Experimental study for the influence of surface characteristics on the fringe patterns

Yifan Wei; Jiangtao Xi; Yanguang Yu; Qinghua Guo; Yongkai Yin

doi:10.1117/12.2071295

13 November 2014 Experimental study for the influence of surface characteristics on the fringe patterns

Yifan Wei, Jiangtao Xi, Yanguang Yu, Qinghua Guo, Yongkai Yin

Proceedings Volume 9276, Optical Metrology and Inspection for Industrial Applications III; 92760W (2014) https://doi.org/10.1117/12.2071295
Event: SPIE/COS Photonics Asia, 2014, Beijing, China

Abstract

Fringe projection profilometry (FPP) has been widely used for three dimensional (3D) imaging and measurement. The fringe acquisition of FPP mainly depends on the diffuse light from the surface of objects, thus the characteristics of object surface have significant influence on phase calculation. One of the essential factors related to phase precision is modulation index, which has a direct relationship with the surface reflectivity. This paper presents a comparative study which focuses on the modulation index of different materials. The distribution of modulation index for different samples is statistical analyzed, which leads to the conclusion that the modulation index is determined by the diffuse reflectivity rather than the type of materials. This work is helpful to the development of effective de-noising algorithms to improve the measurement accuracy.

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Yifan Wei, Jiangtao Xi, Yanguang Yu, Qinghua Guo, and Yongkai Yin "Experimental study for the influence of surface characteristics on the fringe patterns", Proc. SPIE 9276, Optical Metrology and Inspection for Industrial Applications III, 92760W (13 November 2014); https://doi.org/10.1117/12.2071295

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KEYWORDS

Modulation

Fringe analysis

Cameras

3D metrology

Reflectivity

Phase shift keying

3D image processing

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