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Measurement of volume holographic gratings

  • US 8,139,212 B2
  • Filed: 05/24/2011
  • Issued: 03/20/2012
  • Est. Priority Date: 05/15/2008
  • Status: Active Grant
First Claim
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1. A method for measuring a volume holographic grating over a spectral range, the method comprising:

  • generating a spectrometer image of a broadband light beam diffracted by an area of a volume holographic grating, the broadband light beam having a continuous spectral coverage range and the spectrometer image including a pixel; and

    determining one or more characteristics of the area of the volume holographic grating based on the pixel in the spectrometer image corresponding to a spectral measurement indicative of the one or more characteristics selected from the group consisting of diffraction efficiency, thickness, refractive index modulation depth, grating spacing, slant angle, and bulk transmission.

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