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System and method for selectively enabling or disabling an optical device

  • US 8,258,481 B2
  • Filed: 04/24/2006
  • Issued: 09/04/2012
  • Est. Priority Date: 04/25/2005
  • Status: Expired due to Fees
First Claim
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1. A system for selectively enabling an optical medium, the system comprising:

  • a material applied to at least a portion of the medium to prevent reading of the medium by a read-laser beam; and

    an energy source having an energy type that is different from the read-laser beam, wherein the energy source changes the state of the material to permanently permit reading of the optical medium by the read-laser beam even in the absence of the energy source.

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