Freeform surface design for a LED based collimating lens

Qiaosong Zhang; Chunyun Xu; Haobo Cheng; Hon Yuen Tam

doi:10.7517/j.issn.1674-0475.2016.01.036

Freeform surface design for a LED based collimating lens

Qiaosong Zhang, Chunyun Xu, Haobo Cheng^*, Hon Yuen Tam

^*Corresponding author for this work

School of Optics and Photonics

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

1 Citation (Scopus)

Abstract

A freeform collimating lens is designed based on a single lighting emitting diode (LED) to achieve collimated lightbeam. According to the principle of geometric optics, the method does not need solve the complex partial differential equations which is simple. The collimating lens consists of an inner freeform refractive surface, a part of spherical surface, a total internal reflection and a flat plane surface. The discrete points of freeform surface profile curve are calculated by Matlab and fitted the points to the three-dimensional entity model by Solidworks. In order to investigate the effect of LED light source size to collimating lens flare image, non-sequential ray trace is analyzed by Tracepro software. Computer simulation results show that an optical efficiency of 86.258% and a semi-view-angle of 3.3° is achieved for a 1 mm LED.

Original language	English
Pages (from-to)	36-42
Number of pages	7
Journal	Yingxiang Kexue yu Guanghuaxue/Imaging Science and Photochemistry
Volume	34
Issue number	1
DOIs	https://doi.org/10.7517/j.issn.1674-0475.2016.01.036
Publication status	Published - 1 Jan 2016

Keywords

Collimating
Freeform surface
LED
Secondary optical design

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10.7517/j.issn.1674-0475.2016.01.036

Cite this

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title = "Freeform surface design for a LED based collimating lens",

abstract = "A freeform collimating lens is designed based on a single lighting emitting diode (LED) to achieve collimated lightbeam. According to the principle of geometric optics, the method does not need solve the complex partial differential equations which is simple. The collimating lens consists of an inner freeform refractive surface, a part of spherical surface, a total internal reflection and a flat plane surface. The discrete points of freeform surface profile curve are calculated by Matlab and fitted the points to the three-dimensional entity model by Solidworks. In order to investigate the effect of LED light source size to collimating lens flare image, non-sequential ray trace is analyzed by Tracepro software. Computer simulation results show that an optical efficiency of 86.258% and a semi-view-angle of 3.3° is achieved for a 1 mm LED.",

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T1 - Freeform surface design for a LED based collimating lens

AU - Zhang, Qiaosong

AU - Xu, Chunyun

AU - Cheng, Haobo

AU - Tam, Hon Yuen

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Y1 - 2016/1/1

N2 - A freeform collimating lens is designed based on a single lighting emitting diode (LED) to achieve collimated lightbeam. According to the principle of geometric optics, the method does not need solve the complex partial differential equations which is simple. The collimating lens consists of an inner freeform refractive surface, a part of spherical surface, a total internal reflection and a flat plane surface. The discrete points of freeform surface profile curve are calculated by Matlab and fitted the points to the three-dimensional entity model by Solidworks. In order to investigate the effect of LED light source size to collimating lens flare image, non-sequential ray trace is analyzed by Tracepro software. Computer simulation results show that an optical efficiency of 86.258% and a semi-view-angle of 3.3° is achieved for a 1 mm LED.

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Freeform surface design for a LED based collimating lens

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