ABSOLUTE DISTANCE MEASUREMENT IN AIR USING DUAL FEMTOSECOND LASERS |
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| Guanhao Wu, Luofeng Shen, Kai Ni, Weihu Zhou, Qian Zhou |
- Abstract:
- A dual-comb-based distance measurement method is proposed, which can measure the optical distance of the fundamental and the second harmonics simultaneously, so that two-color method can be applied to correct the refractive index of air. In a 1.6 m long distance measurement, the stability is about 10 µm. In the step-by-step linear test with a range of 1.2 m, the measurement accuracy is demonstrated to be about 20 µm. The results show the present method can be applied in practical distance measurement.
- Keywords:
- dual frequency comb, distance measurement, the refractive index of air
- Download:
- IMEKO-TC14-2014-22.pdf
- DOI:
- -
- Event details
- IMEKO TC:
- TC14
- Event name:
- TC14 LMPMI Symposium 2014
- Title:
11th Symposium on Laser Metrology for Precision Measurement and Inspection in Industry
- Place:
- Tsukuba, JAPAN
- Time:
- 03 September 2014 - 05 September 2014