Development and Research of 2-D Optical Alignment System with Vision-Controlled Micro-Positioner

• Main Authors: Chen, Yen-Fu, 陳彥甫
• Other Authors: 黃光裕
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/05831575700794072970

碩士 === 國立臺灣大學 === 機械工程學研究所 === 90 === The aim of this thesis is to develope a 2-D optical alignment system, which integrates vision control and micro piezo-actuated positioner to perform fiber alignment. Then the performance of this precision alignment system based on machine vision was studied. In the integrated design area of hardware, there are 2-axes piezo micro-positioner, high-voltage amplifier, optical fiber holder and vision control system developed. In software area, image processing and control interface are developed. A complementary actuator structure is proposed as a new configuration of piezo micro-positioner, which consists of two opposite and complementary piezo actuators. A series of experiments are carried out to prove the improvement of displacement resolution, linearity, resonance frequency and creep effect. Furthermore, various methods of hysteresis compensation are tested and analyzed. A theoretical model is established to simulate the behavior of this complementary piezo structure, and piezo micro-positioner’s step response tests are carried out, too. The vision control system with two 90°angle prisms can detect the fiber’s positions from horizontal and vertical viewpoints. Then CCD camera transfers the image information of fibers into computer. After calculation processing driving voltage for micro positioners are amplified by a self-developed high-voltage amplifier. Finally, different performance testings such as alignment efficiency, speed, and repeatability are carried out. According to testings and analytical results, all possible coupling losses and their influential factors for fiber alignment are discovered. And some adaptive improving methods are worked out.