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Multi-wavelength imaging system

  • US 20050264813A1
  • Filed: 05/13/2005
  • Published: 12/01/2005
  • Est. Priority Date: 06/25/2003
  • Status: Active Grant
First Claim
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1. A multi-energy polarization imaging system comprising:

  • (a) at least one energy source for irradiating a target with at least one quantity of light and at least one quantity of energy, the at least one quantity of light comprising at least one wavelength of light and the at least one quantity of energy comprising at least one wavelength of energy, wherein the wavelength of the energy is either shorter or longer than the wavelength of the at least one quantity of light;

    (b) a polarization-state generator for generating a polarization state for each quantity of light, the polarization-state generator comprising at least one polarizer, each polarizer being adapted to polarize an individual wavelength before the one or more quantities of light enter a first waveplate;

    (c) a polarization-state receiver for evaluating a resulting polarization state of each of the one or more quantities of light following illumination of the target, the polarization-state receiver comprising a second waveplate through which the one or more quantities of light are transmitted before entering at least one second polarizer;

    (d) an image-capture device for capturing at least a first image and a second image of the target irradiated by the at least one quantity of light and the at least one quantity of energy, the first image corresponding to an image of the target generated from the wavelength of light and the second image corresponding to an image of the target generated from the wavelength of energy; and

    (e) a processing unit for assigning a weighting factor to at least one of the first and second images and evaluating a weighted difference between the first and second images to generate a multi-wavelength image of the target.

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