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Pulse Width Modulation of Continuum Sources for Determination of Chemical Composition

  • US 20170102320A1
  • Filed: 12/20/2016
  • Published: 04/13/2017
  • Est. Priority Date: 12/28/2012
  • Status: Active Grant
First Claim
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1. A light source for use in an optical sensor, the light source comprising:

  • a resistively heated element; and

    a power circuit configured to provide a pulse width modulated voltage to the resistively heated element, the pulse width modulated voltage comprising;

    a duty cycle with a first voltage; and

    a pulse period including a period with a second voltage, wherein;

    the duty cycle, the first voltage, and the pulse period are selected so that the resistively heated element is heated to a first temperature; and

    the first temperature is selected to emit black body radiation in a continuum spectral range.

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