本文从理论上得出了用分光光度法(等波长间隔)测量光源色座标时所产生误差的一般表达式,并得到以下结论:不论被测光谱分布是线光谱或连续光谱,用分光光度法等波长间隔逐点测量时,如果系统的响应函数与波长无关,则测到的色座标误差很小;而如果系统的响应函数与波长有关,则测到的色座标对线光谱和连续光谱会产生同数量级的相对误差。 This paper theoretically obtained the general expression of error when measuring the color coordinate of light source by spectrophotometry (equal wavelength interval), and got the following conclusion: No matter the spectral distribution is line spectrum or continuous spectrum, France and other wavelength intervals measured point by point, if the system response function has nothing to do with the wavelength, the measured color coordinate error is small; and if the system response function and the wavelength, the measured color coordinates of the line spectrum and Continuous spectra will produce the same order of magnitude relative error.