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Dual beam tunable spectrometer

  • US 5,477,321 A
  • Filed: 08/31/1994
  • Issued: 12/19/1995
  • Est. Priority Date: 08/31/1994
  • Status: Expired due to Term
First Claim
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1. A dual beam tunable spectrometer comprising:

  • a radiation source generating an incident radiative beam;

    generating means, including an acousto-optic tunable filter, for receiving said incident radiative beam and generating therefrom a reference beam and a sample beam;

    a detector for detecting at least part of said reference beam, and for detecting at least part of said sample beam emitted from a sample following illumination of the sample with said sample beam; and

    a shutter arrangement including a first shutter selectively permitting passage therethrough of said part of said reference beam and a second shutter selectively permitting passage therethrough of said part of said sample beam, said shutter arrangement opening said first shutter and closing said second shutter to permit said detector to detect only said part of said reference beam, said shutter arrangement closing said first shutter and opening said second shutter to permit said detector to detect only said part of said sample beam.

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