Glossary
18
span
The interval of the temperature scale, usually expressed as a signal
value.
spectral (radi-
ant) emittance
Amount of energy emitted from an object per unit of time, area and
wavelength (W/m
2
/μm)
temperature
difference, or
difference of
temperature.
A value which is the result of a subtraction between two temperature
values.
temperature
range
The current overall temperature measurement limitation of an IR
camera. Cameras can have several ranges. Expressed as two
blackbody temperatures that limit the current calibration.
temperature
scale
The way in which an IR image currently is displayed. Expressed as
two temperature values limiting the colors.
thermogram infrared image
transmission
(or transmit-
tance) factor
Gases and materials can be more or less transparent. Transmission
is the amount of IR radiation passing through them. A number be-
tween 0 and 1.
transparent
isotherm
An isotherm showing a linear spread of colors, instead of covering
the highlighted parts of the image.
visual Refers to the video mode of a IR camera, as opposed to the normal,
thermographic mode. When a camera is in video mode it captures
ordinary video images, while thermographic images are captured
when the camera is in IR mode.
#T559498; r.22370/22370; en-US
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