Storage Media Access Control Method and System

Abstract

A computer-readable medium having material at a select position therein and containing instructions for controlling an optical reader to cause the optical reader to re-read the position having the material one or more times to elicit a measurable parameter at such position.

1 - 3 . (canceled)  
   
   
       4 . An optical recording medium readable by an optical reader, said optical recording medium having optical data structures thereon and comprising a light-changeable composition selectively placed in one or more predetermined positions with respect to one or more of the optical data structures, wherein the light-changeable composition is comprised in a polymeric material that is applied or adhered to one or more surfaces of said medium.  
   
   
       5 . The optical recording medium described in  claim 4  wherein the polymeric material comprises a label.  
   
   
       6 . The optical recording medium described in  claim 4  wherein the polymeric material is an optically clear material deposited on a layer or a surface of the medium.  
   
   
       7 . The optical recording medium described in  claim 4  wherein the light-changeable composition is a reversible light-changeable composition.  
   
   
       8 . The optical recording medium described in  claim 4  wherein the medium contains instruction for causing the optical reader to determine the position(s) of the light-changeable composition with respect to the one or more optical data structures such that the one or more optical data structures is read only if the position(s) of the light-changeable composition with respect to the one or more optical data structures is in accord with reference information.  
   
   
       9 . The optical recording medium described in  claim 4  wherein the medium is a writable or recordable optical recording medium and the light-changeable composition is placed in a phase change layer such that the light-changeable composition interferes with the read of data in the medium and any change in said data.  
   
   
       10 . The optical recording medium described in  claim 7  wherein the data structures comprise pits and lands, and wherein the light-changeable composition is a delayed light-changeable composition placed at one or more pits, one or more lands, or both.  
   
   
       11 . The optical recording medium described in  claim 10  wherein the delayed light-changeable composition causes erroneous reading of a pit as a land or a reading of a land as a pit upon reread after delay.  
   
   
       12 . A method of manufacturing an optical recording medium having optical data structures thereon, the method comprising the steps of: 
 a) premastering of data;    b) formation of a glass master according to the premastered data;    c) electroforming of the data-bearing glass master to provide a father disc;    d) formation of a mother disc from the father disc;    e) production of one or more children discs from the mother disc bearing optical duplicates of the father disc, thereby providing one or more stampers;    f) injection molding or stamping using a father disc or a stamper to provide the medium;    g) while the medium is still fixed in the mold or in the stamper selectively imprinting a non-embossed surface of the medium with the light-changeable composition in one or more predetermined positions with respect to one or more of the optical data structures;    h) buffering;    i) metal sputtering the data-bearing surface;    j) affixing a second polycarbonate substrate or protective coating over the surface bearing the light-changeable composition;    k) spin coating a protective coating; and    l) UV curing.    
   
   
       13 . The method described in  claim 12  wherein imprinting comprises gravure, laser printing, Mylar screen-printing, drop-on-demand printing; or CIJ.  
   
   
       14 . The method described in  claim 12  wherein imprinting comprises drop-on-demand printing.  
   
   
       15 . The method described in  claim 12  wherein imprinting the light-changeable composition comprises spin coating thereof.  
   
   
       16 . A method of manufacturing a copy-protected optical recording medium having optical data structures thereon, comprising: 
 providing an optical recording medium having at least one data structure comprising one or more of pits, lands, or deformations; and    placing a light-changeable material effective to inhibit or prevent unauthorized copying of a data structure at one or more specific locations with respect to at least one data structure thereon.    
   
   
       17 . The method described in  claim 16  wherein the placing comprises a) formulating the light-changeable material with a UV cure resin or with a photoinitiator, wherein the cure resin or photoinitiator may be cured by irradiation with UVA, UVB, or UVC radiation; 
 b) curing the resin at one or more precise locations on the medium by irradiation with light source producing UVA, UVB, or UVC radiation; and    c) rinsing off any uncured resin.    
   
   
       18 . The method described in  claim 16  wherein the specific locations are specified by means of a photomask.  
   
   
       19 . The method described in  claim 16  wherein the light-changeable material comprises quantum dots, nanocrystals, or fluorescent microspheres.  
   
   
       20 . An optical recording medium readable by an optical reader, said optical recording medium having optical data structures thereon and comprising a light-changeable composition selectively placed in one or more predetermined positions with respect to one or more of the optical data structures, wherein the light-changeable composition is applied or adhered to one or more surfaces of said medium.  
   
   
       21 . The optical recording medium described in  claim 20  wherein the light-changeable material is selected and is registered with said one or more optical data structures, wherein the optical data structures comprise pits and/or lands, and wherein the light-changeable composition erroneously causes reading of at least one pit as a land and a reading of at least one land as a pit.  
   
   
       22 . The optical recording medium described in  claim 20  wherein the medium is a writable or recordable optical recording medium and the light-changeable material is placed in a phase change layer such that the light-changeable material interferes with the read of data in a substrate of the medium and any change in said substrate data.