Laser feedback confocal tomographic system based on microchip Nd:YVO4 lasers

TIAN Zhen-guo; ZHANG Li; ZHU Kai-yi

doi:10.3788/OPE.20152313.0029

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Laser feedback confocal tomographic system based on microchip Nd:YVO₄ lasers

更新时间：2020-08-13

- Laser feedback confocal tomographic system based on microchip Nd:YVO₄ lasers
- Optics and Precision Engineering Vol. 23, Issue 10z, Pages: 29-34(2015)
- 作者机构：
  
  1. 清华大学精密测试技术及仪器国家重点实验室北京,100084
  2. 北京林业大学理学院北京,100083
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20152313.0029
  CLC： TN248.1
- Received：12 June 2015，
  
  Revised：30 June 2015，
  
  Published：14 November 2015
- 稿件说明：
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田振国, 张立, 朱开毅. 基于微片Nd:YVO4激光回馈的共焦层析成像系统[J]. 光学精密工程, 2015,23(10z): 29-34

TIAN Zhen-guo, ZHANG Li, ZHU Kai-yi. Laser feedback confocal tomographic system based on microchip Nd:YVO4 lasers[J]. Editorial Office of Optics and Precision Engineering, 2015,23(10z): 29-34
田振国, 张立, 朱开毅. 基于微片Nd:YVO4激光回馈的共焦层析成像系统[J]. 光学精密工程, 2015,23(10z): 29-34 DOI： 10.3788/OPE.20152313.0029.

TIAN Zhen-guo, ZHANG Li, ZHU Kai-yi. Laser feedback confocal tomographic system based on microchip Nd:YVO4 lasers[J]. Editorial Office of Optics and Precision Engineering, 2015,23(10z): 29-34 DOI： 10.3788/OPE.20152313.0029.

摘要

基于微片激光移頻回馈的基本原理

结合共焦技术

设计了激光回馈共焦层析成像系统。该系统以Nd:YVO

微片激光器为光源

输出单纵模线偏振激光

工作波长为1 064 nm

对移频回馈信号放大能力高达10

量级

能够在保证分辨率的前提下对样品进行更大深度的成像。结合扫描和图像处理技术该系统可以对样本进行三维成像

测试实验系统的纵向分辨率为15 μm左右

横向分辨率达1 μm。对泡沫进行了二维成像并对洋葱内异物进行了定位实验

得到了测试样本的内部信息图像。实验结果表明该系统具有良好的层析性能

对生物样本内异物也有很好的定位能力。

Abstract

Based on the theory of frequency-shifted laser feedback and confocal technology

a laser feedback confocal tomographic system is designed. The light source in the system is a single longitudinal

linearly polarized Nd:YVO

microchip laser worked at the wavelength of 1 064 nm. It can magnify the frequency-shifted feedback signal by a factor of 106 and can realize optical tomography with a greater depth on the premise of high resolution. With the technology of scanning and image processing

the system can fulfill the three-direction imaging of a sample. The system has a lateral resolution of ~1 μm and a vertical resolution of ~15 μm. A two-dimensional imaging experiment for polyfoam and a foreign matter detection for inside onion are performed and the inner information images of the samples are obtained. The results show that the system designed has well tomographic ability and also good location ability for the foreign matter inside biological samples.

关键词

Keywords

references

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邱丽荣, 李佳, 赵维谦, 等. 激光共焦透镜曲率半径测量系统[J]. 光学精密工程, 2013, 21(2): 246-252. QIU L R, LI J, ZHAO W Q, et al..Laser confocal measurement system for curvature radii of lenses[J]. Opt.Precision Eng., 2013, 21(2): 246-252. (in Chinese)

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