【作者】 王亿；

【导师】 牟同升；

【作者基本信息】 浙江大学 ， 光学工程， 2011， 硕士

【摘要】 与传统光源相比,LED照明光源具有体积小、功耗低、寿命长、无污染等优点。近年来,随着LED发光效率的提升和应用技术的突飞猛进,LED照明光源将成为继白炽灯,荧光灯,气体放电灯之后的主要照明光源。LED光源,尤其是基于GaN蓝光芯片,涂覆荧光粉的白光LED照明光源,颜色在空间上的不一致,将严重影响到照明的视觉效果。因此,LED照明光源的空间颜色测量,成为当前国际上的重要研究课题。本文从光色度学的基本原理出发,讨论分析了LED光源的空间色度特性,研究了一种旋转反光镜式的空间色度分布测量方法。为了实现空间的快速高精度色度测量,作者提出了采用三刺激值色度计配合普通的CCD光谱仪进行测量的方法,提出了三种校正算法来对色度计的测量结果进行校正,并进行了理论模拟和实验分析来评价各种算法的优劣。为了提高CCD光谱仪的测量精度,我们利用汞灯和单色仪两种方法来对光谱仪进行定标；提出相关方案来对CCD光谱仪进行非线性校正；利用单色仪来得到CCD光谱仪的SDF响应,利用相关的矩阵算法来对CCD光谱仪中的杂散光进行校正,取得了较好的效果。更多还原

【Abstract】 Compared with conventional light sources, LED light source has a small size, low power consumption, long life, no pollution and so on. In recent years, with the improvement of LED luminous efficiency and application of the technology, LED light source will become the main light source after the incandescent lamp, fluorescent lamp and gas discharge lamp. Spatial chromaticity difference of LED light source, in particular GaN-based blue chip, phosphor coated white LED light source, will seriously affect the visual effects of lighting. Therefore, the measurement of LED light source’s spatial chromaticity difference becomes a major international research project.Basing on the principle of photometry and colorimetry, this paper discussed the LED’s spatial chromaticity difference and shown a new method to measure it. In order to achieve rapid high-precision measurement of spatial chromaticity difference, the author proposed to use a tristimulus colorimeter for color measurement with a common CCD spectrometer for correction. Three methods were used to correct the measurement results of the tristimulus colorimeter, theoretical simulation and experimental analysis were done to evaluate the advantages and disadvantages of each method.To improve the measurement accuracy of CCD spectrometer, we used mercury lamp and monochromator to calibrate the wavelength of spectrometer, made relevant programs on the linear calibration of the CCD spectrometer, used the monochromator to get the SDF response of the CCD spectrometer, used matrix algorithm to calibrate the stray light of the CCD spectrometer, and achieved good results.更多还原