Software solutions to quality enhancement of moire fringes in displacement measuring

Shaojing Su; Zhiping Huang; Haibao Lu; Yimeng Zhang

doi:10.1117/12.401796

5 October 2000 Software solutions to quality enhancement of moire fringes in displacement measuring

Shaojing Su, Zhiping Huang, Haibao Lu, Yimeng Zhang

Proceedings Volume 4223, Instruments for Optics and Optoelectronic Inspection and Control; (2000) https://doi.org/10.1117/12.401796
Event: Optics and Optoelectronic Inspection and Control: Techniques, Applications, and Instruments, 2000, Beijing, China

Abstract

To acquire high precision of subdivision in optical displacement measuring, the signal quality of moire fringes must be kept reliable and constant. Several software solutions to enhance the signal quality of moire fringes are provided in this paper. The process platform is based on SHARC DSP and flash sample technique. Three methods of adaptive digital filter are used respectively to eliminate the unwanted drift of signal, improve the orthogonality of two channels of sine and cosine intensity signals of moire fringe, and keep the amplitude of the signal constant. Firstly, the operation procedure of the acquisition and process system is described, then the principle of the adaptive signal process is explained. And at the same time, the result of the experiment is also listed to show the effects of the process software in digital signal processor.

Citation Download Citation

Shaojing Su, Zhiping Huang, Haibao Lu, and Yimeng Zhang "Software solutions to quality enhancement of moire fringes in displacement measuring", Proc. SPIE 4223, Instruments for Optics and Optoelectronic Inspection and Control, (5 October 2000); https://doi.org/10.1117/12.401796

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