FLIR Photon Manual Book page 47

image correction (internal or external).
A way of compensating for sensitivity
differences in various parts of live images
and also of stabilizing the camera.
infrared. Non-visible radiation, with a
wavelength from about 2–13 µm.
IR. Infrared.
isotherm. A function highlighting those
parts of an image that fall above, below,
or between one or more temperature
intervals.
isothermal cavity. A bottle-shaped
radiator with a uniform temperature
viewed through the bottleneck.
Laser LocatIR. An electrically powered
light source on the camera that emits
laser radiation in a thin, concentrated
beam to point at certain parts of the
object in front of the camera.
laser pointer. An electrically powered
light source on the camera that emits
laser radiation in a thin, concentrated
beam to point at certain parts of the
object in front of the camera.
level. The center value of the
temperature scale, usually expressed as a
signal value.
manual adjust. A way to adjust the
image by manually changing certain
parameters.
NETD. Noise equivalent temperature
difference: A measure of the image noise
level of an IR camera.
noise. Undesired small disturbance in the
infrared image.
object parameters. 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 signal. A non-calibrated value
related to the amount of radiation
received by the camera from the object.
palette. The set of colors used to display
an IR image.
pixel. A picture element. One single spot
in an image.
radiance. Amount of energy emitted
from an object per unit of time, area, and
angle (W/m /sr).
2
radiant power. Amount of energy
emitted from an object per unit of
time (W).
radiation. The process by which
electromagnetic energy is emitted by
an object or a gas.
radiator. A piece of IR radiating
equipment.
range. The current overall temperature
measurement limitation of an IR camera.
Cameras can have several ranges,
which are expressed as two blackbody
temperatures that limit the current
calibration.
reference temperature. A temperature
which the ordinary measured values can
be compared with.
reflection. The amount of radiation
reflected by an object relative to the
received radiation. A number between
0 and 1.
Glossary
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