Glossary - FLIR ThermaCAM P45 User Manual

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Glossary

Term or expression
absorption (absorption factor)
ambient
atmosphere
autoadjust
autopalette
blackbody
blackbody radiator
calculated atmospheric transmission
cavity radiator
color temperature
conduction
continuous adjust
convection
difference temperature
dual isotherm
emissivity (emissivity factor)
emittance
Publ. No. 1557966 Rev. a155 – ENGLISH (EN) – February 6, 2006
Explanation
The amount of radiation absorbed by an object relative to the
received radiation. A number between 0 and 1.
Objects and gases that emit radiation towards the object being
measured.
The gases between the object being measured and the camera,
normally air.
A function making a camera perform an internal image correc-
tion.
The IR image is shown with an uneven spread of colors, display-
ing cold objects as well as hot ones at the same time.
Totally non-reflective object. All its radiation is due to its own
temperature.
An IR radiating equipment with blackbody properties used to
calibrate IR cameras.
A transmission value computed from the temperature, the relative
humidity of air and the distance to the object.
A bottle shaped radiator with an absorbing inside, viewed
through the bottleneck.
The temperature for which the color of a blackbody matches a
specific color.
The process that makes heat spread into a material.
A function that adjusts the image. The function works all the
time, continuously adjusting brightness and contrast according
to the image content.
The process that makes hot air or liquid rise.
A value which is the result of a subtraction between two temper-
ature values.
An isotherm with two color bands, instead of one.
The amount of radiation coming from an object, compared to
that of a blackbody. A number between 0 and 1.
Amount of energy emitted from an object per unit of time and
2
area (W/m )
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