Roughness measurement of paper using speckle
We present a method of measure of the roughness of the paper based on the analysis of a speckle pattern on the surface. Images of speckle over the surface of paper are captured by means of a simple configuration using a laser, beam expander, and a camera charge-coupled device (CCD). Then we use the...
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| Main Author: | |
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| Other Authors: | , , |
| Format: | article |
| Language: | English |
| Published: |
2011
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| Subjects: | |
| Online Access: | http://ridda2.utp.ac.pa/handle/123456789/2817 |
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| Summary: | We present a method of measure of the roughness of the paper based on the analysis of a speckle pattern on the surface. Images of speckle over the surface of paper are captured by means of a simple configuration using a laser, beam expander, and a camera charge-coupled device (CCD). Then we use the normalized covariance function of the fields, leaving the surface to find the roughness. We compare the results obtained with the results obtained with a confocal microscope and the Bendtsen method that is a standard of the paper industry. This method can be considered as a noncontact surface profiling method that can be used online. |
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