Cao Zhaolou, Wang Keyi
Appl Opt. 2014 Nov 1;53(31):7325-30. doi: 10.1364/AO.53.007325.
Rotating point spread function (PSF) provides a novel approach to detect three-dimensional position. As the optical aberration of a system can hardly be removed completely, effects of aberration on the PSF were studied both analytically and numerically. Results show that the intensity pattern is robust to both astigmatism and coma, while astigmatism affects the rotating angle of the PSF, and coma affects the lateral position of the PSF.
旋转点扩散函数（PSF）提供了一种检测三维位置的新方法。由于系统的光学像差很难完全消除，因此通过解析和数值方法研究了像差对PSF的影响。结果表明，强度图案对像散和彗差均具有鲁棒性，而像散影响PSF的旋转角度，彗差影响PSF的横向位置。
