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本文推导了位于积分球中心处的光源在球内壁及挡屏表面的漫射照度分布的近似矩阵计算方法。此计算可归结为根据积分球的基本参数确定“光通量交换系数矩阵”的矩阵元问题。 对几种不同光强空间分布的光源在积分球内壁产生的漫射照度分布进行了计算,并将对两个光源的计算结果与用R.Brown的数值法的结果作了比较,符合较好。
This paper deduces the approximate matrix calculation method of the diffuse illumination distribution of the light source on the inner wall and the screen of the sphere located at the center of the integrating sphere. This calculation can be attributed to determining the matrix element problem of the “luminous flux exchange coefficient matrix” based on the basic parameters of the integrating sphere. The distribution of diffuse illuminance on the inner wall of the integrating sphere is calculated for several light sources with different light intensity distributions. The calculated results of two light sources are compared with those obtained by R. Brown’s numerical method, which is in good agreement .