electronics 21 (1989), pp. 151-154.
"Scanning Beam Collimation Method for Measuring Dynamic Angle Variations Using an Acousto-Optic Deflector", Lijiang Zeng, et al., 1662 Opt. Eng. 35(2) 1662-1663 (Jun. 1996).
"Volume Holographic Memory Systems: Techniques and Architectures", Optical Engineering, Aug. 1995, vol. 34, No. 8, pp. 2193-2203.

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