High density optical storage system

专利名称：High density optical storage system发明人：Salim N. Jabr申请号：US08/245023申请日：19940517公开号：US05471455A公开日：19951128

摘要：Digital information is represented by surface steps orthogonal to the surface ofa record carrier, said steps having a plurality of values between one tenth and 10,000nanometers. The steps are read out by an optical differential interference method that iscapable of resolving one tenth of a nanometer. The steps are written by a repeatedmasking and etching technique to form a master record carrier on glass from which astamper is formed by molding and used to stamp replicate record carriers in polymericmaterial. In a different embodiment of the record carrier the surface steps are created bya modulated laser beam that ablates an integral number of layers from a pre-coatedmultilayer structure. In a third embodiment the data is represented by modulating theindex of refraction between spots on a thin material film. The index difference is writtenoptically. An extension to multiple thin film layers is also disclosed. An optically writeableembodiment of the invention is presented wherein the surface steps are produced byablating a surface, utilising optical energy pulses.

申请人：JABR; SALIM N.

代理机构：Flehr, Hohbach, Test & Albritton

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