大口径折反射式变焦距物镜的设计

Design of large aperture refractive-reflective zoom lens

介绍了一种大口径变焦距物镜的设计方法。该方法将整体光学系统分为前后两个部分,前端光学系统采用反射式的结构来满足大口径的要求,后端光学系统采用将变焦距物镜倒接的方式,在系统的一次像面处进行组合,通过对后端倒接变焦距物镜的优化设计来保证系统的成像质量。用具体的实例验证说明了该项设计,结果表明这种设计方法是可行的,系统结构简单紧凑,解决了大口径光学系统难以实现连续变焦的问题。

An optical design method for large aperture zoom optical system was introduced. The opti cal system was divided into two segments called front optical system and back optical system. The front optical system used a reflective system to meet the request of large aperture and the other one used a converse zoom objective. The two segments were assembled at the first imaging of the optical system to ensure the imaging quality of the optical system through optimizing the converse zoom objective of back optical system. This method is proved feasible from a design example,it also shows that designed system is simple and compact and easy to fucus for zoom lens with large aperture.