Digital holographic inspection system for the inner surface of a straight pipe

Optics and Lasers in Engineering Volume 97 Page 62-70 published_at 2017-10
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Title
Digital holographic inspection system for the inner surface of a straight pipe
Creator
Yokota Masayuki
Koyama Teppei
Takeda Kazufumi
Source Title
Optics and Lasers in Engineering
Volume 97
Start Page 62
End Page 70
Journal Identifire
ISSN 0143-8166
Descriptions
A multicolor digital holographic inspection system achieving both automatic scanning sensing head and automatic correction of a distortion in the profile due to positional error of a sensing head has been applied to the inner surface of a straight brass pipe having artificial defects on its wall. To investigate the inner surface of the pipe, the sensing head consisting of a cone-shaped mirror (CSM) glued to an aluminum base in the pipe is illuminated by the collimated RGB laser beams from the outside of the pipe. In the system, by changing the wavelength of the illumination light and scanning the CSM in the pipe, data acquisitions and analysis are performed using a personal computer. It is shown that the pipe inspection, including a classification of defects, can be successfully conducted by comparing the multicolor intensity images and the height profile of inner surface of pipe.
Subjects
Digital holographic system
Holographic interferometry
Multiwavelength
Pipe inspection
Language
eng
Resource Type journal article
Publisher
Elsevier Ltd
Date of Issued 2017-10
Publish Type Accepted Manuscript
Access Rights open access
Relation
[DOI] 10.1016/j.optlaseng.2017.05.012