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Proceedings Paper

A portable inspection system to estimate direct glare of various LED modules
Author(s): Po-Li Chen; Chun-Hsiang Liao; Hung-Chung Li; Shyh-Jye Jou; Han-Ting Chen; Yu-Hsin Lin; Yu-Hsiang Tang; Wei-Jei Peng; Hui-Jean Kuo; Pei-Li Sun; Tsung-Xian Lee
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Paper Abstract

Glare is caused by both direct and indirect light sources and discomfort glare produces visual discomfort, annoyance, or loss in visual performance and visibility. Direct glare is caused by light sources in the field of view whereas reflected glare is caused by bright reflections from polished or glossy surfaces that are reflected toward an individual. To improve visual comfort of our living environment, a portable inspection system to estimate direct glare of various commercial LED modules with the range of color temperature from 3100 K to 5300 K was developed in this study. The system utilized HDR images to obtain the illumination distribution of LED modules and was first calibrated for brightness and chromaticity and corrected with flat field, dark-corner and curvature by the installed algorithm. The index of direct glare was then automatically estimated after image capturing, and the operator can recognize the performance of LED modules and the possible effects on human being once the index was out of expecting range. In the future, we expect that the quick-response smart inspection system can be applied in several new fields and market, such as home energy diagnostics, environmental lighting and UGR monitoring and popularize it in several new fields.

Paper Details

Date Published: 17 July 2015
PDF: 9 pages
Proc. SPIE 9524, International Conference on Optical and Photonic Engineering (icOPEN 2015), 95241X (17 July 2015); doi: 10.1117/12.2189599
Show Author Affiliations
Po-Li Chen, Instrument Technology Research Ctr. (Taiwan)
Chun-Hsiang Liao, National Taiwan Univ. of Science and Technology (Taiwan)
Hung-Chung Li, National Taiwan Univ. of Science and Technology (Taiwan)
Shyh-Jye Jou, Instrument Technology Research Ctr. (Taiwan)
Han-Ting Chen, Crosscarf (Taiwan)
Yu-Hsin Lin, Instrument Technology Research Ctr. (Taiwan)
Yu-Hsiang Tang, Instrument Technology Research Ctr. (Taiwan)
Wei-Jei Peng, Instrument Technology Research Ctr. (Taiwan)
Hui-Jean Kuo, Instrument Technology Research Ctr. (Taiwan)
Pei-Li Sun, National Taiwan Univ. of Science and Technology (Taiwan)
Tsung-Xian Lee, National Taiwan Univ. of Science and Technology (Taiwan)


Published in SPIE Proceedings Vol. 9524:
International Conference on Optical and Photonic Engineering (icOPEN 2015)
Anand K. Asundi; Yu Fu, Editor(s)

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