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|Title:||Vibration measurement of micro-components by fringe projection method|
Fast Fourier transform (FFT)
White light source
|Source:||Wu, T., Tay, C., Quan, C., Wang, S., Shang, H. (2003). Vibration measurement of micro-components by fringe projection method. Proceedings of SPIE - The International Society for Optical Engineering 5116 II : 912-923. ScholarBank@NUS Repository. https://doi.org/10.1117/12.514242|
|Abstract:||This paper presents an optical fringe projection method for measuring the dynamic micro-components. Using a programmable liquid crystal display (LCD) projector and a long working distance microscope (LDM), sinusoidal fringes are projected onto a micro-component. 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 which enables calibration of the optical setup for subsequent amplitude and frequency measurement of the vibrating components. To overcome the underexposure problem, a white light source (WLS) is incorporated and the dynamic range of the camera is increased by a factor of 6. Discrepancy in the measured vibration amplitude is less than 1%.|
|Source Title:||Proceedings of SPIE - The International Society for Optical Engineering|
|Appears in Collections:||Staff Publications|
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