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Proceedings Paper

CCD photoelectric measurements in calibrators for vehicle headlamp tester
Author(s): Yi Lu; Zai Luo; Guiying Yu; Wei-Bin Zhu
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Paper Abstract

Vehicle headlamp is a very important component for safe driving. The calibration of vehicle headlamp must be done in accordance with standard (JJG967-2001), such as the distribution of shade and the luminosity distribution of far light and close light. Photoelectric measurements, for example, electronic scanning system, dot array of photoelectric cell system and CCD measurement system, were used to research the shade distribution and the luminosity distribution. In order to expedite the measuring process and acquire more accurate parameters, CCD measurement system is proposed to measure more characteristic parameters of headlamp at higher speed. Image processing technology is utilized to get the characteristic parameters such as luminous intensity and optic axis deviation angle for headlamp. Some software algorithms of digital image processing can be used to achieve an uncertainty of luminous intensity of less than or equal to 2%, and an uncertainty of deviation angle of optic axis of less than or equal to 1.6 minute. Experimental results showed that it has many advantages such as high precision, good repetition.

Paper Details

Date Published: 12 January 2009
PDF: 6 pages
Proc. SPIE 7133, Fifth International Symposium on Instrumentation Science and Technology, 71333T (12 January 2009); doi: 10.1117/12.807528
Show Author Affiliations
Yi Lu, China Jiliang Univ. (China)
Zai Luo, China Jiliang Univ. (China)
Guiying Yu, China Jiliang Univ. (China)
Wei-Bin Zhu, China Jiliang Univ. (China)


Published in SPIE Proceedings Vol. 7133:
Fifth International Symposium on Instrumentation Science and Technology

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