Improving the profile integrity of germanium fresnel lenses in micro grooving processes

Jiwang Yan, Yufeng Fan, Tsunemoto Kuriyagawa, Nobuhito Yoshihara

Research output: Contribution to conferencePaper

Abstract

Ductile mode micro grooving with a sharply-pointed diamond tool under three-axis numerical control can fabricate precise micro Fresnel structures on single crystal germanium. However, in a practical durable machining process, the tool tip will wear gradually and finally produce micro chippings at the edges of the micro prisms. In the present paper, a new tool path is proposed in order to prevent the occurrence of micro chippings. The micro fractures occurred in machining can be completely removed during the following cut, thus leave the micro prisms damage free. Experimental results have demonstrated that the proposed method can significantly improve the profile integrity of a Fresnel lens and enable longer effective tool life.

Original languageEnglish
Publication statusPublished - 2007 Dec 1
Event4th International Conference on Leading Edge Manufacturing in 21st Century, LEM 2007 - Fukuoka, Japan
Duration: 2007 Nov 72007 Nov 9

Other

Other4th International Conference on Leading Edge Manufacturing in 21st Century, LEM 2007
CountryJapan
CityFukuoka
Period07/11/707/11/9

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Keywords

  • Ductile machining
  • Fresnel lens
  • Germanium
  • Micro groove
  • Tool wear
  • Ultraprecision cutting

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering

Cite this

Yan, J., Fan, Y., Kuriyagawa, T., & Yoshihara, N. (2007). Improving the profile integrity of germanium fresnel lenses in micro grooving processes. Paper presented at 4th International Conference on Leading Edge Manufacturing in 21st Century, LEM 2007, Fukuoka, Japan.