1) flexible focus
变焦测距
2) zoom
[英][zu:m] [美][zum]
可变焦距<测>
3) Zoom
[英][zu:m] [美][zum]
变焦距
1.
Design of Infrared Zoom System;
红外变焦距光学系统的设计
2.
An optical design phocess of zoom objecting of which variable magnification and image shift compensction are completed with an optical compensating method.
本介绍采用光学补偿方式实现变倍和像移补偿的变焦距物镜的设计过程。
3.
According to the theory of optical compensated zoom,author designed optical compensated step zoom lenses.
根据光学补偿变焦距理论,作者设计出光学补偿式步进变焦物镜。
4) VFL (variable focal length)
可变焦距
1.
A novel VFL (variable focal length) system of a long working length(117mm), a short focus and a continuous zoom type range from 18mm to 57mm is studied.
研究了一种长工作距离（117mm）、短焦距、在18～57mm范围内连续可变焦距的YAG激光加工机新型光学聚焦系统，论述了系统的特点及基本原理，给出了有关设计参数。
5) zoom macroscope
可变焦距放大观测器
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：变焦距镜头
能在一定范围内改变焦距的摄影镜头。在照相机、电影摄影机或摄像机位置不变时，也能摄下被摄体由远到近或由近到远的画面。
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