五组元变焦镜头凸轮曲线设计

摘要

变焦镜头设计过程中,为了实现变焦镜头更好的变焦效果,需要设计出优良的变焦凸轮,而变焦凸轮曲线的设计是设计出好的变焦凸轮的关键,变焦凸轮曲线设计的好坏直接影响最终成像质量.首先通过对投影灯镜头系统划分为五组元变焦结构,在CODE V中将所得镜头材料转成SCHOOT材料,并在CODE V中把变焦过程设置成9重结构的方式,然后运行五组元变焦宏程序后,得到五组元变焦镜头的变焦数据,最后利用AUTOCAD软件的多线PL命令最终作出变焦镜头凸轮曲线图.所得凸轮曲线既要保证凸轮有较小的压力角,还要有一定的锁紧力.%For better zoom effect, it is necessary to include superior zoom cam while designing zoom lens. As the major tool for achieving superior zoom cam, cam curve design directly affects the final imaging quality. In this work, we first categorized a projector lamp system into a five-component zoom structure. Next, we transformed the lens material to SHOOT material, and set the zoom process into nine structures using CODE V optical design software. The five-component zoom macro program was then run, and data was obtained using thefive-component zoom lens. Finally, zoom lens cam curves were obtained using the PL multiline command of AutoCAD. They were observed to exhibit a relatively small pressure angle and specific locking force.