Guo Cheng-Shan, Rong Zhen-Yu, Wang Hui-Tian, Wang Yurong, Cai L Z
National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China.
Appl Opt. 2003 Dec 10;42(35):6975-9. doi: 10.1364/ao.42.006975.
We propose a new computer-controlled phase-shifting method based on computer-generated holograms (CGHs) displayed on a spatial light modulator (SLM). In this method the accurate phase shifts required in phase-shifting digital holography or interferometry are induced by a suitable transformation of the encoding patterns of the CGH displayed on a SLM. Both the theoretical analysis and the experimental results demonstrate the feasibility of this approach. We also discuss possible applications of this method in the field of interferometric null testing of aspheres.
我们提出了一种基于在空间光调制器（SLM）上显示的计算机生成全息图（CGH）的新型计算机控制相移方法。在该方法中，相移数字全息术或干涉测量中所需的精确相移是通过对SLM上显示的CGH编码图案进行适当变换来实现的。理论分析和实验结果均证明了该方法的可行性。我们还讨论了该方法在非球面干涉零位检测领域的可能应用。
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