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Active multiple-color imaging polarimetry

  • US 7,072,039 B2
  • Filed: 08/20/2003
  • Issued: 07/04/2006
  • Est. Priority Date: 08/20/2003
  • Status: Expired due to Term
First Claim
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1. A system for remotely imaging a sample, using optical radiation reflected/scattered from the sample, comprising:

  • a first source configured to emit first optical radiation with a first polarization and that varies at a first frequency;

    a second source configured to emit second optical radiation with a second polarization and that varies at a second frequency;

    a focal planar array (FPA) configured to detect the first and second optical radiation after interaction with the sample and generate a single detection signal;

    a first lock-in amplifier configured to process the single detection signal based on the first frequency to produce a first output signal; and

    a second lock-in amplifier configured to process the single detection signal based on the second frequency to produce a second output signal,wherein the FPA detects the first and second optical radiation free-of image mis-registration.

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