600mm望远镜液晶自适应系统成像光路设计

为了与600 mm望远镜匹配以验证液晶自适应光学的有效性,利用Zemax光学设计软件进行了液晶自适应光学系统的设计和优化.根据望远镜的参量、大气湍流的特性和液晶的特点提出设计要求,然后进行光学系统设计和Zemax软件模拟优化,设计出了满足要求的系统.对该光学系统进行性能评价.设计出的系统与望远镜的组合焦距为35 m, F数为58.求得光学系统在像面处的极限线分辨力为44.8 μm,成像CCD的像元尺寸为16 μm,满足采样定理.液晶自适应光学系统的调制传递函数与衍射极限传递函数非常接近,而且系统的光程差像差在0.1λ左右,说明系统具备优良的光学性能.

Design on Liquid Crystal Adaptive Optical System for 600 mm Telescope

In order to verify the validity of liquid crystal adaptive optics with a 600 mm telescope, Zemax software is used to design the liquid crystal adaptive optical system. The design demands are given according to the parameters of telescope, the turbulence and the liquid crystal. The optical system is designed with the above demands with Zemax software, and the characteristic of the system is evaluated. The focal length of the whole optical system is 35 m and the F number is 58. The limited line resolution at the image plane is 44.8 μm. It satisfies the sampling theorem because the size of the imaging CCD is 16 μm. Designed modulation tranfer function (MTF) of the liquid crystal adaptive optical system is almost the same as the diffraction limited MTF. Optical path difference (OPD) aberration of the system is about 0.1λ. The results show that the adaptive optical system has better optical characteristics.