CCD photoelectric measurements in calibrators for vehicle headlamp tester

Yi Lu; Zai Luo; Guiying Yu; Wei-Bin Zhu

doi:10.1117/12.807528

12 January 2009 CCD photoelectric measurements in calibrators for vehicle headlamp tester

Yi Lu, Zai Luo, Guiying Yu, Wei-Bin Zhu

Proceedings Volume 7133, Fifth International Symposium on Instrumentation Science and Technology; 71333T (2009) https://doi.org/10.1117/12.807528
Event: International Symposium on Instrumentation Science and Technology, 2008, Shenyang, China

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.

Citation Download Citation

Yi Lu, Zai Luo, Guiying Yu, and Wei-Bin Zhu "CCD photoelectric measurements in calibrators for vehicle headlamp tester", Proc. SPIE 7133, Fifth International Symposium on Instrumentation Science and Technology, 71333T (12 January 2009); https://doi.org/10.1117/12.807528

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