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Optical wheel

  • US 9,606,348 B2
  • Filed: 06/07/2012
  • Issued: 03/28/2017
  • Est. Priority Date: 08/16/2011
  • Status: Active Grant
First Claim
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1. A phosphor wheel comprising:

  • a first layer that is a wavelength conversion portion, the wavelength conversion portion comprising a wavelength conversion material having a flat surface; and

    a second layer directly adjacent the first layer, the second layer comprising at least one convex surface, and wherein the second layer is directly on the flat surface of the wavelength conversion portion.

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