摘要
在摄影测量中,用变焦距镜头摄取图像时,需对变焦的全过程做实时的检测。这一焦距检测的过程是通过对镜头各镜组间距的检测完成的,并采用实验的方法,通过布设控制点,首先在变焦镜头使用之前对变焦起始位置的镜头焦距进行检测。论述了变焦镜头焦距实时检测的基本原理、精度分析及具体实施方案。
A method using focuschanged lens to obtain photogrametric image needs to do realtime test for the whole focus changing process. Through experiments and setting control points, this process is accomplished by changing distance between lens groups. Before using focuschanged lens, the original focus should be got. The basic theory, precision analysis and the conerete applying scheme of focus realtime test for focuscharged lens have been discussed.
基金
陕西省自然科学基金项目(2002D12)
关键词
变焦镜头
实时检测
摄影测量
focus-changed lens
real-time test
photogrammetry
