期刊
IEEE-ASME TRANSACTIONS ON MECHATRONICS
卷 21, 期 4, 页码 1924-1934出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TMECH.2016.2536784
关键词
Machine vision; optical fiber alignment; stereo microvision; telecentric camera
类别
资金
- Natural Science Foundation of China [91223201]
- Natural Science Foundation of Guangdong Province [S2013030013355]
- Scientific and Technological Project of Guangzhou [2015090330001]
- State Scholarship Fund [201506155012]
- State Key Laboratory of Mechanical System and Vibration [MSV201501]
Optical fiber alignment plays an important role in assembling an optical fiber-based system. Proper alignment can improve optical transmission efficiency of the spliced fiber. As for traditional methods, passive alignment has its drawback of less accuracy, and the active method based on optical power sensing is complex and often cannot find the best solution. In this paper, a novel precision closed-loop method for optical fiber alignment based on telecentric lens is introduced. First, to improve the measurement accuracy of the binocular vision system, a quick and high-precision image-processing algorithm for the glass core of an optical fiber is proposed. Then, a stereomatching problem is solved by combining the epipolar constraint with the geometry constraint especially for telecentric lens, and the 3-D recovery of the optical fibers is achieved. Finally, with the help of a proposed simple eye-to-hand calibration for this microalignment system, a coarse-to-fine strategy is put forward to deal with this five-degree-of-freedom alignment task. The experimental results showed that the proposed method had high performance such as prominent precision and strong robustness in 3-D optical fiber alignment.
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