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|Title:||In situ monitoring of object beam expander noise in speckle correlation interferometry|
|Authors:||Ng, T.W. |
|Citation:||Ng, T.W., Wong, T.H., Chau, F.S. (1995). In situ monitoring of object beam expander noise in speckle correlation interferometry. Pure and Applied Optics: Journal of the European Optical Society Part A 4 (2) : 71-77. ScholarBank@NUS Repository. https://doi.org/10.1088/0963-9659/4/2/003|
|Abstract:||Expanded beams used for object illumination in industrial speckle correlation interferometry are susceptible to noise arising from dirt particles and defects found in the beam expanders. This results in a degeneration of the fringe information. To ensure the integrity of this information, an objective means of monitoring in situ the extent of expander noise is required. In this paper, a practical and cost-effective method based on digital spectral analysis is proposed and demonstrated.|
|Source Title:||Pure and Applied Optics: Journal of the European Optical Society Part A|
|Appears in Collections:||Staff Publications|
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