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从空域和频域两个方面利用新的数学工具对扩大景深的波前编码成像系统的一些重要特性进行了阐释和分析。空域中,主要利用维格纳分布函数的正则投影来分析系统的点扩展函数对离焦像差的变化不敏感特性;频域中,则利用考纽螺线的图解方法来分析系统的光学传递函数对离焦像差的变化不敏感特性。简单讨论了波前编码成像技术所涉及的数字图像处理方法,并且用数值仿真实验验证了波前编码成像系统的这些优越特性。
From the aspects of airspace and frequency domain, some important characteristics of the wavefront coding imaging system for expanding the depth of field are explained and analyzed by using new mathematical tools. Airspace, the main use of the Wigner distribution function of the regular projection to analyze the point spread function of the system is not sensitive to changes in the characteristics of defocused aberrations; frequency domain, the use of Coyote spiral diagram to analyze the system of optical transmission Function is not sensitive to changes in defocus aberration. The digital image processing methods involved in wavefront coding imaging are briefly discussed, and the numerical simulation experiments verify these superior characteristics of the wavefront coding imaging system.