Inline LIPSS monitoring method employing light diffraction

Aleksandra Michalek*, Tahseen Jwad, Pavel Penchev, Tian See, Stefan Dimov

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Laser induced ripples that are also known as Laser Induced Periodic Surface Structures (LIPSS) have gained a considerable attention by researchers and industry due to their surface functionalization applications. However, texturing large areas or batch manufacture of parts that incorporate LIPSS surfaces, require the development of tools for monitoring the LIPSS generation and potentially for controlling their main geometrical characteristics, i.e. spatial periodicity, orientation and amplitude. In this context, the focus of the research reported in this paper is on developing process monitoring and inspection methods for identifying shifts and changes in these characteristics. One of the well-known and widely used by industry method for characterising and inspecting surfaces is light scattering and this research investigates the capabilities of this method for inline monitoring of LIPSS optical response. A simple setup was designed and implemented for measuring the diffraction angle and intensity of the reflected light from LIPSS surfaces. The capabilities of this concept for determining relative shifts in the optical response on surfaces processed with known disturbances such as incident angle deviations and focus offset, were investigated. Sensitivity of the method proved to be sufficient to detect shifts/deviations from LIPSS reference and thus potentially to monitor their generation inline with a simple sensor, e.g. the LIPSS treatment of larger tool surfaces or serial manufacture of holograms.
Original languageEnglish
Article number011002
Number of pages7
JournalJournal of Micro and Nano-Manufacturing
Issue number1
Early online date19 Feb 2020
Publication statusPublished - Mar 2023

Bibliographical note

Funding Information:
The work was carried out within the H2020 FoF program “High-Impact Injection Moulding Platform for mass-production of 3D and/or large micro-structured surfaces with Antimicrobial, Self-cleaning, Anti-scratch, Anti-squeak and Aesthetic functionalities” (HIMALAIA), the ITN program “European ESRs Network on Short Pulsed Laser Micro/Nanostructuring of Surfaces for Improved Functional Applications” (Laser4Fun) and of the UKIERI DST program “Surface functionalization for food, packaging, and healthcare applications.” Also, the authors would like to thank the Manufacturing Technology Center (MTC) for the financial support of Aleksandra Michalek’s Ph.D. research.

Publisher Copyright:
© 2020 American Society of Mechanical Engineers (ASME). All rights reserved.


  • light diffraction
  • femtosecond laser

ASJC Scopus subject areas

  • Mechanics of Materials
  • Process Chemistry and Technology
  • Industrial and Manufacturing Engineering


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