Surface texture assessment of ultra-precision machined parts based on laser speckle pattern analysis

Motochika Shimizu, Hiroshi Sawano, Hayato Yoshioka, Hidenori Shinno

Research output: Contribution to journalArticle

11 Citations (Scopus)


Surface texture plays an important role in overall product specification, because the surface quality of the product is dominated by the nano-scale surface texture. This paper presents a surface texture assessment method for evaluating roughness and periodicity of surface structure with a laser speckle pattern analysis. By investigating the relation between surface texture and laser speckle pattern, characteristic parameters for describing a laser speckle pattern are proposed. The proposed characteristic parameters can evaluate the surface texture in entire observed area and in limited area in any given direction. Furthermore, the surface texture can be qualitatively assessed with a radar chart of the proposed laser speckle characteristic parameters.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalPrecision Engineering
Issue number1
Publication statusPublished - 1 Jan 2014



  • Characteristic parameter
  • Laser speckle
  • Machined surface
  • Micro-structure
  • Surface texture assessment

Cite this