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SYSTEMS AND METHODS FOR CHARACTERIZING HIGH-SCATTER GLASS-BASED SAMPLES USING LIGHT-SCATTERING POLARIMETRY

  • US 20200132548A1
  • Filed: 10/29/2019
  • Published: 04/30/2020
  • Est. Priority Date: 10/31/2018
  • Status: Active Grant
First Claim
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1. A method of using light-scattering polarimetry to characterize an optical retardance of a glass-based sample, comprising:

  • a. directing a light beam from a light source into the glass-based sample while varying a polarization of the light beam between at least first and second polarization states to generate scattered light for each polarization state;

    b. for each of the at least first and second polarization states, capturing the scattered light with an image sensor having an exposure time tE and that captures frames at a frame rate FR, wherein the scattered light has an intensity distribution at the image sensor;

    c. moving the sample at a sample speed SS relative to at least one of the light beam and the image sensor so that for each of the at least first and second polarization states, the image sensor averages two or more of the intensity distributions per frame to form an averaged intensity distribution; and

    d. using the averaged intensity distribution for each of at least first and second polarization states to characterize the optical retardance.

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