%0 Journal Article
%T The Study at Automatic Focusing Systems and Methods of Calibrated Focal Length Used in Precision Measurement<br>用于精密测量的自动变焦系统及标校方法的研究
%A Yang Xiaojun
%A Su Xiuqin
%A Hao Wei
%A Liu Gang
%A Li Zhe
%A Yang Xiufang
%A <br>杨小君
%A 苏秀琴
%A 郝伟
%A 李哲
%A 刘刚
%A 杨秀芳
%J 光子学报
%D 2005
%I 
%X Introduced a method of controlling and calibrating focal length about zoom lens used in precision measurement in High-Speed TV Measurement Instrument. Systems adopted PC104 SysCentreModule, Motion Controller and Step Motor to realize precision control in the zoom systems. In addition,correct lens systematic error by precise calibrated focal length. In this method,it became possible that High-Speed TV Measurement Instrument Systems based on zoom lens were used in trajectory measurement and to improve measurement accuracy in shooting range greatly.
%K High-speed TV measurement
%K Automatic focusing
%K Zoom lens
%K Calibrated focal length<br>高速电视测量
%K 自动变焦
%K 变焦镜头
%K 标校
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=9F6139E34DAA109F9C104697BF49FC39&aid=AB532A6D58D08AA6&yid=2DD7160C83D0ACED&vid=339D79302DF62549&iid=59906B3B2830C2C5&sid=8827E7669C34610F&eid=FEE377A727789A99&journal_id=1004-4213&journal_name=光子学报&referenced_num=3&reference_num=6