Somayaji Manjunath, Bhakta Vikrant R, Christensen Marc P
Department of Electrical Engineering, Southern Methodist University, Dallas, Texas 75275-0338, USA.
Opt Express. 2012 Jan 16;20(2):1878-95. doi: 10.1364/OE.20.001878.
The optical transfer function of a cubic phase mask wavefront coding imaging system is experimentally measured across the entire range of defocus values encompassing the system's functional limits. The results are compared against mathematical expressions describing the spatial frequency response of these computational imagers. Experimental data shows that the observed modulation and phase transfer functions, available spatial frequency bandwidth and design range of this imaging system strongly agree with previously published mathematical analyses. An imaging system characterization application is also presented wherein it is shown that the phase transfer function is more robust than the modulation transfer function in estimating the strength of the cubic phase mask.
对立方相位掩膜波前编码成像系统的光学传递函数在涵盖系统功能极限的整个离焦值范围内进行了实验测量。将结果与描述这些计算成像器空间频率响应的数学表达式进行了比较。实验数据表明，该成像系统观察到的调制和相位传递函数、可用空间频率带宽和设计范围与先前发表的数学分析结果高度吻合。还介绍了一种成像系统特性表征应用，结果表明在估计立方相位掩膜的强度时，相位传递函数比调制传递函数更稳健。
