Abstract
The paper explains the effect of matrix resolution on the field of view of a single detector. The dependency of the field of view of a single detector as a function of distance between the lens of thermal imaging camera and the surface observed is shown. It was proposed how to select the lens of thermal imaging camera so that the obtained thermogram it would be able to achieve such a geometric resolution that would allow for sufficiently accurate mapping of temperature distribution on the surface observed.
Highlights
In the case of additional lens, the FOV values are given in angles or units of length as the length of the vertical or horizontal instantaneous field of view obtained while maintaining a specified work distance (WD) (Work Distance) between the lens and the observed surface
In order to facilitate the operation and selection, manufacturers of additional lens provide information on the IFOV value expressed in units of length, which can be obtained for a given matrix resolution while maintaining WD distance
Thermovision measurement of temperature of a small area requires obtaining a thermogram with adequate sharpness
Summary
In order to obtain reliable information on the temperature of the surface observed, it must be at least three times bigger than the field of view of a single IR detector of the thermal imaging camera used. The field of view of a single IR detector depends on the distance between the lens and the observed surface, and the angle of view of the detector.
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