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8 February 2019 Curl-free ray mapping in three dimensions for freeform illumination design
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Abstract
An illumination design method that incorporates the entire 3-D geometry between the optical surface and target plane into the ray mapping calculation has been developed. The resulting mapping relationship is integrable along the specific contours of the optical surface instead of a 2-D plane. The method is capable of creating extremely high performance, off-axis designs (97% uniformity at 54-deg off-axis), and since it explicitly accounts for system geometry, appears to be easily generalizable.
© 2019 Society of Photo-Optical Instrumentation Engineers (SPIE) 0091-3286/2019/$25.00 © 2019 SPIE
Caleb D. Gannon and Rongguang Liang "Curl-free ray mapping in three dimensions for freeform illumination design," Optical Engineering 58(2), 025102 (8 February 2019). https://doi.org/10.1117/1.OE.58.2.025102
Received: 4 October 2018; Accepted: 18 January 2019; Published: 8 February 2019
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