Glossary; Figure 15.1 Glossary Of Common Infrared Terms & Expressions - FLIR ThermaCAM P20 Operator's Manual

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Glossary

Figure 15.1 Glossary of common infrared terms & expressions
Term or expression
absorption (absorption factor)
ambient
atmosphere
autoadjust
autopalette
blackbody
blackbody radiator
calculated atmospheric transmis-
sion
cavity radiator
color temperature
conduction
continuous adjust
convection
difference temperature
dual isotherm
emissivity (emissivity factor)
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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 cor-
rection.
The IR image is shown with an uneven spread of colors, dis-
playing 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 accord-
ing to the image content.
The process that makes hot air or liquid rise.
A value which is the result of a subtraction between two
temperature 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.
Publ. No. 1 557 536 Rev. a35 – ENGLISH (EN) – January 20, 2004