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Proceedings Paper

Research on the nonlinearity correction method for the piezoelectric optical scanner in a lidar system
Author(s): Xin Wu; Sihai Chen; Xiaogang Xiong; Benyi Shi; Wei Chen
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Paper Abstract

The laser scanning system of a lidar usually needs a laser scanner with characteristics such as fast linear scanning, small size and small rotational inertia moment. Traditional laser scanners, such as galvanometer and rotating multi-faceted mirror, are difficult to achieve fast linear scanning with low moment of inertia. In order to solve these problems, a piezoelectric optical scanner based on novel piezoelectric actuator is designed in this paper. First of all, the scanner system components based on self-learning feed-forward controller is introduced. Furthermore, the principle and method of amending the scanner hysteresis loop are analyzed. Finally, one-dimensional linear scanning in a wide range of frequencies using the control platform with the core of digital signal processor TMS320F2812 is achieved. The experimental results show that the hysteresis characteristics have been restrained and scanning linear performance of the piezoelectric optical scanner has been remarkably improved in low frequencies. In high frequencies, the nonlinearity of triangle wave scanning is reduces by adding a notch filter circuit which restrained the structure resonance of the scanner. The piezoelectric optical scanner also has other advantages such as large optical scanning angle, high first step resonance frequency, small size and simple structure.

Paper Details

Date Published: 26 October 2010
PDF: 13 pages
Proc. SPIE 7832, Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing VI, 78320T (26 October 2010); doi: 10.1117/12.864188
Show Author Affiliations
Xin Wu, Huazhong Univ. of Science and Technology (China)
Sihai Chen, Huazhong Univ. of Science and Technology (China)
Wuhan National Lab. for Optoelectronics (China)
Xiaogang Xiong, Huazhong Univ. of Science and Technology (China)
Benyi Shi, Huazhong Univ. of Science and Technology (China)
Wei Chen, Huazhong Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 7832:
Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing VI
Upendra N. Singh; Gelsomina Pappalardo, Editor(s)

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