三点支撑变形对三反射消像散望远镜像散场的影响

发布时间：2018-06-22 20:01

本文选题：光学设计 + 像散场　；参考：《光学学报》2016年06期

【摘要】：为了提高大口径望远镜的装调效率,对具有三点支撑变形的大口径三反射消像散望远镜在装调过程中的像散场分布进行了研究。采用矢量像差理论和孔径坐标变换,分析了在孔径光阑和非孔径光阑处反射镜存在三点支撑变形时,像散在望远镜失调和非失调情况下的分布特性。最后,在光学设计软件CODE V中利用条纹Zernike多项式Z10和Z11来模拟反射镜三点支撑变形引入的面形误差,通过实际光线追迹对像散场分布特性进行了验证。分析结果表明:当三点支撑变形位于主镜(孔径光阑)上时,不会影响望远镜的像散场分布;当三点支撑变形位于次镜或三镜(非孔径光阑)上时,将会产生与视场共轭成线性的像散项,导致望远镜在失调或非失调情况下的像散出现不同的分布特性。在最终装调时,通过分析像散场的分布可对望远镜的装调状态进行定性的分析,从而为大口径三反射消像散望远镜的装配提供指导。
[Abstract]:In order to improve the adjustment efficiency of the large aperture telescope, the distribution of the scattered field of the large aperture three reflection astigmatism telescope with three supports and deformation was studied. By using vector aberration theory and aperture coordinate transformation, the distribution characteristics of astigmatism in the case of misalignment and non-misalignment of telescopes are analyzed when the mirror has three-point supported deformation at the aperture and non-aperture apertures. Finally, using the fringe Zernike polynomials Z10 and Z11 in the optical design software code V, the plane shape error caused by the three-point support deformation of the reflector is simulated, and the distribution characteristics of the scattered field are verified by the actual ray tracing. The results show that when the three-point support deformation is located on the primary mirror (aperture), it will not affect the scattered field distribution of the telescope, and when the three-point support deformation is on the secondary mirror or the three-mirror (non-aperture), The astigmatism will be linearly conjugated with the field of view, which will lead to different astigmatism in the case of misalignment or non-misalignment. By analyzing the distribution of the scattered field, the installation state of the telescope can be qualitatively analyzed, thus providing guidance for the assembly of the large aperture three-reflection astigmatic telescope.
【作者单位】：中国科学院西安光学精密机械研究所空间光学应用研究室;中国科学院大学;
【基金】：西部之光项目(J14-032)
【分类号】：TH743

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