室温及中低温度下K9玻璃镜片的微小形变研究  

Study on Micro-Deformation of K9 Glass at Room, Low and Medium Temperature

作　　者：焦天乙 陈秀艳[1] 高朋[1] 

机构地区：[1]沈阳师范大学物理科学与技术学院,辽宁沈阳

出　　处：《应用物理》2019年第3期133-139,共7页Applied Physics

基　　金：沈阳师范大学优秀人才支持计划项目(No.222-51300417);辽宁省自然科学基金项目(No.20180550055);国家自然基金青年基金项目(No.61603265)。

摘　　要：K9玻璃是现代光学系统中重要而常用的元件之一,为了研究其室温及中低温环境下微小形变对光学系统成像的影响,构建了直径为40 mm,厚度为2 mm的几何模型,利用ANSYS有限元分析法分别对环境温度一定、热载荷温度变化和热载荷温度一定、环境温度变化两种情况下K9玻璃微小形变与热应变进行模拟分析。在环境温度为18℃时,热载荷每升高1℃,K9玻璃热形变约增加170 nm,当热载荷温度为35℃,环境温度平均每变化10℃时,玻璃热形变量约为1170 nm。进一步将此模拟结果与激光散斑干涉仪相结合,模拟分析了热形变在0.1 μm、0.25 μm、0.35 μm时,干涉光路成像的变化,得出了K9玻璃室温及常温下微小形变对光学系统成像具有重要影响的结论,同时也为镜片微小位移提供了激光散斑干涉测量的方法。该研究对温差较大地区光学成像系统成像以及热源对光学系统室温和中低温环境成像提供了参考依据,同时也为后续相关光学元件微形变研究提供了研究基础。K9 glass is one of the most importantand commonly used components in modern optical systems.In order to study theeffect of micro deformation on optical system imaging at room,medium and lowtemperature,a geometric model with diameter of 40 mm and thickness of 2 mm wasconstructed.The ANSYS finite element analysis method was used to simulate themicro deformation and thermal strain of K9 glass under two conditions,one was keepingthe ambit temperature constant,meanwhile changing the temperature of thethermal load,the other was that keeping the temperature of the thermal load constant,meanwhile changing the ambit temperature.When the ambit temperature was 18?C,the thermal deformation of K9 glass increasedabout 170 nm at every 1?C increase of the thermal load.When thethermal load temperature was fixed at 35?C,the thermal deformation of glass increasedabout 1170 nm as the environmental temperature increasing every 10?C.In addition,the simulation results arecombined with laser speckle interference,and the changes of optical pathimaging were simulated and analyzed when the thermal deformation was 0.1μm,0.25μm and 0.35μm.It was concluded that the micro deformation of K9 glass atroom,low and medium temperature had an important influence on the imaging ofoptical system,and the micro displacement of the lens provides a method oflaser speckle interference.The research provided a reference for the of opticalsystem imaging at a region with greater temperature difference and the imagingof the optical system at room temperature and medium low temperature by heatsource,and also provided a basis for the study of the subsequent related opticalelements.

关 键 词：K9玻璃 ANSYS有限元分析 微小形变 热应变 激光散斑干涉 

分 类 号：TN2[电子电信—物理电子学]