Design of freeform LED concentrator for micro-projector

ZHAO Xing; WU Hong-chao; SONG Li-pei; FANG Zhi-liang

doi:10.3788/OPE.20101810.2123

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Design of freeform LED concentrator for micro-projector

Article | 更新时间：2020-08-12

- Design of freeform LED concentrator for micro-projector
- Optics and Precision Engineering Vol. 18, Issue 10, Pages: 2123-2129(2010)
- 作者机构：
  
  南开大学现代光学研究所教育部光电信息技术与科学重点实验室天津,300071
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20101810.2123
  CLC： TH741.5;TN312.8
- Received：09 March 2010，
  
  Revised：05 April 2010，
  
  Published Online：28 October 2010，
  
  Published：20 October 2010
- 稿件说明：
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赵星, 吴宏超, 宋丽培, 方志良. 微型投影机自由曲面LED聚光器的设计[J]. 光学精密工程, 2010,18(10): 2123-2129

ZHAO Xing, WU Hong-chao, SONG Li-pei, FANG Zhi-liang. Design of freeform LED concentrator for micro-projector[J]. Editorial Office of Optics and Precision Engineering , 2010,18(10): 2123-2129
赵星, 吴宏超, 宋丽培, 方志良. 微型投影机自由曲面LED聚光器的设计[J]. 光学精密工程, 2010,18(10): 2123-2129 DOI： 10.3788/OPE.20101810.2123.

ZHAO Xing, WU Hong-chao, SONG Li-pei, FANG Zhi-liang. Design of freeform LED concentrator for micro-projector[J]. Editorial Office of Optics and Precision Engineering , 2010,18(10): 2123-2129 DOI： 10.3788/OPE.20101810.2123.

摘要

为提高LED微型投影机中光学引擎的效率和结构紧凑性

研究了自由曲面LED聚光器结构和工作原理

设计了含有折射和反射自由曲面的LED聚光器。采用非成像理论和同时多表面设计方法

计算并获得了聚光器折射和反射两个自由曲面在子午截面内的各点坐标

利用聚光器的旋转对称性得到了其在三维空间内的面形数据。设计结果的光学建模仿真分析表明:所得聚光器能够有效地收集大功率LED光源的能量

并将光束发散角控制在12内

其光能收集率达到71％。与采用反射式聚光器的设计方案相比

光能收集率提高了20％

而体积则下降了70％

有效地提高了光学引擎的效率和紧凑性。本项设计对LED微型投影仪的小型化具有指导和借鉴作用。

Abstract

The structure and working principle of a freeform LED concentrator were researched and a compact LED concentrator with refractive and reflective freeform surfaces for the micro-projector was designed to improve the concentration efficiency and to compress the volume. Based on non-imaging optics and the method of simultaneous multi-surfaces

the curves of freeform surfaces in the meridian planes were calculated

then the 3D structure of the concentrator was obtained by rotating the curves along

axis. The simulation result confirms that the concentrator can collect the energy from high power LED sources effectively with a collection efficiency of 71% and can control the divergence angle within 12. Compared with conventional reflective ones

this new concentrator increases the collection efficiency by 20% and compresses the volume by 70%. The design can provide a reference for the microminiaturization of LED micro-projectors.

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references

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