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文章介绍用“光点图”计算汽车前灯光强分布的方法。这种计算方法建立在基元反射理论上。用这种理论可以计算由几部分组成的汽车前灯的发光强度，前提是每一部分都能用数学方程表示。根据上述理论编制的计算机程序可以对结构很复杂的前灯进行计算和设计
This article describes the use of “spot map” to calculate the light intensity of the car headlight distribution. This calculation method is based on the elementary reflection theory. Using this theory it is possible to calculate the luminous intensity of a car headlight consisting of several parts, provided that each part is represented by a mathematical equation. The computer program compiled according to the above theory can calculate and design the headlamp with complicated structure