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Multiple wavelength sensor emitters

  • US 8,849,365 B2
  • Filed: 02/25/2013
  • Issued: 09/30/2014
  • Est. Priority Date: 03/01/2005
  • Status: Active Grant
First Claim
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1. A physiological sensor configured to measure an indication of a physiological characteristic of a living patient, the physiological sensor comprising:

  • a plurality of light emitting sources arranged to impinge light on body tissue of a living patient including at least six light emitting sources, wherein the plurality of light emitting sources emit light of at least three different wavelengths;

    wherein at least a subset of the plurality of light emitting sources are further arranged in two or more clusters, each cluster comprising at least two light emitting sources that emit light within a wavelength range that is different from and does not overlap with the wavelength range of the at least two light emitting sources of other clusters;

    wherein for each cluster, light emitting sources that emit light at proximate wavelengths are adjacent to each other,wherein each light emitting source is activated by addressing at least one of a plurality of rows and at least one of a plurality of columns of an electrical grid;

    a detector responsive to transmitted light after attenuation by body tissue of the living patient, the body tissue including pulsating blood, wherein the detector is configured to generate a signal indicative of a physiological characteristic of the living patient; and

    a sensor housing configured to position the plurality of light emitting sources and the detector with respect to the body tissue of the living patient.

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