Confocal optical microscopy system for multi-layer data storage

Details Confocal optical microscopy system for multi-layer data storage Confocal optical microscopy system for multi-layer data storage

1995-03-02

1997-04-08

Callahan, Timothy P.

Optical: systems and elements

Compound lens system

Microscope

369 94, G02B 2100

Patent

active

056193718

ABSTRACT:
A confocal optical microscopy system for storing and retrieving optical information recorded in multiple layers in an optical disk. The invention includes a system utilizing the principle of confocal optical microscopy for accurately focusing a light beam onto a plane of a layer within a multi-layer disk. Optical information is thereby retrieved from the layer within the multi-layer disk. The invention also includes a method for recording optical data onto the multi-layer disk which comprises stacked multiple layers of transparent material having a distribution of discrete areas of metal film deposited between the layers. The distribution of metal film represents the recorded optical information.

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"More Bits from Pits", John Horgan et al., Scientific American, Aug. 1994, pp. 87-88.
"Confocal Microscopy", Jeff W. Lichtman, Scientific American, Aug. 1994, pp. 40-45.
"IBM Pushing Multilevel Optical Disk" IBM Almaden, San Jose, Calif., R & D Magazine, Aug. 1994, p. 9.

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