<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The characterization of surface micro-roughness is investigated by using off-specular measurements of polarized optical scattering. In the measurement system, the detection angles of optical scattering are defined by the vertical and level scattering angles. The rotating mechanism of angles is controlled by stepper motors. Waveplate and polarizer are used to adjust light polarization and detection. We conduct the optical scattering measurements by using four standard metal sheets of surface roughness. The nominal values (Ra) of standard micro-roughness are 1.6 μm, 0.8 μm, 0.4 μm, and 0.1 μm, respectively. Samples with different surface roughness are evaluated with the utilization of laser sources at three incident wavelengths. These polarized images are analyzed using a computer program to obtain the distribution of light intensity. The results show great correlation between the metal surface roughness and polarization states. This measurement system can be used to quickly and accurately distinguish between different surfaces and properties.</p></abstract>

The characterization of surface micro-roughness is investigated by using off-specular measurements of polarized optical scattering. In the measurement system, the detection angles of optical scattering are defined by the vertical and level scattering angles. The rotating mechanism of angles is controlled by stepper motors. Waveplate and polarizer are used to adjust light polarization and detection. We conduct the optical scattering measurements by using four standard metal sheets of surface roughness. The nominal values (Ra) of standard micro-roughness are 1.6 μm, 0.8 μm, 0.4 μm, and 0.1 μm, respectively. Samples with different surface roughness are evaluated with the utilization of laser sources at three incident wavelengths. These polarized images are analyzed using a computer program to obtain the distribution of light intensity. The results show great correlation between the metal surface roughness and polarization states. This measurement system can be used to quickly and accurately distinguish between different surfaces and properties.

Characterization of Surface Micro-Roughness by Off-Specular Measurements of Polarized Optical Scattering

Measurement Science Review

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The characterization of surface micro-roughness is investigated by using off-specular measurements of polarized optical scattering. In the measurement system,...

Characterization of Surface Micro-Roughness by Off-Specular Measurements of Polarized Optical Scattering

Published Online: Nov 21, 2019

Page range: 257 - 263

Received: Jun 04, 2019

Accepted: Oct 24, 2019

DOI: https://doi.org/10.2478/msr-2019-0033

Keywords
Optical scattering, polarization, micro-roughness

© 2019 Cheng-Yang Liu et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Characterization of Surface Micro-Roughness by Off-Specular Measurements of Polarized Optical Scattering

Published Online: Nov 21, 2019

Page range: 257 - 263

Received: Jun 04, 2019

Accepted: Oct 24, 2019

DOI: https://doi.org/10.2478/msr-2019-0033

KeywordsOptical scattering, polarization, micro-roughness

© 2019 Cheng-Yang Liu et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
Optical scattering, polarization, micro-roughness