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Light collection optics for measuring flux and spectrum from light-emitting devices

United States Patent

9,347,824
May 24, 2016
View the Complete Patent at the US Patent & Trademark Office
Systems and methods for accurately measuring the luminous flux and color (spectra) from light-emitting devices are disclosed. An integrating sphere may be utilized to directly receive a first portion of light emitted by a light-emitting device through an opening defined on the integrating sphere. A light collector may be utilized to collect a second portion of light emitted by the light-emitting device and direct the second portion of light into the integrating sphere through the opening defined on the integrating sphere. A spectrometer may be utilized to measure at least one property of the first portion and the second portion of light received by the integrating sphere.
McCord; Mark A. (Los Gatos, CA), DiRegolo; Joseph A. (Livermore, CA), Gluszczak; Michael R. (San Jose, CA)
KLA-Tencor Corporation (Milpitas, CA)
14/ 527,034
October 29, 2014
GOVERNMENT LICENSE RIGHTS This invention was made with government support under Government Contract No. DE-EE0005877 awarded by the U.S. Department of Energy. The government has certain rights in the invention.