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

【摘要】：為了研究溫度對(duì)機(jī)載成像光譜儀光學(xué)性能的影響,分析了機(jī)載環(huán)境下儀器溫度載荷的特點(diǎn),闡述了溫度載荷的作用機(jī)理和表現(xiàn)形式,研究了光譜儀的熱光學(xué)性能。首先,分析了機(jī)載環(huán)境下溫度載荷特點(diǎn);其次,以最小二乘法和坐標(biāo)轉(zhuǎn)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(jié)合有限元法計(jì)算了光機(jī)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(duì)變形后的光學(xué)系統(tǒng)進(jìn)行了光線追跡,求解了鏡面剛體位移導(dǎo)致的譜線位置變化,研究其譜線漂移特性,并計(jì)算了剛體位移對(duì)傳遞函數(shù)(MTF)的影響。計(jì)算結(jié)果表明,±10℃溫度變化范圍內(nèi),譜線漂移量小于光譜定標(biāo)精度要求的1/3,不需要再進(jìn)行光譜定標(biāo)和光譜修正;系統(tǒng)傳遞函數(shù)也能夠滿足成像質(zhì)量要求。這些結(jié)論會(huì)對(duì)儀器研制有很大的工程實(shí)用價(jià)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(hào)：1660073