Absolute angle-measurement with a dihedral mirror of the multi-longitudinal mode laser self-mixing sensor |
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| Affiliation: | 1. Key Laboratory of Opto-Electronic Information Acquisition and Manipulation of Ministry of Education, Anhui University, Jiulong Road 111#, Hefei 230601, China;2. Institute of Physical Science and Information Technology, Anhui University, China;3. National Synchrotron Radiation Laboratory, University of Science and Technology of China (USTC), Hefei, Anhui 230029, China;1. Key Laboratory of Opto-Electronic Information Acquisition and Manipulation of Ministry of Education, Anhui University, Jiulong Road 111#, Hefei 230601, China;2. Institute of Physical Science and Information Technology, Anhui University, China |
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| Abstract: | In this paper, a static multi-longitudinal mode laser self-mixing absolute angle measurement system is developed to accurately monitor the deflection angle. The experimental results show that this multi-longitudinal mode laser angle sensor is capable of effectively measuring the deflection angle of the vertical dihedral mirror. The angle-measurement range and resolution of the self-mixing experimental sensing system can be obtained as ±22.0° and 0.008°, respectively. Furthermore, in-depth analysis of the angle-measurement error and related error sources are performed, of which the absolute error is less than 0.37° that demonstrates the good reliability and practicality of the self-mixing angle sensor. |
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| Keywords: | Self-mixing Angle sensor Dihedral mirror Multi-longitudinal mode laser Error |
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