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提出一种根据电子学全息原理测量两平行光束微小夹角的方法，其基本思路是，用ＣＣＤ作为记录介质经图像采集卡将双光束干涉条纹图像采集于计算机中，并通过离散傅里叶变换实现干涉条纹图像从空域到频域的变换，根据所得到的频谱分布图，获取条纹数并算出条纹间距，进而推算出两平行光束的夹角。详细地阐述了该方法的原理，通过实验验证了其测量微小光束夹角的可行性，对其测量精度、范围和角度分辨率作了定量地分析。
A method of measuring the small angle of two parallel beams based on the principle of electronic holography is proposed. The basic idea is to use the CCD as the recording medium to acquire the double-beam interference fringe pattern in the computer through the image acquisition card, and then through the discrete Fourier transform According to the spectrum distribution obtained, the number of fringes is obtained and the fringe spacing is calculated, and then the angle between two parallel light beams is deduced. The principle of this method is expounded in detail. The feasibility of measuring the included angle of the microbeam is verified by experiments, and the measurement accuracy, range and angular resolution are quantitatively analyzed.