李延伟, 杨洪波, 程志峰, 丁亚林, 张洪文, 张景国. 航空遥感器光学窗口光机热一体化设计[J]. 红外与激光工程, 2012, 41(8): 2102-2106.
引用本文: 李延伟, 杨洪波, 程志峰, 丁亚林, 张洪文, 张景国. 航空遥感器光学窗口光机热一体化设计[J]. 红外与激光工程, 2012, 41(8): 2102-2106.
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Li Yanwei, Yang Hongbo, Cheng Zhifeng, Ding Yalin, Zhang Hongwen, Zhang Jingguo. Thermal/structural/optical integrated design for optical window in aerial remote sensor[J]. Infrared and Laser Engineering, 2012, 41(8): 2102-2106.
Citation: Li Yanwei, Yang Hongbo, Cheng Zhifeng, Ding Yalin, Zhang Hongwen, Zhang Jingguo. Thermal/structural/optical integrated design for optical window in aerial remote sensor[J]. Infrared and Laser Engineering, 2012, 41(8): 2102-2106.
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航空遥感器光学窗口光机热一体化设计

Thermal/structural/optical integrated design for optical window in aerial remote sensor

    摘要
  • 摘要: 为减小光学窗口对航空光学遥感器成像质量的影响，对光学窗口的窗口玻璃厚度进行了优 化设计。根据强度理论确定了窗口玻璃最小厚度。依据纵掠平壁理论计算出光学窗口外表面的平均对 流换热系数；以热光学为基础，仿真了航摄时光学窗口的瞬态温度场分布；计算了光学窗口在热-力 耦合作用下不同窗口玻璃厚度时的波像差(PV 和RMS)，最终确定了矩形光学窗口(290 mm 140 mm) 的玻璃厚度为17 mm。试验结果表明：特征频率为60 lp/mm 时光学系统传递函数为0.304，并获得了 稳定、清晰的航摄图像。成功实现了光学窗口的光机热一体化设计，可为其他航空光学窗口设计提供 参考。

     

    Abstract: Inordertoreducetheinfluenceofopticalwindowonimagingqualityinaerialremotesensor,theopticalwindowwasoptimizedinglassthickness.Theminimumthicknessofopticalwindowglasswascalculatedwithstrengththeory.Theconvectionheattransfercoefficientonoutersurfaceofopticalwindowglasswascalculatedwiththetheoryoflongitudinallysweepingplanmural.Basedonthethermalopticalanalysis,transientstatetemperaturefieldwasemulated,andtheopticalpathinpeaktovalleyvalue(PV)androotmeansquare(RMS)errorwerecalculatedunderthethermal-forcecouplingcondition. Thicknessoftheopticalwindow(290mm140mm)wasdeterminedas17mm.TheresultofpracticalapplicationshowsthattheMTFis0.304whenthecharacteristicsfrequencyis60lp/mmandthestableanddistinctimageisobtained.Thestudyresultshowsthatthermal/structural/opticalintegrateddesignforopticalwindowisachievedsuccessfully,anditprovidesareferencefortheopticalwindowdesign.

     

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