[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.4313/TEEM.2017.18.1.35

Overall Illuminance Uniformity of IRED Lighting in Nighttime CCTV

Sa-Gong, Geon (Hanbit Innovation & Technology Co. Ltd.)
Park, Yung-Jun (Hanbit Innovation & Technology Co. Ltd.)
Park, Jung-Je (Hanbit Innovation & Technology Co. Ltd.)
Lee, Suho (Department of Electrical Engineering, Dong-A University)

Publication Information

Transactions on Electrical and Electronic Materials / v.18, no.1, 2017 , pp. 35-41 More about this Journal

Abstract

This study looks at optimizinge light redistribution to improve the overall illuminance uniformity of commercial IRED modules. To obtain uniform illumination over a prescribed rectangular area, a freeform surface lens was evaluated using TracePro. The LED light overall illuminance uniformity regulated in KSC 7658 was verified using Relux software. Experimental test results showed 0.81 overall illuminance uniformity for rectangular light distribution of LED lights having a radiation angle of $80^{\circ}$ . After fabricating prototype IRED lights based on these simulation results, illuminance performance was observed when used as actual IRED lighting with a nighttime CCTV system. Image observation photographs of the prototype $80^{\circ}$ rectangular IRED lights confirmed that object images can be seen clearly owing to high overall illuminance uniformity, and that dark regions of the CCTV screen were not shown.

Keywords

Light emitting diode; Uniform illuminance; Freeform surface lens; IRED lighting; Overall illuminance uniformity;

Citations & Related Records

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