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Remote measurement of near-surface physical properties using optically smart surfaces

  • US 5,682,236 A
  • Filed: 07/02/1993
  • Issued: 10/28/1997
  • Est. Priority Date: 07/02/1993
  • Status: Expired due to Fees
First Claim
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1. A method for remotely measuring one or more physical characteristics at or near the surface of a curved object, said method comprising;

  • a. conformally affixing to said surface of said object a thin flexible film, at least a portion of which contains a hologram, said hologram forming in response to illumination by electromagnetic radiation an image which varies in a predetermined way in response to variations in said physical characteristics at or near said surface, said film including a mirrored surface adjacent said hologram,b. illuminating said film with one or more address beams of coherent light,c. collecting at least a portion of light emanating from said film in response to said illumination, andd. analyzing said collected light to determine variations in said physical characteristics at or near said object surface that cause a variation in said collected radiation.

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