变焦距镜头的凸轮优化设计

Cam optimization of a zoom lens

变焦距镜头由于其固有特点而得到越来越广泛的应用 ,目前 ,连续变焦的变焦距镜头普遍采用机械补偿型光学结构 ,其中的特定光学透镜组通过凸轮的驱动沿光轴连续移动 ,从而实现连续变焦 ,其可变组元数大多为二组或更多。变焦凸轮的优化是实现变焦距镜头光学设计像质目标和连续变焦过程的关键 ,军用变焦距镜头尤其应考虑其变焦运动的平滑性和变焦过程的快速性。简述某二可变组元机械补偿型变焦距镜头的凸轮优化方法 ,给出适合不同凸轮数据点数和二可变组元变焦距镜头光学设计使用的Macro

Zoom lens has increasing applications for its inherent properties. At present, the continuous zoomed lens generally adopt the mechanical\|compensated optical configuration in which the given variable lenses groups move along the optical axis driven by a cam to achieve the continuous change of EFL , and it usually has two or more variable groups. Its cam optimization is the key to actualize the performance of its optical design and the zooming process, while the smoothness and speediness of zooming movement must be considered for a military use. The cam optimization method of a mechanical\|compensated zoom lens with two variable groups is briefly described and the main body of the Macro\|PLUS sequence which is suitable for different numbers of cam data points and optical design of the zoom lens with two variable groups are given.