光学窗口形变对平行光管光学性能影响分析  

Deformation of optical window and its influence on collimator's optical performance

作　　者：许亮[1] 李创[1] 樊学武[1] 

机构地区：[1]中国科学院西安光学精密机械研究所,陕西西安710119

出　　处：《应用光学》2010年第6期914-917,共4页Journal of Applied Optics

摘　　要：由于环境工况的多变性,光学窗口设计交叉了光、机、热等多种学科。在压差、轴向温差及径向温差工况下,分析光学窗口形变对某大口径、长焦距平行光管光学性能的影响,建立了光学窗口的有限元模型,与理论结果进行对比,验证了该有限元模型的有效性。以有限元分析得出的光学窗口变形数据为输入数据,带入改进了的Zernike多项式光机分析接口程序,获得了与像差对应的Zernike系数。用得到的Zernike系数表示光学窗口面型,以波像差作为光学系统成像质量评价指标,分析光学窗口变形对大口径、长焦距平行光管系统光学性能的影响。结果表明:光学窗口变形对平行光管系统光学性能的影响可以忽略不计。For various applications,the develoment of optical window is a multi-discipline engineering effort,which involves optics,mechanics and thermology.Under the circumstance of pressure difference,as well as axial and radial temperature difference,the finite element model（FEM） of optical window is established.The FEM was compared with the theoretical results and validated.Taking FEA data as the input at the interface of modified Zernike polynomial structural/optical analysis,the Zernike coefficients corresponding to aberrations are abtained.Using the obtained Zernike coefficients as the figure of optical window,wave aberration and MTF as measure of imaging quality,the impact of optical window＇s deformation on optical performance of large-aperture and long focus collimator was analyzed.The results show that the impact is negligible.

关 键 词：光学窗口 有限元分析 大口径、长焦距平行光管 ZERNIKE 波像差 

分 类 号：O43[机械工程—光学工程] TH741[理学—光学]