光学学报, 2005, 25 (4): 538, 网络出版: 2006-05-22
透镜自重变形引起波像差的有限元分析 下载: 538次
Finite Element Analysis for Wavefront Error of Lenses Induced by Gravity
光学器件 透镜 平行光管 波像差 有限元分析 星间光通信 optical devices lens collimator wavefront error finite element analysis space laser communication
摘要
在用大口径、长焦距平行光管模拟激光远场特性时,其光组透镜在重力作用下的变形不能忽略,为了分析对出射光束质量的影响,采用有限元分析软件“ANSYS”建立了平行光管光组中??400 mm平凸透镜的有限元模型,给出一种分析透镜轴向变形引起的波像差的方法,在不同工况下,计算了平凸透镜在重力作用下轴向变形的峰谷值和均方根值,对轴向变形量均方根值最小工况画出了透镜表面变形的等值线图,计算了??350 mm通光口径内的波像差峰谷值和均方根值,对平行光管光组的波像差做出估计,验证了设计的合理性。
Abstract
When collimator with big diameter and long focal length is used to simulate laser far-field character, the deformation of its lens under gravity cannot be ignored. To analyze the effect, finite element analysis software ANSYS is adopted to simulate a ??400 mm plano-convex lens from a collimator, and a method is presented to analyse wavefront error caused by axial deformation of lens, P-V and RMS values of axial deformations under gravity are computed in different cases, the contours of lens surface are plotted when RMS values of axial deformations is the smallest, the P-V and RMS wavefront error in ??350 mm are also calculated, finally the wavefront error of lenses is estimated in optimal case, and the rationality of collimator design is validated.
张德江, 刘立人张德江, 徐荣伟张德江, 李大汕张德江. 透镜自重变形引起波像差的有限元分析[J]. 光学学报, 2005, 25(4): 538. 张德江, 刘立人张德江, 徐荣伟张德江, 李大汕张德江. Finite Element Analysis for Wavefront Error of Lenses Induced by Gravity[J]. Acta Optica Sinica, 2005, 25(4): 538.