Abstract
Dynamic full-field three-dimensional sensing of specular reflective surfaces can be conveniently implemented with fringe reflection technique. A monoscopic fringe reflectometric system can be adopted as a simple measuring setup. With the assistance of the windowed Fourier ridges method as an advanced fringe demodulation technique, only one cross grating is needed to reconstruct the three-dimensional surface shape changes. A suitable calibration enables determination of the actual three-dimensional surface profile. Experimental results of water wave variations are shown to demonstrate the feasibility of the proposed approach.
Highlights
Three-dimensional (3D) sensing for specular objects is required in many applications in research and industry [1,2,3,4,5,6]
Tutsch [9] proposed a deflectometric system with fringe reflection technique, which consists of one camera, one Liquid Crystal Display (LCD) screen, and a translation stage
This work concentrates on dynamic shape measurement for specular reflective surfaces with monoscopic fringe reflectometric technique
Summary
Three-dimensional (3D) sensing for specular objects is required in many applications in research and industry [1,2,3,4,5,6]. A practical and suitable method to measure specular reflective surfaces is phase measuring reflectometry (or deflectometry) with fringe reflection technique [7,8,9]. Tutsch [9] proposed a deflectometric system with fringe reflection technique, which consists of one camera, one Liquid Crystal Display (LCD) screen, and a translation stage This method requires mechanical translation of the LCD screen during both calibration and measurement procedures. Bothe and et al [7] proposed a monoscopic fringe reflectometric method without mechanical movement This method is suitable and applicable for measuring almost flat specular surfaces, since the height-slope ambiguity is not solved but approximated with regularization that height values can be assumed roughly known a priori. This work concentrates on dynamic shape measurement for specular reflective surfaces with monoscopic fringe reflectometric technique.
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