The method can confirm the Gaussian distribution of optical intensity for the fundamental transverse mode of the He-Ne laser and determine the size of its light spot.
这种方法能够证实氦氖激光基横模的光强分布是高斯分布，能够确定光斑的大小。
Intensity space distribution near image point of optical system is derived based on the accurate amplitude (therefore the intensity) analytic expression for Fresnel diffraction.
根据准确的菲涅耳衍射振幅和光强解析表达式推导出光学系统像点附近的光强空间分布。
The light optical spot area and the optical intensity distribution can be adjusted through software. The non-uniformity of response and the SNR are influenced by the noise of the detector.
光斑大小和光强分布不均的影响可以通过软件校准，象限响应率不均和信噪比受探测器噪声以及处理电路噪声的影响。
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