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Transmitting/Reflecting Emanating Light With Time Variation

  • US 20090195773A1
  • Filed: 02/01/2008
  • Published: 08/06/2009
  • Est. Priority Date: 02/01/2008
  • Status: Active Grant
First Claim
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1. A method of using a filter arrangement, the method comprising:

  • while an object travels along a path past the filter arrangement and emanates light within an application'"'"'s range of photon energies, transmitting/reflecting at least some of the emanating light through the filter arrangement;

    the act of transmitting/reflecting at least some of the emanating light through the filter arrangement including at least one of;

    while the object is in each of two or more segments of the path, transmitting/reflecting respective portions of the emanating light through respective positions of a filter assembly within the filter arrangement;

    each of the respective positions having a respective transmission function within the range;

    the transmission functions of at least two of the positions being sufficiently different that time variation occurs in the emanating light between at least two of the segments; and

    while the object is in each of a series of segments of the path, transmitting/reflecting a respective portion of the emanating light through a filter component within the filter arrangement;

    within the range, the filter component having a combined transmission function in which a set of two or more simpler transmission functions is superimposed;

    the set including first and second simpler non-uniform transmission functions, the set being superimposed such that time variation occurs in the emanating light in accordance with superposition of the first and second simpler non-uniform transmission functions.

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