A portable inspection system to estimate direct glare of various LED modules

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

doi:10.1117/12.2189599

17 July 2015 A portable inspection system to estimate direct glare of various LED modules

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

Author Affiliations +

Proceedings Volume 9524, International Conference on Optical and Photonic Engineering (icOPEN 2015); 95241X (2015) https://doi.org/10.1117/12.2189599
Event: International Conference on Optical and Photonic Engineering (icOPEN2015), 2015, Singapore, Singapore

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.

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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, and Tsung-Xian Lee "A portable inspection system to estimate direct glare of various LED modules", Proc. SPIE 9524, International Conference on Optical and Photonic Engineering (icOPEN 2015), 95241X (17 July 2015); https://doi.org/10.1117/12.2189599

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