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15 March 2002 Relationship between MRTD and MDTD of infrared radiometer by use of FLIR collimator
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As one of NDE' means, infrared radiometer (IR) has become widely used in a variety of industries. This IR method is very useful for its customers to detect invisible surface and internal flaws of material. However, there are a few standards being necessary to evaluate detection limit of the above material flaws. The IR test method for detecting the size and location of the invisible flaws has been qualitatively carried out by applying some standards, but it has become non-quantitative and inaccurate for evaluating the relation between the detection limit of the invisible flaws and detectable and resolvable characteristics of IR. Conventional IR makers are accustomed to use NETD as the resolution characteristics of IR camera, but general customers using IR camera cannot evaluate the minimum detectable size of measuring object, if they cannot evaluate MRTD and MDTD. The study of the quantitative evaluation to clarify the relationship between MRTD and MDTD is very little. This paper represents evaluating method of MDTD compared to MRTD, and their quantitative relationship by using collimator FLIR testing.
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Arao Kamoi, Tetsuya Kondo, and Yoshizo Okamoto "Relationship between MRTD and MDTD of infrared radiometer by use of FLIR collimator", Proc. SPIE 4710, Thermosense XXIV, (15 March 2002);

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