On-machine surface texture measuring system using laser speckle pattern analysis

Motochika Shimizu, Hiroshi Sawano, Hayato Yoshioka, Hidenori Shinno

Research output: Contribution to journalArticle

3 Citations (Scopus)


Functional surfaces are expected technologies in various industries. However, the efficient generation of microscale surface structures is difficult because the process relies on precision surface texture assessments, which require long measuring times. An on-machine measuring system may solve this issue. In this study, a new on-machine surface texture measuring system based on laser speckle pattern analysis is proposed. The proposed system efficiently assesses various qualities of the surface texture, such as surface roughness, undulation of microscale surface structures, and anisotropy, from a laser speckle pattern obtained from the precision-machined surface. For precise measurements, disturbances caused by the machining system itself and the environment must be avoided. The laser speckle detection unit in the proposed system is supported by non-contact active vibration-isolation units, which reduce the transmission of ground vibrations. From the experimental results, the system indicated high repeatability in measurements and robustness against disturbances.

Original languageEnglish
Pages (from-to)69-77
Number of pages9
JournalInternational Journal of Automation Technology
Issue number1
Publication statusPublished - 1 Jan 2016



  • Laser speckle
  • On-machine measurement
  • Optical measurement
  • Surface texture

Cite this