Optical design and analysis of laser radar spectrometer with high accuracy

Yang LIU; Xue-song ZHAO; Yan XIANG; Pan DENG; Li-hui LÜ

doi:10.3788/OPE.20182608.1904

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Optical design and analysis of laser radar spectrometer with high accuracy

Laser Spectroscopy | 更新时间：2020-08-13

- Optical design and analysis of laser radar spectrometer with high accuracy
- Optics and Precision Engineering Vol. 26, Issue 8, Pages: 1904-1909(2018)
- 作者机构：
  
  1.中国科学院安徽光学精密机械研究所, 安徽合肥 230031
  2.中国科学技术大学, 安徽合肥 230036
  3.电子工程学院脉冲功率激光技术国家重点实验室, 安徽合肥 230037
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20182608.1904
  CLC： TN959.6
- Received：04 April 2018，
  
  Accepted：25 April 2018，
  
  Published：25 August 2018
- 稿件说明：
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Yang LIU, Xue-song ZHAO, Yan XIANG, et al. Optical design and analysis of laser radar spectrometer with high accuracy[J]. Optics and precision engineering, 2018, 26(8): 1904-1909.
DOI：

Yang LIU, Xue-song ZHAO, Yan XIANG, et al. Optical design and analysis of laser radar spectrometer with high accuracy[J]. Optics and precision engineering, 2018, 26(8): 1904-1909. DOI： 10.3788/OPE.20182608.1904.

摘要

为了抑制边缘纯转动拉曼光谱成像偏差，提出了一种高精度测温拉曼激光雷达光谱仪光学系统设计。该系统利用非球面透镜组对光谱仪成像球差进行校正，针对光谱仪10 mm/nm的线分辨率要求，采用双光栅结构设计并对测温拉曼光谱仪各参数进行光线追迹，拟合得到双光栅的入射角、准直镜焦距和聚焦镜焦距的最优值。将拟合最优化结果代入Zemax软件进行优化分析，结果显示单个成像光谱成像宽度控制在0.771 5 mm，间隔0.1 nm的纯转动连续光谱成像中心间隔可以达到1 mm，满足了线阵探测器对成像质量的要求。通过计算在

=6级的纯转动拉曼后向散射信号对瑞利-米散射信号实现了10

抑制，达到了高精度纯转动拉曼激光雷达测温的目的，解决了目前双光栅光谱技术无法达到提取355 nm波段纯转动拉曼高光谱精度的要求，对测温拉曼激光雷达的技术发展有着深远的意义。

Abstract

This paper presents the optical system design for a high precision

temperature measuring

Raman lidar spectrometer. Using an aspheric lens group on an imaging spectrometer with spherical aberration correction

the results show that the pure rotational Raman spectrum imaging deviation can be effectively suppressed. The 10 mm/nm line resolution requirements for a high precision spectrometer

with a double grating structure design

and the temperature parameters of a Raman spectrometer for ray tracing

are fitted with a double grating incidence angle

and optimal values for the collimating and focusing lens focal lengths. The optimization results were substituted into the Zemax software for simulation analysis

and showed that a single spectral imaging width control in 0.771 5 mm

with 0.1 nm intervals of pure rotational continuous spectrum imaging center spacing

can reach 1 mm. By calculating the purely rotating Raman backscattering signal at

the Rayleigh-Mie scattering signal was suppressed by 10

satisfying the requirements of the linear array detector for image quality

and achieving the high precision of the pure rotational Raman lidar. This has solved the issue in which the double grating spectrum technique could not reach to extract the 355 nm band

which is the accuracy requirement of the high

pure

rotational

Raman spectrum. This indicates that the temperature measurement ability of the Raman lidar technology development is of far-reaching significance

and provides a more accurate basis for the analysis of urban heat island effect

and environmental pollution sources.

关键词

Keywords

references

MASAHARU I, HISAJI K, TADASHI K. Efficient ultraviolet rotational Raman lidar for temperature profiling of the planetary boundary layer[J]. Japanese Journal of Applied Physics, 2012, 51(4):052401.

DUKHYEON K, HYUNGKICH.Pure rotational Raman lidar for atmospheric temperature measurements[J].Journal of the Korean Physical Society, 2001, 39(5):838-841.

ANSMANN A, ARSHINOV Y, BOBROVNIKOV S, et al.. Double grating on ochromator for a pure rotational Raman lidar[J]. SPIE, 1998, 3583:49l-497.

NORTON E G, POVEY I M, SOUTH A M. Broadband CCD detection system for rotational Raman lidar studies of the troposphere[J]. SPIE, 4153:657-662.

王宏伟, 华灯鑫, 王玉峰, 等.水汽探测拉曼激光雷达的新型光谱分光系统设计与分析[J].物理学报, 2013, 62(12):143-148.

WANG H W, HUA D X, WANG Y F, et al.. The design and analysis of the new spectral spectroscopic system for the water vapor detection Raman lidar[J]. Acta Physica Sinica, 2013, 62(12):143-148.(in Chinese)

刘玉丽, 张寅超, 苏嘉, 等.探测低空大气温度分布的转动拉曼激光雷达[J].光电工程, 2006, 33(10):43-48.

LIU Y L, ZHANG Y CH, SU J, et al.. A rotating Raman laser radar is used to detect the distribution of low-altitude atmospheric temperature[J]. Opto-Electronic Engineering, 2006, 33(10):43-48.(in Chinese)

WANG S L, SU J, ZHAO P T, et al.. A pure rotational Raman lidar based on three-stage Fabry-Perot etalons for monitoring atmospheric temperature[J].Acta Physica Sinica, 2008, 57(6):3941-3947.

RISTORI P, FROIDEVAUX M, DINOEV T, et al.. Development of a temperature and water vapor Raman lidar for turbulent observations[J]. SPIE, 2005, 5984:1-8.

KIM D, PARK S, CHA H, et al.. New multi-quantum number rotational Raman lidar for obtaining temperature and aerosol extinction and backscattering scattering coefficients[J]. Applied Physics B, 2005, 82(1):1-4.

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