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Use of integrating sphere technology to provide uniform, high-intensity light, and wavelength mixing from light emitting diodes

  • US 7,938,643 B2
  • Filed: 01/23/2008
  • Issued: 05/10/2011
  • Est. Priority Date: 01/07/2006
  • Status: Active Grant
First Claim
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1. A method for projecting light into an oral cavity comprising:

  • providing an overhead dental operatory light comprising an integrating sphere that includes an inner reflective surface and an exit aperture, a light source configured to emit light within the integrating sphere, and a lens provided at the exit aperture of the integrating sphere, the light source comprising a plurality of individual light elements, the light elements being configured to emit light at different wavelengths;

    activating the light source to emit light through the exit aperture into the oral cavity; and

    selectively controlling the intensity of the individual light elements to change the spectrum of light emitted by the light fixture so that the oral cavity can be viewed under visible fight that specifically excludes blue wavelengths that can inadvertently initiate curing of certain materials.

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