Novel Approach to Improve the Optical Performance by Machining Process Without Surface Finishing

June Gyu Park, Dong Ho Lee, Hong Seung Kim, Woo Jong Yeo, Minwoo Jeon, Ji Yong Bae, Dong Uk Kim, Kye Sung Lee, Geon Hee Kim, Ki Soo Chang, I. Jong Kim

Research output: Contribution to journalArticlepeer-review


With the increase in dimensions of optical elements in addition to ever rising demand for aspherical optics, the millimeter-scale periodic waviness that is naturally produced by machining (such as diamond turning) process in precision optical engineering has been one of the most crucial issues in the development of high surface quality optical elements. Even an extremely small waviness can affect the laser beam profile significantly through interference caused by Bragg scattering. This paper presents a novel method for improving a laser beam profile by utilizing the characteristics of Bragg scattering without requiring established final surface finishing processes such as optical polishing. By engraving an artificial periodic structure with a period of a few hundred microns, the Bragg scattering angle that influences the formation of interference fringes in the laser beam profile was drastically enlarged. Consequently, the quality of the beam profile was improved at a propagation distance where the 0th and 1st (− 1st) order beam modes are spatially separated, only by diamond turning machining without the surface finishing process. In addition, this approach represents an important contribution to green technology, which seeks energy saving and waste reduction in the optical surface manufacturing process.

Original languageEnglish
Pages (from-to)1381-1392
Number of pages12
JournalInternational Journal of Precision Engineering and Manufacturing - Green Technology
Issue number5
Publication statusPublished - 2021 Sept

Bibliographical note

Funding Information:
This study was funded by the Korea Basic Science Institute (D010300), Creative Convergence Research Project in the National Research Council of Science and Technology of Korea (CAP-15-01-KBSI), and Korea Research Institute of Standards and Science (KRISS funding 3-1-06).

Publisher Copyright:
© 2021, The Author(s).

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Management of Technology and Innovation


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