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Optical design of a LED searchlight system
Author(s): Chen Gong; Haiping Xu; Jinhua Liang; Yunfei Liu; Zengquan Yuan
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Paper Abstract

A 1200m visible searchlight system is designed based on photometry and application of geometric optics. To generate intensity distribution of this relatively powerful light beam we propose to use a high power LED and several refractive optical elements, which are composed of two plane-convex lenses and a conventional Fresnel lens. Two plane-convex lenses enable refraction of the side rays from the LED to the front direction which incident on the Fresnel lens. Fresnel lens, in its turn, concentrate the light flux and provide a nearly collimated beam to meet the requirement of forming a well-illuminated area across the road in the far field. Simulation data shows that this searchlight allow generating an appropriate illumination distribution for the long range requirements. A proof-of-concept prototype producing acceptable illuminance is developed.

Paper Details

Date Published: 10 January 2018
PDF: 6 pages
Proc. SPIE 10616, 2017 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, 1061614 (10 January 2018); doi: 10.1117/12.2294610
Show Author Affiliations
Chen Gong, Institute of Electrical Engineering (China)
Haiping Xu, Institute of Electrical Engineering (China)
Jinhua Liang, Institute of Electrical Engineering (China)
Yunfei Liu, Institute of Electrical Engineering (China)
Zengquan Yuan, Institute of Electrical Engineering (China)


Published in SPIE Proceedings Vol. 10616:
2017 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments
Yongtian Wang; Baohua Jia; Kimio Tatsuno; Liquan Dong, Editor(s)

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