發(fā)布時間：2018-03-24 21:20

  本文選題：譜線漂移　切入點：遙感　出處：《紅外與激光工程》2015年05期

【摘要】：為了研究溫度對機載成像光譜儀光學性能的影響,分析了機載環(huán)境下儀器溫度載荷的特點,闡述了溫度載荷的作用機理和表現(xiàn)形式,研究了光譜儀的熱光學性能。首先,分析了機載環(huán)境下溫度載荷特點;其次,以最小二乘法和坐標轉換法為理論依據(jù),編制了面形誤差及剛體位移求解程序,并結合有限元法計算了光機系統(tǒng)在溫度載荷作用下各鏡面的變形值和剛體位移大小;最后,對變形后的光學系統(tǒng)進行了光線追跡,求解了鏡面剛體位移導致的譜線位置變化,研究其譜線漂移特性,并計算了剛體位移對傳遞函數(shù)(MTF)的影響。計算結果表明,±10℃溫度變化范圍內,譜線漂移量小于光譜定標精度要求的1/3,不需要再進行光譜定標和光譜修正;系統(tǒng)傳遞函數(shù)也能夠滿足成像質量要求。這些結論會對儀器研制有很大的工程實用價值。
[Abstract]:In order to study the effect of temperature on the optical performance of airborne imaging spectrometer, the characteristics of temperature load of airborne imaging spectrometer are analyzed, the action mechanism and form of temperature load are expounded, and the thermal optical properties of spectrometer are studied. The characteristics of temperature load in airborne environment are analyzed. Secondly, based on the least square method and coordinate transformation method, a program for calculating surface error and rigid body displacement is developed. Combined with finite element method, the deformation value of each mirror and the displacement of rigid body are calculated under the action of temperature load. Finally, the ray tracing of the deformed optical system is carried out, and the spectral line position change caused by the displacement of the rigid body of the mirror is solved. The characteristics of spectral line drift are studied, and the effect of rigid body displacement on transfer function MTF is calculated. The results show that in the range of 鹵10 鈩，

本文編號：1660073