Stricker J
Opt Lett. 1985 Jun 1;10(6):247-9. doi: 10.1364/ol.10.000247.
An electronic heterodyne technique is described for the readout of fringes in moiré deflectometry. The technique is based on phase measurements of signals generated by a photodetector observing the light transmitted through a traveling moiré fringe pattern. The phase of the signal is proportional to the fringe deviation and thus to the deflection angle of the light ray. The phase is measured on line by a standard phase meter with an accuracy of 1 degrees or 1:360 of a fringe. The technique, which is precise and sensitive, is demonstrated by detecting and measuring a fringe shift of 0.15 mm corresponding to 0.029 of a fringe.
本文描述了一种用于莫尔偏折术中条纹读出的电子外差技术。该技术基于对光电探测器所产生信号的相位测量，该光电探测器观测透过移动莫尔条纹图案的光。信号的相位与条纹偏差成正比，进而与光线的偏转角成正比。通过标准相位计在线测量相位，精度可达1度或条纹的1:360。该技术精确且灵敏，通过检测和测量对应于0.029条纹的0.15毫米条纹位移得以证明。
