METROLOGY

New method for measuring dynamic response of small components by fringe projection

[+] Author Affiliations
Cho J. Tay, Chenggen Quan, Huai M. Shang, T. Wu, Shihua Wang

National University of Singapore, Department of Mechanical Engineering, 10 Kent Ridge Crescent, Singapore, 119260

Opt. Eng. 42(6), 1715-1720 (Jun 01, 2003). doi:10.1117/1.1570824
History: Received Sep. 3, 2002; Revised Nov. 1, 2002; Accepted Nov. 4, 2002; Online May 21, 2003
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We describe the use of an optical fringe projection method to measure the dynamic response of small components. In this method, sinusoidal fringes are projected on a small component using a programmable liquid crystal display (LCD) projector and a long-working-distance microscope (LDM). The image of the fringe pattern is captured by another LDM and a high-speed camera and subsequently processed by the fast Fourier transform (FFT) technique. A simple procedure is described that enables calibration of the optical setup for subsequent amplitude and frequency measurement of small vibrating components. A method that enhances the detection range of the system is also included. © 2003 Society of Photo-Optical Instrumentation Engineers.

© 2003 Society of Photo-Optical Instrumentation Engineers

Citation

Cho J. Tay ; Chenggen Quan ; Huai M. Shang ; T. Wu and Shihua Wang
"New method for measuring dynamic response of small components by fringe projection", Opt. Eng. 42(6), 1715-1720 (Jun 01, 2003). ; http://dx.doi.org/10.1117/1.1570824


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