A method for multi-resolution characterization on porous surfaces by using a laser confocal scanning microscope. (November 2015)

• Record Type: Journal Article
• Authors: Zou, Yibo; Kaestner, Markus; Reithmeier, Eduard
• Is Part Of: Optics and lasers in engineering. Volume 74(2015)
• Page Start: 40
• Page End: 46
• Publication Date: 2015-11
• Subjects: Multi-resolution -- Surface registration -- Characterization -- Porous surface; Lasers in engineering -- Periodicals; Optical measurements -- Periodicals; Optics -- Periodicals; Lasers en ingénierie -- Périodiques; Mesures optiques -- Périodiques; Optique -- Périodiques; 621.36605
• DOI: 10.1016/j.optlaseng.2015.05.005
• Languages: English
• ISSNs: 0143-8166

Abstract

Abstract: In this paper, a new method for multi-resolution characterization is introduced to analyze porous surfaces on cylinder liners. The main purpose of this new approach is to investigate the influence of resolution and magnification of different optical lenses on measuring the 3D geometry of pores based on 3D microscopy topographical surface metrology. Two optical sensors (20× lens and 50× lens) have been applied to acquire the porous surface data for the primal investigation. A feature-based image matching algorithm is introduced for the purpose of registering identical microstructures in different datasets with different pixel resolutions. The correlation between the sensor׳s resolution and the numerical parameters׳ values regarding the pores geometry is studied statistically. Finally, the preliminary results of multi-resolution characterization are presented and the impact of using a sensor with higher resolution on measuring the same object is discussed. Abstract : Highlights: Application of laser confocal microscope in the field of porous microstructure measurement. New multi-lenses characterization method. Application of advanced image processing method: SURF algorithm. Results provide a good instruction for selecting an appropriate lens.