557.7nm波段星载探测风场的多普勒非对称差分干涉仪杂散光分析与抑制OA北大核心
Analysis and suppression of stray light in Doppler asymmetric spatial heterodyne interferometer for spaceborne wind field detection at 557.7 nm band
由于大气背景辐射对多普勒非对称差分(DASH)干涉仪风场探测成像质量会产生影响,本文对其进行研究并设计杂散光抑制结构.基于轨道参数和观测几何,分析不同高度下大气背景辐射对系统信噪比(SNR)影响.随后,结合系统参数和信噪比变化规律设计遮光罩,并通过点源透过率(PST)评估抑制效果.结果表明,随着高度降低,大气背景辐射逐渐增强,从而导致信噪比逐渐下降.从PST曲线可知,系统视场内PST保持稳定,遮光罩未影响对目标光线的探测;视场外PST随离轴角增加而降低,在杂散光抑制角1.07°附近降至10-8以下,该设计满足系统对大气背景辐射的抑制要求.
The impact of atmospheric background radiation on imaging quality in wind field detection by the Doppler Asymmetric Spatial Heterodyne(DASH)interferometers is investigated,and a stray light suppres-sion structure is designed.Utilizing orbital parameters and observation geometry,the influence of atmospher-ic background radiation on the signal-to-noise ratio(SNR)at varying altitudes is analyzed.Subsequently,a baffle is designed by considering system parameters and SNR variation patterns,with its suppression effic-acy evaluated via point source transmittance(PST).The results demonstrate that atmospheric background ra-diation intensifies with decreasing altitude,leading to progressive SNR degradation.PST curves indicate that in-field PST is stable and unaffected by the baffle,preserving target light detection capability.Out-of-field PST decreases with increasing off-axis angle,dropping below 10-8 near the critical stray light suppression angle of 1.07°.The proposed suppression design fulfills system requirements for atmospheric background ra-diation mitigation.
刘子维;江伦;贺欣桐;王若晴
长春理工大学光电工程学院,吉林长春 130022长春理工大学光电工程学院,吉林长春 130022||长春理工大学空间光电技术研究所,吉林长春 130022长春理工大学光电工程学院,吉林长春 130022||长春理工大学空间光电技术研究所,吉林长春 130022长春理工大学光电工程学院,吉林长春 130022||长春理工大学空间光电技术研究所,吉林长春 130022
机械制造
大气背景辐射杂散光信噪比遮光罩点源透过率
atmospheric background radiationstray lightsignal-to-noise ratiobafflepoint source transmit-tance
《中国光学（中英文）》 2025 (5)
1066-1075,10
吉林省科技发展计划项目(No.20230201006GX)Supported by Science and Technology Development Plan Project of Jilin Province(No.20230201006GX)
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