Next Article in Journal
A Biomimetic Sensor for the Classification of Honeys of Different Floral Origin and the Detection of Adulteration
Previous Article in Journal
A Single-Walled Carbon Nanotube Network Gas Sensing Device
Sensors 2011, 11(8), 7773-7798; doi:10.3390/s110807773
Review

A Review of Optical NDT Technologies

1
, 1,2,* , 3
 and 2
Received: 1 July 2011; in revised form: 1 August 2011 / Accepted: 2 August 2011 / Published: 8 August 2011
(This article belongs to the Section Physical Sensors)
Abstract: Optical non-destructive testing (NDT) has gained more and more attention in recent years, mainly because of its non-destructive imaging characteristics with high precision and sensitivity. This paper provides a review of the main optical NDT technologies, including fibre optics, electronic speckle, infrared thermography, endoscopic and terahertz technology. Among them, fibre optics features easy integration and embedding, electronic speckle focuses on whole-field high precision detection, infrared thermography has unique advantages for tests of combined materials, endoscopic technology provides images of the internal surface of the object directly, and terahertz technology opens a new direction of internal NDT because of its excellent penetration capability to most of non-metallic materials. Typical engineering applications of these technologies are illustrated, with a brief introduction of the history and discussion of recent progress.
Keywords: optical non-destructive testing (NDT); speckle; endoscopic; infrared thermography; terahertz (THz) technology optical non-destructive testing (NDT); speckle; endoscopic; infrared thermography; terahertz (THz) technology
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Export to BibTeX |
EndNote


MDPI and ACS Style

Zhu, Y.-K.; Tian, G.-Y.; Lu, R.-S.; Zhang, H. A Review of Optical NDT Technologies. Sensors 2011, 11, 7773-7798.

AMA Style

Zhu Y-K, Tian G-Y, Lu R-S, Zhang H. A Review of Optical NDT Technologies. Sensors. 2011; 11(8):7773-7798.

Chicago/Turabian Style

Zhu, Yong-Kai; Tian, Gui-Yun; Lu, Rong-Sheng; Zhang, Hong. 2011. "A Review of Optical NDT Technologies." Sensors 11, no. 8: 7773-7798.


Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert