Infrared reflectance of metallic objects coated with a class of varnishes or absorbing pigments

Stamatios A. Amanatiadis; Georgios K. Apostolidis; Georgios T. Karagiannis

doi:10.1117/12.2325777

9 October 2018 Infrared reflectance of metallic objects coated with a class of varnishes or absorbing pigments

Stamatios A. Amanatiadis, Georgios K. Apostolidis, Georgios T. Karagiannis

Proceedings Volume 10795, Electro-Optical and Infrared Systems: Technology and Applications XV; 107950R (2018) https://doi.org/10.1117/12.2325777
Event: SPIE Security + Defence, 2018, Berlin, Germany

Abstract

The accurate and non-destructive estimation of the properties of coatings on metals via infrared spectroscopy is investigated in the present paper in order to inspect the traceability of the metals. First of all, the class of homogeneous coatings such as varnishes is examined, focusing on the extraction of the electrical properties and thickness through simple spectroscopic measurements. The thickness extraction originates from the multiple interferences that occur when an incident electromagnetic wave is reflected from a finite thickness layer via a procedure known as InfraRed Interference Method. The theoretical analysis is realized via the combination of fundamental electromagnetic and transmission line theories, while several measurements at the infrared region are conducted on varnishes with different electrical properties and thicknesses atop metals, in order to facilitate the accuracy of the proposed method. Moreover, the analysis is extended towards inhomogeneous materials such as highly absorbable pigments that are utilized to decrease efficiently the radar cross section of aircrafts. The Kubelka-Munk theory is utilized to estimate the scattering and absorbing properties of such materials. Additionally, various measurements and simulations are conducted on samples of different thicknesses to determine the penetration depth of infrared light and estimate the absorbing efficiency.

Conference Presentation

Citation Download Citation

Stamatios A. Amanatiadis, Georgios K. Apostolidis, and Georgios T. Karagiannis "Infrared reflectance of metallic objects coated with a class of varnishes or absorbing pigments", Proc. SPIE 10795, Electro-Optical and Infrared Systems: Technology and Applications XV, 107950R (9 October 2018); https://doi.org/10.1117/12.2325777

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available