Efficient Measurement of Large Light Source Near-Field Color and Luminance Distributions for Optical Design and Simulation
The color and luminance distributions of large light sources are difficult to measure because of the size of the source and the physical space required for the measurement. In this article, we describe a method for the measurement of large light sources in a limited space that efficiently overcomes the physical limitations of traditional far-field measurement techniques. The measurement is performed from within the near-field of the light source, enabling a compact measurement set-up, and generates a detailed near-field color and luminance distribution model that can be directly converted to ray sets for optical design and that can be extrapolated to far-field distributions for illumination design.
Published on the SPIE Digital Library on August 21, 2009.