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System for capturing graphical images using hyperspectral illumination

  • US 20040141213A1
  • Filed: 01/09/2004
  • Published: 07/22/2004
  • Est. Priority Date: 01/09/2003
  • Status: Active Grant
First Claim
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1. A method for creating a digital master of a graphical image in a hyperspectral form, the method comprising the steps of:

  • dividing a light beam from an illumination source into a plurality of component beams each representing one of a plurality of hyperspectral bandpasses, wherein the plurality of hyperspectral bandpasses define a spectrum characterized by wavelengths ranging continuously between 360 and 830 nanometers, and wherein the component beam for each hyperspectral bandpass is characterized by a substantially unique and non-overlapping selection of continuous wavelengths from the spectrum;

    successively illuminating one or more portions of the graphical image with each of the plurality of component beams;

    measuring a light intensity with a sensor for each of the one or more illuminated portions of the graphical image with respect to each of the plurality of component beams;

    transforming each measured light intensity into a relative light intensity based on minimum and maximum light intensities measured by the sensor; and

    saving the relative light intensities in a buffer or data file as a hyperspectral trace representing a spectral power distribution.

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