摘要
以某三十倍连续变焦镜头为例,研究了改变曲线压力角的方法。以压力角为目标函数,将凸轮曲线转角构造为分段函数对转角重新划分,压力角过大位置分配较大转角,压缩压力角较小处的转角,从而降低曲线整体压力角,并可有效抑制曲线中较大拐点.利用Matlab进行仿真计算,对比多种转角分配取值的优化结果,得到相对优化的凸轮曲线.优化结果使得曲线最大压力角值由原始的76.9°降低为41.9°.经试验验证,利用该方法优化完的变焦镜头成像质量良好,光轴跳动不大于3个像素,光轴稳定性不大于1个像素.
Taking a 30×continuous zoom lens as an example,the method of changing the pressure angle of the curve is researched.The pressure angle is taken as the objective function,and the cam curve rotation angle is constructed as a piecewise function to re-divide the angle,the position where the pressure angle is too large is distributed large rotation angle,and the rotation angle of position where the pressure angle is small is compressed,so as to reduce the overall pressure of the curve,and also to restrain the large inflection point effectively in the curve.The optimization results of various angular allocation values are compared with the simulation using Matlab and the optimal cam curve is obtained.The optimal result reduces the maximum pressure angle of the curve from the original 76.9°to 41.9°.The experimental results show that the zoom lens optimized by this method has good imaging quality,the line-of-sight liner is not more than 3 pixels,and the stability of the line-of-sight is not more than 1 pixel.
作者
彭建伟
史魁
雷杨杰
梅超
武力
PENG Jian-wei;SHI Kui;LEI Yang-jie;MEI Chao;WU Li(Xi′an Institute of Optics and Precision Mechanics,Chinese Academy of Sciences,Xi′an 710119,China)
出处
《光子学报》
EI
CAS
CSCD
北大核心
2019年第12期204-209,共6页
Acta Photonica Sinica
基金
国家重点研发计划(No.2016YFC0803000)
陕西省自然科学基础研究计划(No.2019JQ-295)~~
关键词
大变倍比
连续变焦系统
凸轮曲线
优化设计
压力角
Large zoom ratio
Continuous zoom system
Cam curve
Optimal design
Pressure angle
作者简介
第一作者:彭建伟(1988-),男,工程师,硕士,主要研究方向为光学仪器系统结构设计.Email:pengjianwei13@mails.ucas.ac.cn。
