新型离轴反射式变焦光学系统设计

New design of an off-axis reflective zoom optical system

介绍了一种基于初级像差理论和矢量像差理论的机械补偿式新型离轴三反变焦系统的设计。提出了反射变焦系统初始结构的确定方法,对初级像差方程进行了约束优化,得到了满足要求的部分共轴初始结构参数。指出了利用矢量像差理论进行离轴反射变焦系统设计的必要性,提出了弥补共轴系统不足的离轴反射变焦光学系统的设计方法,分析了相应的去除遮拦、矫正像差的设计理论,并结合具体的设计指标,采用CODEV光学设计软件,设计出符合系统指标要求的离轴三反变焦光学系统,并对其进行了像质评价。结果表明,成像质量良好,满足总技术指标的要求。

A method based on Seidel aberration theory and vector aberration theory was introduced for the design of mechanically compensated off-axis reflective zoom system with three mirrors. The method to achieve the initial construction parameters of zoom system was given. By constraining optimization of a set of Seidel aberration coefficient functions, the initial co-axial construction parameters were achieved. The necessity of the design of off-axis reflective zoom system based on vector aberration theory was advanced. The design method of off-axial reflective zoom system was introduced to make up for the disadvantages of co-axial reflective zoom system. The design theory about obscuration elimination and aberration correction was also analyzed. Based on the detailed indexes, an optical system was designed with the optical design software CODEV, and its image quality was evaluated. The result shows that the image of the zoom optical system meets the design demand.