Paper Title:
Diamond Turning Freeform Optics
  Abstract

Freeform optics fabrication has become one of the hottest topics in optics industry in recent years. Although it still remains a challenge, many have tried different ways of manufacturing it. Some have achieved degrees of success. By means of a Nanotech 350-FG five axis diamond turning machine, we too have successfully produced some prototype freeform optics and lens arrays with Slow Tool Servo and Milling method. The produced freeform optics are mainly for automobile LED headlamps and the lens arrays are for LED illumination. In order to produce the freeform optics, we developed our own DT Slow Tool Servo program which is capable of generating a DT program for diamond turning a universal/general 3D freeform surface. Slow Tool Servo technique and Diamond Milling technique were mainly employed to produce these freeform surfaces. The manufacturing process and machining parameter details will be given in the paper. The two main methods we used will be compared and discussed as well. In measuring the freeform surface, a 3D white light interferometer was used to scan and obtain the surface coordinates. The software made by ourselves enabled us to compare the measure results of the work piece with that of the design drawings. The deviation of our finished forms is within 5 um from that of the nominal. The surface quality Rq is about 10 nm. Measuring equipment and methodology will also be discussed in the paper.

  Info
Periodical
Key Engineering Materials (Volumes 364-366)
Edited by
Guo Fan JIN, Wing Bun LEE, Chi Fai CHEUNG and Suet TO
Pages
1-6
DOI
10.4028/www.scientific.net/KEM.364-366.1
Citation
W. Jiang, B. Tse, R. Louie, F. Chan, "Diamond Turning Freeform Optics", Key Engineering Materials, Vols. 364-366, pp. 1-6, 2008
Online since
December 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Su Juan Wang, Chi Fai Cheung, Sandy To, Wing Bun Lee
Abstract:Recently, the high quality and high productivity in fabrication of freeform optics has been of primary interest in manufacturing industries,...
412
Authors: Ling Bao Kong, Chi Fai Cheung, Wing Bun Lee, Sandy To
Abstract:This paper presents an integrated platform for modelling and measurement of freeform surface generation in ultra-precision raster milling....
422
Authors: Hua Li, Suet To, Ling Bao Kong, Chi Fai Cheung, Wing Bun Lee
Abstract:This paper presents the inspection technology for a freeform surface component which is named F-theta lens. F-theta lens is widely used in...
1191
Authors: Wing Bun Lee, H. Wang, Suet To, C.F. Cheung
V. MEMS and Ultra-Precision Machining
Abstract:Nowadays, the proliferation of commercial applications of consumer electronics and advanced optics has imposed extensive requirements on the...
834
Authors: Kui Liu, Pei Ling Liu, Hu Wu, Kah Chuan Shaw
Abstract:In this study, a computer numerical control (CNC) programming software platform for ultra precision machining of optical surfaces was...
595