Analysis and Calculation of Rotating Polygonal Scanner in Laser Scanning Imaging System

Min, 许敏 Xu; Jiasheng, 胡家升 Hu

doi:10.3788/cjl20083505.0782

Cited by 4 publications

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“…Optical non-contact three-dimensional (3D) shape measurement techniques based on computer vision are used in a lot of applications [1] . Some common techniques include stereo-vision [2] , laser scanning [3] , structured light [4] , interferometry [5] , and so on. Among all these techniques, structured light based techniques are increasingly used due to their excellent characteristics.…”

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一种三维形貌测量系统的基于误差补偿的系统标定三步法

et al. 2010

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System calibration, which usually involves complicated and time-consuming procedures, is crucial for any three-dimensional (3D) shape measurement system based on vision. A novel improved method is proposed for accurate calibration of such a measurement system. The system accuracy is improved with considering the nonlinear measurement error created by the difference between the system model and real measurement environment. We use Levenberg-Marquardt optimization algorithm to compensate the error and get a good result. The improved method has a 50% improvement of re-projection accuracy compared with our previous method. The measurement accuracy is maintained well within 1.5% of the overall measurement depth range.

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一种三维形貌测量系统的基于误差补偿的系统标定三步法

et al. 2010

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Introduction

Li¹

2018

Double-Prism Multi-Mode Scanning: Principles and Technology

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An analog notch filter for piezoelectric optical scanner

Chen

Xiong

et al. 2010

Front. Optoelectron. China

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The optical scanner is one of the most important components in free-space optical communications, airborne and space-based lidars, adaptive optics, and so on. The performance of an optical scanner is frequently limited by the presence of mechanical resonances. This paper presents an analog notch filter with adjustable function to reject the mechanical resonances of the optical scanner. First of all, the structure and work principle of the piezoelectric optical scanner are introduced. Furthermore, the frequency sweep method based on virtual instruments is used to gain the natural frequency of the piezoelectric optical scanner. Then, the notch filters in series are used to reduce the oscillation of the scanner at the resonance frequencies. A variety of scanning experiments were carried out. After the introduction of the notch filter, the non-linearity was reduced to AE1.1% from AE2.1%. The linearity performance was greatly improved.

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Analysis and Calculation of Rotating Polygonal Scanner in Laser Scanning Imaging System

Cited by 4 publications

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一种三维形貌测量系统的基于误差补偿的系统标定三步法

一种三维形貌测量系统的基于误差补偿的系统标定三步法

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An analog notch filter for piezoelectric optical scanner

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