Ultra-Precision Diamond Machined Freeform Optical Parts and Structures

H. H. Du, W. S. Yip, Z. W. Zhu, S. To

Research output: Chapter in book / Conference proceedingChapter in an edited book (as author)Academic researchpeer-review


Ultra-precision diamond machining (UPDM) is a key technology in the manufacture of high-quality parts with a surface roughness of a few nanometers and form accuracy in the sub-micrometer range. These high-quality parts have been widely applied in aerospace, optics, energy, electronics, mechanics, etc. The UPDM process generally uses a single-crystal diamond cutting tool, which possesses nanometric edge sharpness, form reproducibility, and wear resistance. This article elucidates three main types of UPDM: single-point diamond turning, ultra-precision fly cutting, and fast/slow tool servo diamond machining. Considering the significance of the machining accuracy for UPDM, the influencing factors, on-machine measurement methods, and error compensation methods are illustrated. The practical applications of UPDM are also exemplified and discussed.
Original languageEnglish
Title of host publicationEncyclopedia of Materials: Metals and Alloys
Number of pages16
ISBN (Electronic)9780128197264
ISBN (Print)9780128197332
Publication statusPublished - 1 Sept 2021


  • Fast-/slow tool servo diamond machining
  • Freeform lenses
  • LED
  • Machining accuracy
  • Microlens array
  • Optical parts
  • Single-point diamond turning
  • Ultra-precision diamond machining
  • Ultra-precision fly cutting
  • V-groove structures

ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)


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