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SINGLE BEAM OPTICAL APPARATUS AND METHOD

  • US 20090274191A1
  • Filed: 04/22/2009
  • Published: 11/05/2009
  • Est. Priority Date: 04/22/2008
  • Status: Abandoned Application
First Claim
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1. A single-beam optical apparatus suitable for measuring thermal diffusivity of a sample, the apparatus comprising:

  • a laser source generating a focused laser beam capable of heating a portion of the sample so as to create a thermal bump via thermal dilation, the thermal bump reflecting a reflected portion of the focused laser beam;

    means for modulating the intensity of the laser beam;

    an aperture;

    a sensor positioned relative to the reflected portion of the focused laser beam so as to generate a measured signal from the reflected portion of the focused laser beam that passes through the aperture; and

    a module for determining at least the parameters of a relationship between a property of the thermal bump and the measured signal.

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