Iterative and inverse design of a segmented reflector for uniform illumination on the road

Rubing Wu; Hossein Alisafaee

doi:10.1117/12.2593854

4 August 2021 Iterative and inverse design of a segmented reflector for uniform illumination on the road

Rubing Wu, Hossein Alisafaee

Proceedings Volume 11814, Current Developments in Lens Design and Optical Engineering XXII; 118140E (2021) https://doi.org/10.1117/12.2593854
Event: SPIE Optical Engineering + Applications, 2021, San Diego, California, United States

Abstract

We demonstrate an iterative and inverse design of a segmented reflector used to illuminate the road with a uniform light distribution and reduced glare to the oncoming traffic. Design is set to meet the StVZO standard. The maximum brightness obtained is 1460 candela, which is five times brighter than a conventional headlamp of urban shared electric scooters and bicycles, resulting in improved visibility in dark environments. A prototype was built and tested at various environments. The tolerance analysis showed no negative influence on the desired standard light distribution. In addition to this iterative approach, a ray tracing code has been developed for inverse design and to map a desired uniform road illumination pattern back to the candela sensor for corresponding reflector design.

Conference Presentation

Citation Download Citation

Rubing Wu and Hossein Alisafaee "Iterative and inverse design of a segmented reflector for uniform illumination on the road", Proc. SPIE 11814, Current Developments in Lens Design and Optical Engineering XXII, 118140E (4 August 2021); https://doi.org/10.1117/12.2593854

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