@inproceedings{ac1e3a82d66f4e328b9c1dacbed5b5f9,
title = "Iterative freeform lens design for extended light source",
abstract = "Freeform lens design for LED beam shaping is a difficult inverse problem which generally doesn't have a unique solution. Under point source approximation, we have proposed an iterative wavefront tailoring (IWT) method [Opt. Lett. 44, 2274-2277 (2019)] for manipulating the irradiance distribution on a planar or curved target. This method has the ability to generate a variety of freeform lens structures including plano-freeform, spherical freeform and double freeform lenses with high accuracy. However, such a point-source design method becomes less valid for a compact design where the LED size is no longer negligible. We integrate the IWT method with an adaptive over compensation to reduce the irradiance deformations caused by the extended LED source. The IWT designs are iteratively modified to approach the prescribed irradiance distributions with the help of an over compensation coefficients. The new composite method combines the advantages of both the IWT method and the over compensation method.",
keywords = "Adaptive over compensation, Freeform lens, Itertive wavefront tailoring, LED illumination",
author = "Zexin Feng and Dewen Cheng and Yongtian Wang",
note = "Publisher Copyright: {\textcopyright} COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.; Optical Design and Testing XI 2021 ; Conference date: 10-10-2021 Through 12-10-2021",
year = "2021",
doi = "10.1117/12.2601317",
language = "English",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Yongtian Wang and Kidger, {Tina E.} and Osamu Matoba and Rengmao Wu",
booktitle = "Optical Design and Testing XI",
address = "United States",
}