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Diffraction grating based interferometric systems and methods

  • US 20030081220A1
  • Filed: 10/18/2001
  • Published: 05/01/2003
  • Est. Priority Date: 10/18/2001
  • Status: Active Grant
First Claim
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1. An interferometer comprising:

  • a low coherence light source;

    a first beam splitter in communication with the light source to split light from the light source into a first sample light beam to be directed onto a sample and a reference light beam, wherein a second sample light beam is received by the interferometer from the sample;

    a diffraction grating positioned to diffract at least one of the reference light beam and the second sample light beam;

    a second beam splitter positioned to receive the second sample light beam and the reference light beam, wherein at least one of the second sample light beam and the reference light beam has been diffracted by the diffraction grating, and the second sample light beam and the diffracted reference light beam are combined in the second beam splitter to form a combined light beam; and

    a detector positioned to receive the combined light beam from the second beam splitter.

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