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Proceedings Paper

Minimum radiation temperature difference and detection limit of flaws by means of an infrared radiometer
Author(s): Arao Kamoi; Yoshizo Okamoto; Osamu Makishi
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Paper Abstract

The infrared detection method has been carried out to detect the invisible flaw existing in a medium by observing a transient phase difference of a radiation temperature difference of deterioration parts and invisible flaws using the infrared radiometer. In order to evaluate the detection limit of the flaw using the infrared radiometer, it is important to confirm resolution characteristics of the radiometer like noise equivalent temperature difference NETD, minimum detectable temperature difference MDTD and minimum resolvable temperature difference MRTD under jurisdiction of ASTM, JIS and so on. However, the detection limit of the flaw displayed in the CRT of the radiometer is determined by the function of those values and surface radiation characteristics like emissivity, reflectivity and their spatial variance of the material and flaws used. The paper represents experimental and numerical results on the relation between the detection limit of the flaw and resolution characteristics of the radiometer itself.

Paper Details

Date Published: 19 March 1999
PDF: 8 pages
Proc. SPIE 3700, Thermosense XXI, (19 March 1999); doi: 10.1117/12.342325
Show Author Affiliations
Arao Kamoi, Univ. of East Asia/Shimonoseki (Japan)
Yoshizo Okamoto, Univ. of East Asia/Shimonoseki (Japan)
Osamu Makishi, Univ. of East Asia/Shimonoseki (Japan)


Published in SPIE Proceedings Vol. 3700:
Thermosense XXI
Dennis H. LeMieux; John R. Snell, Editor(s)

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