ExplanationTerm or expression
The center value of the temperature scale, usually
expressed as a signal value.
level
A way to adjust the image by manually changing
certain parameters.
manual adjust
Noise equivalent temperature difference. A mea-
sure of the image noise level of an IR camera.
NETD
Undesired small disturbance in the infrared imagenoise
A set of values describing the circumstances under
which the measurement of an object was made,
and the object itself. (such as emissivity, ambient
temperature, distance etc.)
object parameters
A non-calibrated value related to the amount of
radiation received by the camera from the object.
object signal
The set of colors used to display an IR image.palette
Stands for picture element. One single spot in an
image.
pixel
Amount of energy emitted from an object per unit
of time, area and angle (W/m
2
/sr)
radiance
Amount of energy emitted from an object per unit
of time (W)
radiant power
The process by which electromagnetic energy is
emitted by an object or a gas.
radiation
A piece of IR radiating equipment.radiator
The current overall temperature measurement
limitation of an IR camera. Cameras can have
several ranges. Expressed as two blackbody tem-
peratures that limit the current calibration.
range
A temperature which the ordinary measured values
can be compared with.
reference temperature
The amount of radiation reflected by an object
relative to the received radiation. A number be-
tween 0 and 1.
reflection
Percentage of water in the air, relative to what is
physically possible. Air temperature dependent.
relative humidity
15
Publ. No. 1558407 Rev. a155 – ENGLISH (EN) – February 6, 2006 107
15 – Glossary
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