7 December 2015 Freeform optics construction with nonuniformly sampled grids in modified double‐pole coordinate system
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Abstract
The intensity distributions of some light sources have the rotationally symmetric property. We propose a method to design freeform optics by sampling the source intensity distribution nonuniformly in a modified double‐pole coordinate system to satisfy the circular emission pattern of the light source. We can greatly improve the smoothness of the designed freeform surfaces and maximize the collection efficiency. We demonstrate the design method with two freeform illumination lenses: one for the light from the multimode filter and the other for the light emitting diode with a hemisphere emitting solid angle. We also demonstrate that the nonuniform sampling algorithm has significant advantages for designing freeform reflectors with superlarge collection angle.
© 2015 Society of Photo‐Optical Instrumentation Engineers (SPIE)
Donglin Ma, Shaun Pacheco, Chengliang Wang, Rongguang Liang, "Freeform optics construction with nonuniformly sampled grids in modified double‐pole coordinate system," Optical Engineering 54(12), 125102 (7 December 2015). https://doi.org/10.1117/1.OE.54.12.125102 . Submission:
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