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Thermographic evaluation technique

  • US 5,292,195 A
  • Filed: 09/09/1992
  • Issued: 03/08/1994
  • Est. Priority Date: 09/09/1992
  • Status: Expired due to Fees
First Claim
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1. A method for thermographically evaluating objects, comprising the steps of:

  • (a) applying a selected amount of energy to a first object having a known surface structure in order to raise the surface temperature of the first object;

    (b) imaging the first object having a known surface structure and ensuring that the thermographic imaging device substantially reaches the maximum limit of its dynamic range when imaging the known surface structure;

    (c) recording on a storage device the image of the first object having the known surface structure;

    (d) enhancing the recorded image of the first object to reveal the known surface structure;

    (e) applying the selected amount of energy to a second object to be evaluated in order to raise the surface temperature of the second object;

    (f) imaging the second object with the thermographic imaging device;

    (g) enhancing the image of the second object; and

    (h) comparing the recorded image of the first object having the known surface structure to the image of the second object to be evaluated, in order to determine whether there are any differences in the surface structure of the second object.

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