Abstract Title:
Laser Tracking Measurement System using Dual Femtosecond Optical Frequency Comb
Author(s) Name(s)/Company(s)/Title(s):
(1) Zili Zhang, Academy of Opto-electronics, Chinese Academy of Sciences, Associate Professor
(2) Weihu Zhou, Academy of Opto-electronics, Chinese Academy of Sciences, Professor
(3) Dabao Lao, Academy of Opto-electronics, Chinese Academy of Sciences, Associate Professor
(4) Dengfeng Dong, Academy of Opto-electronics, Chinese Academy of Sciences, Associate Professor
(5) Rongyi Ji, Academy of Opto-electronics, Chinese Academy of Sciences, Associate Professor
Contact information for submitting Author:
(1) Name: Zili Zhang
(2) Company: Academy of Opto-electronics, Chinese Academy of Sciences
(3) Full Address: No 9, Deng Zhuang South Road, Haidian District, Beijing, China
(4) Zip Code: 100094
(5) Phone Number: 86-10-82178675; 86-15101529774
(6) Email: zhangzili@aoe.ac.cn; bme_zzl@126.com
Content category:
(b) R&D (Research and Development) and/or New Technology
Details of the abstract (A technical paper will be submitted):
Laser Tracking Measurement System using Dual Femtosecond Optical Frequency Comb
Zili Zhang1,2, Weihu Zhou1,2,Dabao Lao1,2, Dengfeng Dong1,2, Rongyi Ji1
(1 Academy of Opto-electronics, Chinese Academy of Sciences, Beijing 100094, China)
(2 University of Chinese Academy of Sciences, Beijing 100049，China)
Abstract: Laser tracking measurement system is one of the most commonly used large-scale measurement systems in the fields of aircraft inspection, ship building, automobile assembly and other machinery manufacturing. It obtains an object’s spatial position using combination of distance measurement and angle measurement. Traditional laser trackers use interferometer or phase distance meter to realize distance measurement whereas each technology has its own strengths and weaknesses. Interferometer measures distances with high accuracy and frequency, but can only determine relative distances. Phase distance meter can realize absolute distance measurement whereas its measuring frequency is limited due to its measuring principle. In this paper a novel laser tracking measurement system was presented which realized absolute distance measurement using dual femtosecond optical frequency comb with high accuracy and high frequency. This paper firstly introduced the measuring principle and overall design of the system. Then the components of the instrument were analyzed including dual-comb distance measurement module, phase distance measurement module, precision angular encoder, tracking control module and system software. The test results showed that the distance measuring accuracy could reach 0.5ppm while angle measurement errors were compensated to less than 0.60″. The tracking control module based on DSP and FPGA can track a moving target with speed of 2m/s. Until now more research and experiments are expected to do to improve the performance and function of the system. In a word, laser tracking measurement system based on dual femtosecond optical frequency comb provides technical exploration for research and development of large-volume measurement systems.
Key words: large-scale measurement system; laser tracking measurement system; distance measurement; dual femtosecond optical frequency Comb; angle measurement
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