Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Journal of Tsinghua University(Science and Technology)》 2007-08
Add to Favorite Get Latest Update

Design and machining of an Archimedes spiral Fresnel lens

ZHAO Tong1,ZHANG Hui1,LI Weiqian2,JIANG Hong3,YE Peiqing1(1.Department of Precision Instruments and Mechanology,Tsinghua University,Beijing 100084,China;2.Spark Machine Tool Company,Tianshui 741024,China;3.School of Mechanical & Electronic Control Engineering,Beijing Jiaotong University,Beijing 100044,China)  
The production of homocentric loop Fresnel lens using diamond cutters with turning needs extremely high performance processing systems,but the production efficiencies are low.This paper gives a design method for Archimedes spiral Fresnel lens that are easy to produce.Comparison of the geometrical focusing and the energy transmissivities shows that those two kinds of Fresnel lens are almost the same.A method is then given to design the turning cutter track for large Archimedes spiral Fresnel lenses.The analysis considers the influence of the NC turning machine axes precision on the lenses optical capabilities.The primary factors affecting the lenses are the angle of cutter swing and the feed normal to the lens surface.The precision can be enhanced by a micro feeding device for the axial cutter feed.
【Fund】: 国家“八六三”高技术项目(2004AA424160)
【CateGory Index】: TG51
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved