Optical design for a cost-effective low-beam headlamp with a white light LED

Wen Shing Sun; Chuen Lin Tien; Jian An Chen; Jhe Syuan Lin

doi:10.1007/s11082-020-02604-1

Optical design for a cost-effective low-beam headlamp with a white light LED

Wen Shing Sun, Chuen Lin Tien, Jian An Chen, Jhe Syuan Lin

Department of Optics and Photonics

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

We present a design for a cost-effective low-beam automotive headlamp with a single light-emitting diode (LED) light source. The proposed design consists of a white LED, an elliptical reflector, a parabolic reflector, a toric lens, a filter, and a prism array. The white LED had a luminous flux of 146 lm. Non-sequential rays were used to improve the efficiency and a toric lens was employed to optimize the light pattern on a 25 m screen which appeared as rectangular with a high degree of uniformity. In addition, the filter and the prism array were modified to correct the measured light pattern results to meet the requirements of ECE R112. We set the reflectivity of the elliptical and parabolic reflectors for the compound reflectors to be 95%. The transmittance of each surface of the toric lens is 98%. The total received lumens was 80.62 lm, and the overall efficiency was 55.22%.

Original language	English
Article number	474
Journal	Optical and Quantum Electronics
Volume	52
Issue number	11
DOIs	https://doi.org/10.1007/s11082-020-02604-1
State	Published - 1 Nov 2020

Keywords

Light-emitting diode (LED)
Low-beam headlamp
Optical design
Prism array
Toric len

Access to Document

10.1007/s11082-020-02604-1

Design of Large Diameter Projector Lens for Dlp Four Million Pixel and Discussion on Temperature and Relative Illumination
Sun, W.-H. (PI)
1/08/19 → 31/07/20
Project: Research

Cite this

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title = "Optical design for a cost-effective low-beam headlamp with a white light LED",

abstract = "We present a design for a cost-effective low-beam automotive headlamp with a single light-emitting diode (LED) light source. The proposed design consists of a white LED, an elliptical reflector, a parabolic reflector, a toric lens, a filter, and a prism array. The white LED had a luminous flux of 146 lm. Non-sequential rays were used to improve the efficiency and a toric lens was employed to optimize the light pattern on a 25 m screen which appeared as rectangular with a high degree of uniformity. In addition, the filter and the prism array were modified to correct the measured light pattern results to meet the requirements of ECE R112. We set the reflectivity of the elliptical and parabolic reflectors for the compound reflectors to be 95%. The transmittance of each surface of the toric lens is 98%. The total received lumens was 80.62 lm, and the overall efficiency was 55.22%.",

keywords = "Light-emitting diode (LED), Low-beam headlamp, Optical design, Prism array, Toric len",

author = "Sun, {Wen Shing} and Tien, {Chuen Lin} and Chen, {Jian An} and Lin, {Jhe Syuan}",

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T1 - Optical design for a cost-effective low-beam headlamp with a white light LED

AU - Sun, Wen Shing

AU - Tien, Chuen Lin

AU - Chen, Jian An

AU - Lin, Jhe Syuan

PY - 2020/11/1

Y1 - 2020/11/1

N2 - We present a design for a cost-effective low-beam automotive headlamp with a single light-emitting diode (LED) light source. The proposed design consists of a white LED, an elliptical reflector, a parabolic reflector, a toric lens, a filter, and a prism array. The white LED had a luminous flux of 146 lm. Non-sequential rays were used to improve the efficiency and a toric lens was employed to optimize the light pattern on a 25 m screen which appeared as rectangular with a high degree of uniformity. In addition, the filter and the prism array were modified to correct the measured light pattern results to meet the requirements of ECE R112. We set the reflectivity of the elliptical and parabolic reflectors for the compound reflectors to be 95%. The transmittance of each surface of the toric lens is 98%. The total received lumens was 80.62 lm, and the overall efficiency was 55.22%.

AB - We present a design for a cost-effective low-beam automotive headlamp with a single light-emitting diode (LED) light source. The proposed design consists of a white LED, an elliptical reflector, a parabolic reflector, a toric lens, a filter, and a prism array. The white LED had a luminous flux of 146 lm. Non-sequential rays were used to improve the efficiency and a toric lens was employed to optimize the light pattern on a 25 m screen which appeared as rectangular with a high degree of uniformity. In addition, the filter and the prism array were modified to correct the measured light pattern results to meet the requirements of ECE R112. We set the reflectivity of the elliptical and parabolic reflectors for the compound reflectors to be 95%. The transmittance of each surface of the toric lens is 98%. The total received lumens was 80.62 lm, and the overall efficiency was 55.22%.

KW - Light-emitting diode (LED)

KW - Low-beam headlamp

KW - Optical design

KW - Prism array

KW - Toric len

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DO - 10.1007/s11082-020-02604-1

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JO - Optical and Quantum Electronics

JF - Optical and Quantum Electronics

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M1 - 474

ER -

Optical design for a cost-effective low-beam headlamp with a white light LED

Abstract

Keywords

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Projects

Design of Large Diameter Projector Lens for Dlp Four Million Pixel and Discussion on Temperature and Relative Illumination

Cite this