Yonemura M
Yamanashi University, Precision Engineering Department, Takeda, Kofu 400, Japan.
Appl Opt. 1982 Oct 15;21(20):3652-8. doi: 10.1364/AO.21.003652.
A contouring method by spatial frequency modulation using hologram interferometry is presented. The principle is that Young's fringes produced by tilting the illumination ray are modulated by the object shape and demodulated by tilting the observation ray to generate depth contours. The problems of fringe localization and visibility in the arrangements of Fresnel holography and Fourier transform holography are studied. This method has the advantages that the sensitivity and the standard plane orientation are continuously variable, and high sensitivity and large measurable depth can be achieved for diffuse surface objects.
提出了一种利用全息干涉术通过空间频率调制进行轮廓测量的方法。其原理是，由倾斜照明光线产生的杨氏条纹被物体形状调制，并通过倾斜观察光线进行解调以生成深度轮廓。研究了菲涅耳全息术和傅里叶变换全息术装置中条纹定位和可见性的问题。该方法具有灵敏度和标准平面取向可连续变化的优点，并且对于漫反射表面物体可实现高灵敏度和大的可测量深度。
