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Title: TDI imaging - a tool for profilometry and automated visual inspection
Authors: Sajan, M.R. 
Tay, C.J. 
Shang, H.M. 
Asundi, A. 
Issue Date: Jun-1998
Citation: Sajan, M.R., Tay, C.J., Shang, H.M., Asundi, A. (1998-06). TDI imaging - a tool for profilometry and automated visual inspection. Optics and Lasers in Engineering 29 (6) : 403-411. ScholarBank@NUS Repository.
Abstract: TDI imaging is introduced as a solution to industrial web inspection under low-light illumination. In addition to the original purpose of recording clear blur-free images of the objects moving over industrial platforms, it can also be used as a tool for profilometry and automated visual inspection when coupled with proper structured light illumination modules. This paper illustrates a system employing a pulsed laser diode, uniform intensity line generating optics and a high-speed TDI imager for recording structured light patterns from rotating cylindrical objects. Defect or shape information is coded as distortions in a regular grating pattern recorded by the TDI imager. The shape or defect profile is retrieved by employing Fourier transform and scanning spatial phase detection techniques.
Source Title: Optics and Lasers in Engineering
ISSN: 01438166
DOI: 10.1016/S0143-8166(97)00106-1
Appears in Collections:Staff Publications

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