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Optical devices

United States Patent

July 13, 2010
View the Complete Patent at the US Patent & Trademark Office
An optical manifold for efficiently combining a plurality of blue LED outputs to illuminate a phosphor for a single, substantially homogeneous output, in a small, cost-effective package. Embodiments are disclosed that use a single or multiple LEDs and a remote phosphor, and an intermediate wavelength-selective filter arranged so that backscattered photoluminescence is recycled to boost the luminance and flux of the output aperture. A further aperture mask is used to boost phosphor luminance with only modest loss of luminosity. Alternative non-recycling embodiments provide blue and yellow light in collimated beams, either separately or combined into white.
Chaves; Julio C. (Santa Ana, CA), Falicoff; Waqidi (Newport Beach, CA), Minano; Juan C. (Madrid, ES), Benitez; Pablo (Madrid, ES), Dross; Oliver (Madrid, ES), Parkyn, Jr.; William A. (Lomita, CA)
Light Prescriptions Innovators, LLC (Altadena, CA)
11/ 890,601
August 6, 2007
STATEMENT REGARDING FEDERALLY FUNDED RESEARCH AND DEVELOPMENT This invention was supported in part by the National Energy Technology Laboratory Award No. DE-FC26-05NT42341. The Government may have certain rights in this invention.