Freeform road lighting lens design

Zexin Feng; Dewen Cheng; Yongtian Wang

doi:10.1117/12.2312452

Freeform road lighting lens design

Zexin Feng^*
, Dewen Cheng
, Yongtian Wang

^*Corresponding author for this work

School of Optics and Photonics

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

2 Citations (Scopus)

Abstract

Road lighting can benefit strongly from LEDs and freeform lenses. However, freeform lenses design for road lighting applications is complicated and difficult when balancing energy efficiency and lighting quality. In addition, the asymmetric properties of the required light distributions and non-neglectable sizes of LEDs make the design more challenging. Currently, we prefer an efficient design strategy with two steps: light distribution optimization and freeform lens construction. In the first step, we employ a modified polynomial representation of the illuminance distribution and perform constrained optimization. In the second step, we construct the freeform lens with double freeform surfaces to realize the optimized light distribution using the ray mapping method associated with over compensation.

Original language	English
Title of host publication	Illumination Optics V
Editors	Tina E. Kidger, Stuart David
Publisher	SPIE
ISBN (Electronic)	9781510619234
DOIs	https://doi.org/10.1117/12.2312452
Publication status	Published - 2018
Event	Illumination Optics V 2018 - Frankfurt, Germany Duration: 14 May 2018 → 16 May 2018

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	10693
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	Illumination Optics V 2018
Country/Territory	Germany
City	Frankfurt
Period	14/05/18 → 16/05/18

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Freefrom lens
Optimization
Road lighting

Access to Document

10.1117/12.2312452

Cite this

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title = "Freeform road lighting lens design",

abstract = "Road lighting can benefit strongly from LEDs and freeform lenses. However, freeform lenses design for road lighting applications is complicated and difficult when balancing energy efficiency and lighting quality. In addition, the asymmetric properties of the required light distributions and non-neglectable sizes of LEDs make the design more challenging. Currently, we prefer an efficient design strategy with two steps: light distribution optimization and freeform lens construction. In the first step, we employ a modified polynomial representation of the illuminance distribution and perform constrained optimization. In the second step, we construct the freeform lens with double freeform surfaces to realize the optimized light distribution using the ray mapping method associated with over compensation.",

keywords = "Freefrom lens, Optimization, Road lighting",

author = "Zexin Feng and Dewen Cheng and Yongtian Wang",

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year = "2018",

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language = "English",

series = "Proceedings of SPIE - The International Society for Optical Engineering",

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TY - GEN

T1 - Freeform road lighting lens design

AU - Feng, Zexin

AU - Cheng, Dewen

AU - Wang, Yongtian

PY - 2018

Y1 - 2018

N2 - Road lighting can benefit strongly from LEDs and freeform lenses. However, freeform lenses design for road lighting applications is complicated and difficult when balancing energy efficiency and lighting quality. In addition, the asymmetric properties of the required light distributions and non-neglectable sizes of LEDs make the design more challenging. Currently, we prefer an efficient design strategy with two steps: light distribution optimization and freeform lens construction. In the first step, we employ a modified polynomial representation of the illuminance distribution and perform constrained optimization. In the second step, we construct the freeform lens with double freeform surfaces to realize the optimized light distribution using the ray mapping method associated with over compensation.

AB - Road lighting can benefit strongly from LEDs and freeform lenses. However, freeform lenses design for road lighting applications is complicated and difficult when balancing energy efficiency and lighting quality. In addition, the asymmetric properties of the required light distributions and non-neglectable sizes of LEDs make the design more challenging. Currently, we prefer an efficient design strategy with two steps: light distribution optimization and freeform lens construction. In the first step, we employ a modified polynomial representation of the illuminance distribution and perform constrained optimization. In the second step, we construct the freeform lens with double freeform surfaces to realize the optimized light distribution using the ray mapping method associated with over compensation.

KW - Freefrom lens

KW - Optimization

KW - Road lighting

UR - https://www.scopus.com/pages/publications/85049206281

U2 - 10.1117/12.2312452

DO - 10.1117/12.2312452

M3 - Conference contribution

AN - SCOPUS:85049206281

T3 - Proceedings of SPIE - The International Society for Optical Engineering

BT - Illumination Optics V

A2 - Kidger, Tina E.

A2 - David, Stuart

PB - SPIE

T2 - Illumination Optics V 2018

Y2 - 14 May 2018 through 16 May 2018

ER -

Freeform road lighting lens design

Abstract

Publication series

Conference

UN SDGs

Keywords

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