Optical design of a single freeform lens for both counter-beam and pro-beam in LED tunnel lighting

Jhih-Ling Syu; Tsung-Xian Lee; Cheng-Hung Tsai; Shih-Hsin Ma

doi:10.1117/12.3029377

1 October 2024 Optical design of a single freeform lens for both counter-beam and pro-beam in LED tunnel lighting

Jhih-Ling Syu, Tsung-Xian Lee, Cheng-Hung Tsai, Shih-Hsin Ma

Proceedings Volume 13131, Current Developments in Lens Design and Optical Engineering XXV; 131310K (2024) https://doi.org/10.1117/12.3029377
Event: Optical Engineering + Applications, 2024, San Diego, California, United States

Conference Poster

Abstract

A luminaire designed for tunnel lighting is proposed, featuring the ability to adjust the ratio between counter-beam and pro-beam lighting based on different contexts. This allows the luminaire to achieve the optimal lighting mode for the conditions within the tunnel at that time. When both side LEDs are activated, it operates in symmetric lighting mode. When a single-side LED is activated, it switches to either counter-beam or pro-beam lighting mode. The advantage of this luminaire lies in the use of a single freeform secondary lens and LEDs, making installation simpler. It ensures driver safety and is more energy-efficient than traditional tunnel lights.

Citation Download Citation

Jhih-Ling Syu, Tsung-Xian Lee, Cheng-Hung Tsai, and Shih-Hsin Ma "Optical design of a single freeform lens for both counter-beam and pro-beam in LED tunnel lighting", Proc. SPIE 13131, Current Developments in Lens Design and Optical Engineering XXV, 131310K (1 October 2024); https://doi.org/10.1117/12.3029377

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