Laser-optical writing and reading process using a thermally alte

Details Laser-optical writing and reading process using a thermally alte Laser-optical writing and reading process using a thermally alte

1988-02-10

1992-03-17

McElheny, Jr., Donald

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

G11B 700

Patent

active

050974637

ABSTRACT:
A laser-optical write and read process whereby a thermally alterable recording layer which contains liquid-crystalline compounds in homogeneous planar orientation and forms part of a multilayer, sheet-like recording material is written by means of a write laser beam with analogue or digital data in the form of thermally altered areas, whereafter the written data are read by means of a read laser beam, including: analyzing the light transmitted or reflected by the recording material, and reading the data by determining the polarization-optical contrast between the thermally altered and the unaltered areas and/or utilizing for this purpose the interference of the light rays which form from the laser lightwaves in a Gaussian intensity distribution owing to the different phase velocities of the light in the center of thermally altered areas on the one hand and their thermally unaltered surroundings on the other.

REFERENCES:
patent: 2766659 (1956-10-01), Baerwald
patent: 4160270 (1979-07-01), Goldschmidt et al.
patent: 4405993 (1983-09-01), Kahn et al.
patent: 4577306 (1986-03-01), Howe et al.
patent: 4586092 (1986-04-01), Martens et al.
patent: 4612587 (1986-09-01), Kaneko et al.
patent: 4702945 (1987-10-01), Etzbach et al.
patent: 4729122 (1988-03-01), Itoh
patent: 4752820 (1988-06-01), Kuroiwa et al.
patent: 4833043 (1989-05-01), Gardner
H. Birecki et al. Erasable Optical Liquid Crystal Disc. Memory Proceedings of SPIE, vol. 420, 1983, Jun. 6-10, Optical Storage Media, Washington.
Urabe et al., Laser-Address Liquid Crystal Light Valve with Dichroic Dye Added as a Laser Beam Absorber, J. Appl. Phys. 54, (3), Mar. 1983, pp. 1152-1558.
Shibaev et al. Thermotropic Liquid-Crystalline Polymers:14, Thermo-Recording on Liquid-Crystalline Polymers with the Aid of a Laser Beam, Polymer Communications, 1983, vol. 24, Dec. 1983, pp. 364-365.
Coles et al., High-Resolution Laser-Addressed Liquid Crystal Polymer Storage Displays, Polymer, 1985, vol. 26, Nov. 1985, pp. 1801-1806.

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