1) hyperfocal chart
双焦距测定表
2) hyperfocal chart
超焦距测定表
4) mser-two-focus velocimetry
激光双焦距测速
5) bifocal
[英]['bai'fəukəl] [美]['baɪ'fokḷ]
双焦距的
6) focal length measurement
焦距测量
1.
Research on focal length measurement based on digital image processing;
基于数字图像处理方法的焦距测量技术研究
2.
A new method for long focal length measurement is presented, which is accomplished by obtaining the angle of moiré stripe formed by Talbot effect of Ronchi grating.
这种长焦距测量方法具有实时测量、精度高的特点。
3.
Based on these, a novel method for long focal length measurement is presented, which is achieved by calculating the angle of Moire fringes formed by Talbot image of one Ronchi grating and another Ronchi grating.
本文介绍了焦距测量的常用方法，并且结合本课题的应用背景，以Ronchi光栅为例对Talbot效应和Moiré条纹现象进行了理论分析和公式推导。
补充资料：超焦距
超焦距(Hyperfocal distance)同于定焦距。镜头对某距离对焦时，以其距离为中心，从前方到后方的一定距离属于景深，算是对准了焦点。其后方的景深超出无限远的距离，称为超焦距。愈是缩小镜头光圈，景深愈大，而超焦距离变小。对超焦距固定焦点的是定焦照相机。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条