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刘欢; 江伦; 张晓菲; 付芸; 宋延嵩; 佟首峰; 刘显著

doi:10.37188/CO.EN-2022-0018

365彩票官网老虎机

刘欢 ^1,,
江伦 ^{1, 2, 3,,},
张晓菲 ¹,
付芸 ¹,
宋延嵩 ^{1, 2, 3},
佟首峰 ^{1, 2, 3},
刘显著 ^{1, 2, 3}

1.
长春理工大学光电工程学院, 吉林长春 130022
2.
深圳鹏城实验室, 广东深圳518000
3.
长春理工大学航空与地面激光通信技术国防基础科学重点实验室, 吉林长春 130022

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- 收稿日期: 2022-11-13
- 修回日期: 2022-12-08
- 网络出版日期: 2023-03-15

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doi: 10.37188/CO.EN-2022-0018

LIU Huan ^{1
,},
JIANG Lun ^{1, 2, 3
,,},
ZHANG Xiao-fei ¹,
FU Yun ¹,
SONG Yan-song ^{1, 2, 3},
TONG Shou-feng ^{1, 2, 3},
LIU Xian-zhu ^{1, 2, 3}

1.
School of Opto-Electronic Engineering, Changchun University of Science and Technology, Changchun 130022, China
2.
Peng Cheng Laboratory, Shenzhen 518000, China
3.
Key Laboratory of Fundamental Science for National Defense of Aero and Ground Laser Communication Technology, Changchun University of Science and Technology, Changchun 130022, China

Funds:Supported by National Key Research and Development Plan Project (No. 2022YFB3902500)

More Information

Author Bio:
Liu Huan (1997—), female, born in Jilin, Jilin Province master candidate, In June 2023, she received her master's degree in engineering from Changchun University of Science and Technology, She mainly engaged in Doppler asymmetric spatial heterodynetechnology, optical engineering research. E-mail: [email protected]

Jiang Lun (1984—), male, Changchun, Jilin Province, Doctoral, associate professor and doctoral supervisor, In 2012, he received his PhD from Changchun Institute of Optics, Fine Mechanicsand Physics, Chinese Academy of Sciences, mainly engaged in optical system design, space optics and space optical communication technology. E-mail: [email protected]

Corresponding author: [email protected]

摘要

摘要:
为探测中层大气风场信息，研制了一台具有热补偿特性的大集光率（AΩ）、高信噪比（Signal-to-Noise Ratio, SNR）的地基多普勒非对称空间外差（Doppler Asymmetric Spatial Heterodyne, DASH）干涉仪。针对557.7 nm的氧原子气辉谱线，制定了DASH干涉仪的详细参数和指标。系统采用扩视场和消热差设计，半视场角达到2.815°，集光率为0.09525 cm²sr，系统信噪比在113.75左右，经过热补偿设计后，最终光程差随温度变化(dΔd ₀/dT)的数值仅为2.224×10⁻⁷ mm/°C。根据相应参数设计优化了光学系统，前置光学系统和探测器光学系统分别采用像方远心和双远心结构，各项指标均满足探测要求。为验证设计结果，搭建了地基DASH干涉仪实验平台，进行室内以及地基室外实验，最终得到了明显的干涉条纹。上述结果证明DASH干涉仪的系统设计是合理的，系统的信噪比和集光率满足检测要求。
- 地基DASH干涉仪 /
- 557.7 nm氧原子气辉谱线 /
- 光学设计 /
- 信噪比
Abstract:
A ground-based Doppler Asymmetric Spatial Heterodyne (DASH) interferometer with a high Signal-to-Noise Ratio (SNR) and large etendue (AΩ) with thermal compensation was developed to detect wind field information in the middle atmosphere. The detailed parameters and index of the DASH interferometer were developed for the 557.7 nm oxygen airglow spectral line. The system was designed with an expanded Field Of View (FOV) and thermal compensation. The half-FOV angle reached 2.815°, the etendue was 0.09525 cm²sr, and the system’s SNR was approximately 113.75. Through the thermal compensation design, the final optical path difference with temperature variation (dΔd ₀/dT) was only 2.224×10⁻⁷mm/°C. The optical system was designed and optimized according to the corresponding parameters. Image-side telecentric and bilateral telecentric optical system structures were used in the entrance optics and exit optics, respectively, and parameters such as telecentricity and distortion met the detection requirements. To verify the design results, a ground-based DASH interferometer experimental platform was constructed, and indoor and outdoor ground-based experiments were conducted. In the final experiment, clear interference fringes were obtained, which proves that the system design results of the DASH interferometer are reasonable, and the system’s SNR and etendue meet the detection requirements.
- ground-based DASH interferometer /
- 557.7 nm oxygen atom airglow spectral line /
- optical design /
- signal-to-noise ratio

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Figure 1. Diagram of the DASH interferometer structure

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Figure 2. Curves of the modulation and phase difference varying with optical path difference of the 557.7 nm spectral line at 90–110 km

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Figure 3. Curves of the modulation and phase difference varying with optical path difference of the 557.7 nm spectral line at 150–300 km

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Figure 4. Plot of the optical path difference versus the interferogram intensity difference

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Figure 5. Optical path diagram of the interference module

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Figure 6. (a) Relationship between signal to noise ratio and pixel position; (b) graph of variation of wind speed error with SNR

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Figure 7. The MTF curves of the entrance optics

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Figure 8. (a) MTF of the exit optics and (b) dot chart of the exit optics

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Figure 9. (a) Two-dimensional system diagram; (b) three-dimensional system diagram

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Figure 10. Real image of the interferometer

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Figure 11. Real image of the narrow band filter

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Figure 12. (a) Schematic diagram of the laboratory debugging device; (b) photograph of the laboratory debugging device

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Figure 13. Streaks made by krypton lamps in the laboratory

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Figure 14. Integrated ground-based DASH interferometer

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Figure 15. Photograph of the ground experiment setup

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Figure 16. Night airglow interferogram

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Figure 17. Interferogram of krypton lamp on September 27

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Figure 18. Interferogram of night airglow on September 27

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Figure 19. Schematic diagram of wind speed simulation

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Figure 20. The corresponding interferogram is 1810, 2021 and 2203 r/min, respectively

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Table 3. Basic parameters of DASH interferometer

Parameter		System indicators
Littrow wavelength		557.7 nm
Half of view angle		2.815°
Diameter of the pupil		40 mm
Field of view extension prism	Materials	H-LAK2A
Field of view extension prism	Angulus parietalis	8.7424°
Wedged spacers	Materials	Fused silica (spacers1); H-FK61 (spacers 2)
Wedged spacers	Thickness	Fused silica (spacers1); H-FK61 (spacers 2)
Beam splitter	Splitting ratio	1∶1
	Asymmetrical	20.363 mm
	Materials	H-K9LAGT
Gratings	Grating Littrow angle	9.631°
	Grating diffraction order	1
	Grating effective width	13.69 mm
	Materials	Fused silica
	Lines	600 gr/mm

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Table 1. DASH system parameter list

System Parameter	Value
Transmittance of an optical system: τ _tot(σ).	0.07
Detector quantum efficiency: η(σ)	0.9
Optical system: F #	3.862
Detector pixel size: d	13 μm
Dark current η _dark (refrigeration temperature d∆d ₀/dT：−80 °C)	0.00025
Readout noise: σ _read	1e^-/p·s^-1

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Table 2. Design indices of the dual telecentric optical system

Parameter	System indicators
Wavelength	557.7 nm
Magnification	−0.9715
F#	9
Distortion	2.4×10⁻⁵
Back focal length	30 mm
Telecentricity	<7.0×10⁻³

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Table 4. DASH system specifications

Parameter		System indicators
Resolving power		16402.941
measuring range		90-110 km (Height of airglow)
Resolution of measurement		1.0933 cm⁻¹ (0.034 nm)
$\dfrac{ {{\rm{d}}\Delta { d_0} } }{ { {\rm{d} }T} }$		2.224×10⁻⁷ mm/°C
Etendue (AΩ)		0.09525 cm²sr
SNR		113.75
Decomposition of precision	Temperature	0.05 rad/°C
	SNR	SNR>60，wind speed error <10⁻⁴ m/s
	Inversion accuracy (Nuttall window function, FWHM=10)	0.00064 m/s

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