The mathematic model and the characteristic curve of three kinds of focus measures are given in this article. The experimental devices of optical focal plane measurement erected by the use of three kinds of focus meas...The mathematic model and the characteristic curve of three kinds of focus measures are given in this article. The experimental devices of optical focal plane measurement erected by the use of three kinds of focus measures are introduced. The experimental results are discussed and analyzed.展开更多
为实现光具座上各种光学测量的自动化和数字化,将硅基液晶(Liquid Crystal on Silicon,LCOS)微显示器作为目标发生器,加入到光具座测量系统,取代传统的分划板,并以CMOS相机作为图像接收器,构建了数字光具座光学测量系统,提高了系统的灵...为实现光具座上各种光学测量的自动化和数字化,将硅基液晶(Liquid Crystal on Silicon,LCOS)微显示器作为目标发生器,加入到光具座测量系统,取代传统的分划板,并以CMOS相机作为图像接收器,构建了数字光具座光学测量系统,提高了系统的灵活性和适应性。针对数字光具座系统的特点,研究了数字图像目标的自动生成方法;基于数字相关原理,运用正弦分布的周期目标,研究了数字图像目标的高精度自动提取算法,实验数据表明该方法的重复性误差为8×10。采用数字拟合求周期的方式,研究小视场光学系统的焦距测量,实验结果表明,该方法相对误差为0.24%,可用于小视场光学系统焦距测量。展开更多
文摘The mathematic model and the characteristic curve of three kinds of focus measures are given in this article. The experimental devices of optical focal plane measurement erected by the use of three kinds of focus measures are introduced. The experimental results are discussed and analyzed.
文摘为实现光具座上各种光学测量的自动化和数字化,将硅基液晶(Liquid Crystal on Silicon,LCOS)微显示器作为目标发生器,加入到光具座测量系统,取代传统的分划板,并以CMOS相机作为图像接收器,构建了数字光具座光学测量系统,提高了系统的灵活性和适应性。针对数字光具座系统的特点,研究了数字图像目标的自动生成方法;基于数字相关原理,运用正弦分布的周期目标,研究了数字图像目标的高精度自动提取算法,实验数据表明该方法的重复性误差为8×10。采用数字拟合求周期的方式,研究小视场光学系统的焦距测量,实验结果表明,该方法相对误差为0.24%,可用于小视场光学系统焦距测量。
