A method for long absolute distance measurement based on high stability and synchronous multi-frequency

摘要：

　　In order to improve the measurement accuracy and the real-time performance in long absolute distance measurement,a method based on high stability and synchronization multi-frequency is proposed.Multi-frequency is generated by shifting one mode laser frequency with three acousto-optic frequency shifters,and couple in one beam by fiber.Heterodyne frequencies between different multi-frequency is separated by its different polarization and frequency bandwidth,and acted as the coarse and precision measuring frequency.Therefore synchronous occurrence of measuring multi-frequency is achieved,which improve the real-time performance of measurement.Results of the experiment show that the measuring frequency stability is better than 3.6×10-8,and the laser range finder have an uncertain measuring result of less than 60 μm at a distance of 20 m under laboratory conditions.

关键词： absolute distance measurement synchronous multi-frequency frequency stability phase measurement

作者: Yang Hongxing Fan Zhigang MA Yu-Wei

作者单位: aPostdoctoral Research Station of Optical Engineering, Harbin Institute of Technology, Harbin150001, aPostdoctoral Research Station of Optical Engineering, Harbin Institute of Technology, Harbin150001, Institute of Ultra-precision Optoelectronic Instrument Engineering, Harbin Institute of Technology,H

会议类型: 国际会议

会议名称: 2012第八届精密工程测量和仪器仪表国际研讨会(ISPEMI2012)

会议地点: 成都

会议语种:英文

页码: 1-8

在线出版日期: 2012-08-08（万方平台首次上网日期，不代表论文的发表时间）