On-machine measurement and characterization of V-groove structure pattern on precision rollers

Chi Fai Cheung, Ming Jun Ren, Da Li, Ling Bao Kong, Suet To, Jibin Li

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

9 Citations (Scopus)


Rolling imprint lithography is an enabling technique for the mass production of ultra-precision micro-structured surfaces which are widely used in high value added optical products such as backlight guides for display devices. The accuracy of the produced micro-structured surfaces relies heavily on the master roller of which quality is difficult to be controlled by traditional off-line measurement process due to the large dimension and heavy weight of the workpiece. This paper presents a CCD based non-contact measurement system to perform the on-machine measurement of the structure pattern on machined rollers. Instead of measuring each single structure on the roller, the system is more focused on the characterization of the conformance of the structure pattern with the designer's requirement. Low angle monochromatic light is used to extract the structure pattern on the machined roller using a high magnification objective lens with a high resolution CCD sensor. The image processing techniques are then employed to characterize the captured image based on the designed pattern structure. The developed system has been mounted on a single-point diamond turning machine to measure the machined structured roller, and the results indicate that the developed measurement system is able to perform the on-machine measurement and characterization of the structure pattern of the machined roller with sub-micrometre accuracy.
Original languageEnglish
Title of host publicationAdvances in Optics Manufacture
Number of pages8
Publication statusPublished - 26 Jul 2013
EventAsia Pacific Conference on Optics Manufacture 2012, APCOM 2012 - Changchun, China
Duration: 26 Aug 201228 Aug 2012

Publication series

NameKey Engineering Materials
ISSN (Print)1013-9826


ConferenceAsia Pacific Conference on Optics Manufacture 2012, APCOM 2012


  • On-machine measurement
  • Precision rollers
  • Precision surface measurement
  • Structured surface
  • Surface characterization

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering


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