Without considering atmospheric transmittance and radiative transmission loss,
A. To the source point, the irradiance of the object at the source point is inversely proportional to the square of the distance. Although the radiation intensity of the source point does not change, the field angle between the source point and the thermal image becomes smaller as the distance between them increases. The figure below shows the relationship between the irradiance of the source point and the distance.
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Quanhom Technology Co., LTD is a company engaged in the area of development and production of thermal infrared optics. The high precision product range includes infrared lenses assemblies of SWIR/MWIR/LWIR , eyepieces, infrared lens elements, etc.
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How do the distance and angle affect the thermal imaging temperature measurement?
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How do the distance and angle affect the thermal imaging temperature measurement?
Thus, when the
distance increases, the measuring temperature will get lower.
A.
To
the plane source object, if there is no angle between the target light source
and the thermal imager at the same plane, and the radiation energy fills the
instantaneous field of view of the measurement system, the distance does not
influence the result of thermal imaging temperature measurement.
Quanhom Technology Co., LTD is a company engaged in the area of development and production of thermal infrared optics. The high precision product range includes infrared lenses assemblies of SWIR/MWIR/LWIR , eyepieces, infrared lens elements, etc.