Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Comparison of quantitative defect characterization using pulse-phase and lock-in thermography

Not Accessible

Your library or personal account may give you access

Abstract

Using optical excitation sources for active thermography enables a contactless, remote, and non-destructive testing of materials and structures. Currently, two kinds of temporal excitation techniques have been established: pulse or flash excitation, using mostly flash lamps; and periodic or lock-in excitation, using halogen lamps, LED, or laser arrays. From the experimental point of view, both techniques have their advantages and disadvantages. Concerning the comparison of the testing results of both techniques, only very few studies have been performed in the past. In this contribution, the phase values obtained at flat bottom holes in steel and CFRP and the spatial resolution measured at crossed notches in steel using flash and lock-in excitation are compared quantitatively.

© 2016 Optical Society of America

Full Article  |  PDF Article
More Like This
Inspection of disbonds in multilayer dissimilar metal structure using lock-in thermography

Zhenggan Zhou, Hanxue Zhao, Guangkai Sun, Pengfei He, Jin Fan, and Gen Li
Appl. Opt. 55(16) 4490-4496 (2016)

Defect detectability based on square wave lock-in thermography

Pengfei Zhu, Dan Wu, Yifan Wang, and Zhifei Miao
Appl. Opt. 61(21) 6134-6143 (2022)

Carbon fiber composites inspection and defect characterization using active infrared thermography: numerical simulations and experimental results

Henrique Fernandes, Hai Zhang, Alisson Figueiredo, Clemente Ibarra-Castanedo, Gilmar Guimarares, and Xavier Maldague
Appl. Opt. 55(34) D46-D53 (2016)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (12)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (2)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (4)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved