Short-wave infrared super-continuum lasers for early detection of dental caries

CAFC
  • US 9,861,286 B1
  • Filed: 08/25/2017
  • Issued: 01/09/2018
  • Est. Priority Date: 12/31/2012
  • Status: Active Grant
First Claim
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1. A wearable device for use with a smart phone or tablet, the wearable device comprising:

  • a measurement device including a light source comprising a plurality of light emitting diodes (LEDs) for measuring one or more physiological parameters, the measurement device configured to generate, by modulating at least one of the LEDs having an initial light intensity, an optical beam having a plurality of optical wavelengths, wherein at least one of the LEDs emits at a first wavelength having a first penetration depth into tissue and at least another of the LEDs emits at a second wavelength having a second penetration depth into the tissue different from the first penetration depth, wherein at least a portion of the optical beam includes a near-infrared wavelength between 700 nanometers and 2500 nanometers;

    the measurement device comprising one or more lenses configured to receive and to deliver at least a portion of each of the first and of the second wavelengths to tissue, wherein the tissue reflects at least a portion of each of the first and of the second wavelengths;

    the measurement device further comprising a receiver configured to;

    capture light while the LEDs are off and convert the captured light into a first signal andcapture light while at least one of the LEDs is on and to convert the captured light into a second signal, the captured light including at least a portion of one of the first or second wavelengths reflected from the tissue;

    the measurement device configured to improve a signal-to-noise ratio of the optical beam reflected from the tissue by differencing the first signal and the second signal;

    the light source configured to further improve the signal-to-noise ratio of the optical beam reflected from the tissue by increasing the light intensity relative to the initial light intensity from at least one of the LEDs;

    the measurement device further configured to generate an output signal representing at least in part a non-invasive measurement on blood contained within the tissue.

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