A framework of a process modelling and optimization system for the design, fabrication and evaluation of progressive lenses

Chi Fai Cheung, L. T. Ho, L. B. Kong, Suet To, K. T. Lai

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

To provide a clear and comfortable intermediate vision for presbyopic patients, there is a growing need to replace the traditional single vision, bifocal and trifocal lenses by Progressive Addition Lenses (PAL) with a small interval of degree. They are mainly tailor-made and expensive. Injection moulding of PALs is suggested in this paper to reduce the cost, so that more people can afford to have one. Ultra-precision freeform polishing (UPFP) is a technology that can machine precision moulds with submicrometer form accuracy and surface finish in nanometer range. In this paper, a framework of a process modelling and optimization system is presented for supporting the design, fabrication and measurement. A pilot experiment has been done to verify the framework and encouraging results have been obtained.
Original languageEnglish
Title of host publicationProceedings of the 11th International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2011
Publishereuspen
Pages409-412
Number of pages4
Volume2
ISBN (Electronic)9780955308291
Publication statusPublished - 1 Jan 2011
Event11th International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2011 - Como, Italy
Duration: 23 May 201126 May 2011

Conference

Conference11th International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2011
Country/TerritoryItaly
CityComo
Period23/05/1126/05/11

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering
  • Mechanical Engineering
  • Materials Science(all)
  • Instrumentation
  • Environmental Engineering

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