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Optical spectrometer and method

  • US 20050175362A1
  • Filed: 02/21/2004
  • Published: 08/11/2005
  • Est. Priority Date: 01/22/2004
  • Status: Abandoned Application
First Claim
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1. In an optical device having at least one movable element, a method of operating the optical device comprising the steps of:

  • receiving an optical signal from an optical input aperture;

    diffracting the optical signal into one or more chromatically dispersed non-zeroth-order components and a non-chromatically dispersed zeroth-order component; and

    directing one of the non-zeroth-order components to an optical output;

    CHARACTERIZED IN THAT;

    positional feedback information about the movable element is determined. from the zeroth-order optical signal.

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