Vargas J, Quiroga J Antonio, Alvarez-Herrero A, Belenguer T
Laboratorio de Instrumentación Espacial, Instituto Nacional de Técnica Aeroespacial, Madrid, Spain.
Opt Express. 2011 Jan 17;19(2):584-96. doi: 10.1364/OE.19.000584.
The presence of uncontrolled mechanical vibrations is typically the main precision-limiting factor of a phase-shifting interferometer. We present a method that instead of trying to insolate vibrations; it takes advantage of their presence to produce the different phase-steps. The method is based on spatial and time domain processing techniques to compute first the different unknown phase-steps and then reconstruct the phase from these tilt-shifted interferograms. In order to compensate the camera movement, it is needed to perform an affine registration process between the different interferograms. Simulated and experimental results demonstrate the effectiveness of the proposed technique without the use of any phase-shifter device.
未受控制的机械振动的存在通常是相移干涉仪的主要精度限制因素。我们提出了一种方法，该方法不是试图隔离振动，而是利用振动的存在来产生不同的相移步长。该方法基于空间和时域处理技术，首先计算不同的未知相移步长，然后从这些倾斜移位干涉图中重建相位。为了补偿相机的移动，需要在不同的干涉图之间执行仿射配准过程。模拟和实验结果证明了所提出技术在不使用任何相移器装置的情况下的有效性。
