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Apparatus and method for determining sparkle

  • US 9,411,180 B2
  • Filed: 01/20/2012
  • Issued: 08/09/2016
  • Est. Priority Date: 02/28/2011
  • Status: Active Grant
First Claim
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1. An apparatus for measuring pixel power deviation of a transparent sample, the apparatus comprising:

  • a pixelated source, the pixelated source comprising a plurality of pixels, wherein each of the plurality of pixels has referenced indices i and j; and

    an imaging system optically disposed along an optical path originating from the pixelated source, the imaging system comprising;

    an imaging device receiving an image from the pixelated source through the transparent sample, the imaging device being disposed along the optical path; and

    an aperture disposed on the optical path between the pixelated source and the imaging device, wherein the aperture has an adjustable collection angle for an image originating from the pixelated source,wherein the imaging system determines boundaries between adjacent pixels of the plurality of pixels in the image, integrates within the boundaries to obtain an integrated total power for each of the plurality of source pixels in the image, and calculates the pixel power deviation of the transparent sample based on the integrated total powers.

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