Optical memory

Details Optical memory Optical memory

2006-01-24

2006-01-24

Mulvaney, Elizabeth (Department: 1774)

Stock material or miscellaneous articles

Circular sheet or circular blank

C428S064400, C430S270120

Reexamination Certificate

active

06989185

ABSTRACT:
The present invention provides a method of recording information on a memory medium and reading the information, comprising the steps of forming a reflective or transmissive surface having an anisotropic microstructure on a substrate of the memory medium to record information in the microstructure, entering light onto the reflective or transmissive surface, and detecting change in the polarization or intensity of a reflected or transmitted light caused by the microstructure, to read the information. The present invention also provides a memory medium, a production method thereof, and an information reading system.

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Roger Jansson et al.; A quasi three-dimensional optical memory with n-bit memory cells based on the ellipsometric principle: concept and prototype devices; Optics Communications 104 (1994) pp. 277-279, North-Holland, Jan. 1994.
Roger Jansson et al.; Quasi three-dimensional, n-bit optical memory based on the ellipsometric principle: model calculations; Applied Optics vol. 33, No. 29, pp. 6843-6854, Oct. 1994.

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