Femtosecond pulse laser distance and angle interferometer

Xu Liang; Jiarui Lin; Linghui Yang; Tengfei Wu; Yang Liu; Jigui Zhu

doi:10.1117/12.2543479

12 March 2020 Femtosecond pulse laser distance and angle interferometer

Xu Liang, Jiarui Lin, Linghui Yang, Tengfei Wu, Yang Liu, Jigui Zhu

Proceedings Volume 11439, 2019 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems; 114390V (2020) https://doi.org/10.1117/12.2543479
Event: 2019 International Conference on Optical Instruments and Technology, 2019, Beijing, China

Abstract

This paper describes a method of measuring distance and angle by dispersive interferometer using a femtosecond pulse laser. The measurement system is set up based on the modified Michelson interferometer, which combines the advantages of using retroreflector and plane-mirror reflector. The two parallel measured beams and one reference beam can undergo a mutual interference in frequency domain. The three shutters are set to two measure arms and reference arm, respectively. the shutters can be used to change the work mode of interference system. The optical path difference of distance and angle can be acquired by the modulated frequency of interference signal. Angle measurement has been compared to a calibrated rotation stage in the range of 1800 arcsec, the obtained mutual agreement is better than 3 arcsec in ordinary laboratory conditions. The results show the method has the potential for further research of absolute multiple degree-of-freedom measurements.

Citation Download Citation

Xu Liang, Jiarui Lin, Linghui Yang, Tengfei Wu, Yang Liu, and Jigui Zhu "Femtosecond pulse laser distance and angle interferometer", Proc. SPIE 11439, 2019 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems, 114390V (12 March 2020); https://doi.org/10.1117/12.2543479

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KEYWORDS

Distance measurement

Interferometers

Femtosecond phenomena

Pulsed laser operation

Retroreflectors

Beam splitters

Calibration

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