Abstract
Uniform illumination was generated by use of a large number of diode laser emitters and a single nonimaging paraboloid with a Lambertian scatterer in the truncation plane. Laser light traverses a path toward the Lambertian surface and back by total internal reflection. An overall efficiency of 69% was demonstrated. Improvements that would increase the efficiency to more than 85% are suggested. The illuminated area is circular, with 14-mm diameter. The spatial nonuniformity of the beam profile is less than ±2%.
© 2004 Optical Society of America
Full Article | PDF ArticleMore Like This
Taito Alahautala, Erkki Lassila, and Rolf Hernberg
Appl. Opt. 43(21) 4232-4236 (2004)
Jin-Jia Chen, Ze-Yu Huang, Te-Shu Liu, Ming-Da Tsai, and Kuang-Lung Huang
Appl. Opt. 54(28) E146-E152 (2015)
Wei Tai and Rudolf Schwarte
Appl. Opt. 39(31) 5801-5805 (2000)