复合式多点测量速度干涉仪光学系统设计

闫亚东; 何俊华; 许瑞华; 韦明智; 李奇

doi:10.3788/OPE.20172508.2023

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复合式多点测量速度干涉仪光学系统设计

现代应用光学 | 更新时间：2020-07-07

- 复合式多点测量速度干涉仪光学系统设计
- Optical system design of compound multi-point measurement velocity interferometer
- 光学精密工程 2017年25卷第8期页码：2023-2028
- 作者机构：
  
  中国科学院西安光学精密机械研究所, 西安 710119
- 作者简介：
  
  闫亚东(1979-), 男, 河南周口人, 博士, 副研究员, 主要从事强激光精密诊断与应用技术的研究。E-mail:yyd@opt.ac.cn YAN Ya-dong, E-mail:yyd@opt.ac.cn
  [ "何俊华(1968-), 男, 江西人, 研究员, 博士生导师, 主要从事水下光电成像与探测技术、强激光精密诊断与应用技术的研究。E-mail:hjh@opt.ac.cn" ]
- 基金信息：
  
  国家教育部博士点（西部）基金资助项目(200929441213)
- DOI：10.3788/OPE.20172508.2023
  中图分类号： TH744.3;TH824
- 收稿日期：2016-12-27，
  
  录用日期：2017-2-4，
  
  纸质出版日期：2017-08-25
- 稿件说明：
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闫亚东, 何俊华, 许瑞华, 等. 复合式多点测量速度干涉仪光学系统设计[J]. 光学精密工程, 2017,25(8):2023-2028.

Ya-dong YAN, Jun-hua HE, Rui-hua XU, et al. Optical system design of compound multi-point measurement velocity interferometer[J]. Optics and precision engineering, 2017, 25(8): 2023-2028.
闫亚东, 何俊华, 许瑞华, 等. 复合式多点测量速度干涉仪光学系统设计[J]. 光学精密工程, 2017,25(8):2023-2028. DOI： 10.3788/OPE.20172508.2023.

Ya-dong YAN, Jun-hua HE, Rui-hua XU, et al. Optical system design of compound multi-point measurement velocity interferometer[J]. Optics and precision engineering, 2017, 25(8): 2023-2028. DOI： 10.3788/OPE.20172508.2023.

摘要

为满足爆炸冲击作用下物质界面的速度测量需求，设计了一种复合式多点测量的速度干涉仪。采用物方和像方双远心光路，将光纤阵列出射的照明激光定点投射到待测物面上，实现了针状滴注式照明，充分利用了照明激光能量，且保证了待测物面在运动过程中具有恒定的照度。成像系统像面采用末端为大芯径的锥形光纤接收信号光，既保证了物面运动过程中信号光与光纤的有效耦合，又保证了信号的单模输出，以便进入单模光纤马赫-曾德干涉仪进行差频干涉。采用具有微小楔角、沿直径方向镀矩形带状45°反射膜的反射镜，将照明光路与成像光路同轴，并校正了成像系统的大量像散。该干涉测量系统在物面运动10 mm的行程中，物面滴注式照明照度保持恒定，像面光斑大小没有超出大芯径的光纤芯径。此光学系统能够满足爆炸冲击界面的大行程速度测量需求。

Abstract

In order to measure velocities of explosion loading surface driven by blast waves

a compound velocity interferometer was introduced. The illumination laser from fiber array was projected onto the target surface through a telecentric optical imaging system. Only several points on the target were illuminated

which got the utmost out of laser power. The illumination beam had so small numerical aperture that the illumination spot size kept constant while the target moving within 10 mm. A taper fiber array with large core diameter was mounted on the image surface of optical imaging system

thus the signals could coupled into the large core fibers effectively and could output in single mode for difference interference in single mode Mach-Zender interferometer during the target movement. A 45° beam splitter with a small wedge angle was employed before the first optical element of the imaging system

the illumination laser could be reflected to the object surface by the rectangular films on the first surface of the splitter. The small wedge angle of the splitter could compensate the astigmatism lead by titled parallel plate. During the object surface moving within 10 mm

the lighting power and spot sizes on object surface remain the same

and the coupling efficiency of Doppler frequency shift signals also remain constant. This optical system could meet the demand of explosion loading surface velocity measurement in long distance range.

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Keywords

references

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