Deformation measurement for a rotating deformable lap based on inverse fringe projection

Min Liao; Qican Zhang

doi:10.1117/12.2079368

4 March 2015 Deformation measurement for a rotating deformable lap based on inverse fringe projection

Min Liao, Qican Zhang

Proceedings Volume 9302, International Conference on Experimental Mechanics 2014; 93022X (2015) https://doi.org/10.1117/12.2079368
Event: International Conference on Experimental Mechanics 2014, 2014, Singapore, Singapore

Abstract

The active deformable lap (also namely stressed lap) is an efficient polishing tool in optical manufacturing. To measure the dynamic deformation caused by outside force on a deformable lap is important and helpful to the opticians to ensure the performance of a deformable lap as expected. In this paper, a manual deformable lap was designed to simulate the dynamic deformation of an active stressed lap, and a measurement system was developed based on inverse projected fringe technique to restore the 3D shape. A redesigned inverse fringe has been projected onto the surface of the measured lap, and the deformations of the tested lap become much obvious and can be easily and quickly evaluated by Fourier fringe analysis. Compared with the conventional projection, this technique is more obvious, and it should be a promising one in the deformation measurement of the active stressed lap in optical manufacturing.

Citation Download Citation

Min Liao and Qican Zhang "Deformation measurement for a rotating deformable lap based on inverse fringe projection", Proc. SPIE 9302, International Conference on Experimental Mechanics 2014, 93022X (4 March 2015); https://doi.org/10.1117/12.2079368

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KEYWORDS

Fringe analysis

Head

Cameras

Optics manufacturing

Projection systems

3D metrology

Phase shift keying

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