| 论文标题 |
Wind velocity measurement with wide angle divided mirror Michelson wind imaging interferometer |
| 作者 |
Shaojun Lu, William E. Ward, Jeffery A. Lagille, Samuel Kaare ,chunmin zhang |
| 发表/完成日期 |
2017-04-09 |
| 期刊名称 |
OPTOELECTRONICS AND ADVANCED MATERIALS – RAPID COMMUNICATIONS |
| 期卷 |
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| 相关文章 |
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| 论文简介 |
Detection of atmospheric winds is needed in many fields in order to monitor the thermosphere and upper mesosphere. The Michelson Interferometer is a kind of instrument to measure wind velocity by detecting the Doppler shift of airglow emission lines. With the aim to get the Doppler shift needed to calculate the wind velocity, researchers developed the four-phase-step and divided mirror technologies respectively. A wide angle Michelson Interferometer that combines the divided mirror and phase stepping equipment is proposed in this paper. Equal thickness fringes are detected to realize an excellent parallelism of two mirrors of the Michelson Interferometer with a reiterate algorithm. The wind was simulated in laboratory with visible laser beam and rotating wheel, and the phase shift for different wind velocities was obtained by recording the equal inclination fringes. Using the four-intensity algorithm, the wind velocity was obtained. Compared to the traditional systems wherein the four-intensity algorithm is used to detect wind velocity, the proposed system has the advantage of easily getting the phase interval of 90 degrees. The feasibility of the proposed method was proven by experiments in the visible channel. |
(创新港)
