title: Combined feedback method for designing a free-form optical system with complicated illumination patterns for an extended LED source.
abstract: A combined feedback design method based on variable separation mapping is proposed in this paper to design free-form optical systems for an extended LED source with complicated illumination patterns. In this method, macro energy division and micro illuminance distribution feedback modifications are carried out according to the deviation between the simulated illumination results and the target requirements. The free-form optical system is then regenerated, and the deviation could be minimized through multiple iterations. Results indicate that free-form optical system designed by this method could achieve precise energy distribution, high regional illuminance uniformity (89.7%), and high light output efficiency (94.9%) simultaneously.
authors.affiliation: State Key Lab on Integrated Optoelectronics/Tsinghua National Lab on Information Science and Technology, Department of Electronic Engineering, Tsinghua University, Beijing, China
authors.forename: Wenchang
authors.initials: W
authors.lastname: Situ
authors.forename: Yanjun
authors.initials: Y
authors.lastname: Han
authors.forename: Hongtao
authors.initials: H
authors.lastname: Li
authors.forename: Yi
authors.initials: Y
authors.lastname: Luo