The divergence Angle of light beam was measured with the method of CCD imaging and computed by second moment method.
通过CCD成像方法对准直后的光束发散角进行了测量，利用二阶矩算法计算出光束发散角。
At paraxial approximation the maximum of the matching function is increasing with increased divergence Angle. For different brightness of pumping light, the optimum value of the Angle is obtained.
发现在旁轴近似下，匹配函数的最大值随泵浦光发散角的增大而增大，在考虑到像散的影响后，得到泵浦光发散角的参考值。
Another important application of diffraction theory is the study of the far field divergence Angle of a collimated light beam.
衍射理论的另一个重要应用就是研究准直光束的远场发散角。
Experiments have verified that the divergence angle of the light after collimation is up to 0.000070.
实验表明，经该方法准直后的光束发散角（会聚角）可达0.00007 度。
Laser compared to other lights has the characteristics of higher power, less divergence Angle, better monochromaticity, shorter light pulse and continuously tunable spectrum output.
激光与其它光相比，具有功率高、发散角小、单色性好，输出的光脉冲窄和输出光谱可连续调谐的特点。
Laser compared to other lights has the characteristics of higher power, less divergence Angle, better monochromaticity, shorter light pulse and continuously tunable spectrum output.
激光与其它光相比，具有功率高、发散角小、单色性好，输出的光脉冲窄和输出光谱可连续调谐的特点。
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