%0 Journal Article
%T Design of an Objective Lens for Womb Electronic Endoscope with High Definition, Non-blind Spot and Thinner Outer Diameter<br>高清晰低畸变细径化电子内镜物镜设计
%A ZHANG Mei
%A WANG Zhao-qi
%A <br>张梅
%A 王肇圻
%J 光子学报
%D 2008
%I 
%X An electronic endoscope objective lens with a field-of-view of 74° was designed for medical application. The electronic endoscope is with an outside diameter of 8 mm that makes the anaesthesia avoidable, and a flexible head that realizes non-blind spot diagnosis. The effective focus length of the objective is 4 mm while the back working length is 4.8 mm. The maximum distortion of the system is less than 4% and the maximum field curvature is 0.27 mm. In order to improve the imaging performance, the aspheric surface into the system of 5 elements was introduced. The designed optical system especially matches the requirements of a CCD detector with 0.25 inches and SVGA display model.
%K Lens design
%K Inverse telephoto lens
%K Electronic endoscope
%K Objective lens
%K Aspheric surface<br>光学设计
%K 反摄远镜头
%K 电子内窥镜
%K 物镜系统
%K 非球面
%K Lens
%K design
%K Inverse
%K telephoto
%K lens
%K Electronic
%K endoscope
%K Objective
%K lens
%K Aspheric
%K surface
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=9F6139E34DAA109F9C104697BF49FC39&aid=CA4293BEFC48E764A73C5AD299037B49&yid=67289AFF6305E306&vid=42425781F0B1C26E&iid=0B39A22176CE99FB&sid=A5B34D9E8FDA439A&eid=717CC18E05F2AFA0&journal_id=1004-4213&journal_name=光子学报&referenced_num=0&reference_num=9