基于双路多光束干涉的光程微变动实时监测技术

doi:10.3969/j.issn.1000-1158.2018.z1.03

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Abstract A micro-optical path measurement system based on the principle of multi-beam interference using two channels is introduced. The system that can measure the micro-change of optical path caused by the change of air refractive index has high measurement sensitivity. And the measurement sensitivity can be verified by a simple experiment, which uses the acoustic wave to change the refractive index of the air and further change the optical path length. The experimental results of the system are compared with those of the Michelson interference method. It is concluded that this system can achieve high measurement sensitivity with small interference arm, while the Michelson interference system are in the case of the large interference arm. The measurement of the optical path variation can be applied in many fields, and the experimental system has the characteristics of miniaturization, which can provide the technical basis for the application in the related fields.

Key words： metrology multi-beam interference optical path micro-change;laser wavelength;air refractive index

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TB92

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	Articles by authors
	HUANG Wei
	GAO Hong-tang
	ZHANG Fu-min
	WEI Bing-ying

Cite this article:

HUANG Wei,GAO Hong-tang,ZHANG Fu-min, et al. Real-time Monitoring Techniques of Optical Path Micro-change Based on Two-channel Multi-beam Interference[J]. Acta Metrologica Sinica, 2018, 39(6A): 11-.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2018.z1.03 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2018/V39/I6A/11