【摘要】：星載多模式差分吸收高光譜成像儀是一種新型空間大氣探測儀器,要求同時具有天底、臨邊和掩日等多模式探測功能,主要用于二氧化硫、二氧化氮等大氣痕量氣體探測。提出了利用兩個掃描鏡切換不同探測模式、利用雙光譜儀減小系統(tǒng)的光譜雜光,利用分色片將工作波段分成3個通道實現(xiàn)多模式高光譜分辨率探測的新方法,設計了一個多模式差分吸收高光譜成像儀光學系統(tǒng),瞬時視場為1.8°×0.04°,系統(tǒng)F數(shù)為2,工作波段為250~500nm,分成250~310nm、300~410nm和400~500nm 3個通道。利用ZEMAX-EE軟件進行優(yōu)化設計和分析,其中250~310nm通道,光譜分辨率為0.12nm,滿足光譜分辨率不大于0.4nm的指標要求;300~410nm和400~500nm通道,光譜分辨率分別為0.25nm和0.23nm,滿足光譜分辨率不大于0.6nm的指標要求。多模式差分吸收高光譜成像儀在空間維方向的調(diào)制傳遞函數(shù)(MTF)在特征頻率0.25lp/mm處達到0.98以上,能夠滿足空間多模式差分吸收高光譜大氣探測的要求。
[Abstract]:Spaceborne multimode differential absorption hyperspectral imager is a new type of space atmosphere detector, which requires multi-mode detection functions such as sky bottom, edge detection and sun-mask. It is mainly used to detect trace gases in the atmosphere, such as sulfur dioxide, nitrogen dioxide and so on. A new method of multi-mode hyperspectral resolution detection is proposed in which two scanning mirrors are used to switch different detection modes, two spectrometers are used to reduce the spectral clutter of the system, and the working bands are divided into three channels by using color separators. An optical system of multimode differential absorption hyperspectral imager is designed. The instantaneous field of view is 1.8 擄脳 0.04 擄, the system F number is 2, and the working band is 250 ~ (500) nm, which is divided into three channels: 250 ~ 310nm ~ 300nm ~ 410nm and 400~500nm. The optimum design and analysis are carried out by using ZEMAX-EE software. The spectral resolution of 250~310nm channel is 0.12 nm, which satisfies the requirement of 300 nm 410nm and 400~500nm channel when the spectral resolution is not greater than 0.4nm. The spectral resolution is 0.25nm and 0.23 nm, respectively, which meets the requirement of spectral resolution less than 0.6nm. The modulation transfer function (MTF) of the multimode differential absorption hyperspectral imager in the spatial dimension direction is above 0.98 at the characteristic frequency 0.25lp/mm, which can meet the requirements of the spatial multi-mode differential absorption hyperspectral atmospheric detection.
【作者單位】： 中國科學院長春光學精密機械與物理研究所;
【基金】：國家自然科學基金(41575023;41105014) 中科院長春光機所領域前沿創(chuàng)新項目
【分類號】：TH744.1

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1 李艷紅;長光程差分吸收光譜儀簡介[J];分析儀器;1999年01期

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本文編號：2257121