一种具有多种成像倍率的电视跟踪测量物镜

在飞行试验中，采用直接成像的电视跟踪系统对飞行目标进行自动跟踪和测量，不仅观察方便，而且更适合于对视频信号数字化和图像处理。电视系统要执行在作用距离内对飞行目标的搜索、跟踪和测量等功能，单靠一种固定焦距的电视物镜显然是不够的。介绍了一种具有三种成像倍率的变焦距电视物镜，着重描述了其结构组成、技术性能及特点。借助于三种成像倍率的变化，系统得以实现形心跟踪、边缘跟踪和相关跟踪等多种跟踪方式，从而完成地多种成像状态下对飞行目标的自动跟踪和测量，如远距离的点目标，近距离体目标的某部位以及复杂背景中的动目标等。

A kind of TV tracking and measuring lens with multiple magnifications

In flying test,the TV tracking system is usually applied to automatically follow the flying targets because of its convenience to our observation as well as the digitalization and processing of video information. It is obvious that the TV lens with one kind of focal length can not meet the needs of searching,tracking and measuring in the tracking coverage. A TV zoom lens with three kinds of magnifications is introduced. The structure,the properties and the advantages are mainly described. By means of this zoom lens,the TV system is able to work in multiple tracking modes,such as centroid tracking,edge tracking and correlation tracking,and finally capable of tracking or measuring the flying targets under various cases including spot targets at long range, space targets at short range and moving targets under complicated situation etc.