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Significance and Use
5.1 This practice relates to a thermal imaging system's effectiveness for discerning details in a scene.
5.2 MRTD values provide estimates of resolution capability and may be used to compare one system with another. (Lower MRTD values indicate better resolution.)
5.3 Due to the partially subjective nature of the procedure, repeatability and reproducibility are apt to be poor and MRTD differences less than 0.2°C are considered to be insignificant.
Note 1: Values obtained under idealized laboratory conditions may or may not correlate directly with service performance.
1.1 This practice covers the determination of the minimum resolvable temperature difference (MRTD) capability of the compound observer-thermal imaging system as a function of spatial frequency.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
E1316 Terminology for Nondestructive Examinations
ICS Number Code 17.180.20 (Colours and measurement of light)
ASTM E1213-14, Standard Practice for Minimum Resolvable Temperature Difference for Thermal Imaging Systems, ASTM International, West Conshohocken, PA, 2014, www.astm.orgBack to Top