Wuhan Guide IR136 Uživatelský manuál stáhnout pdf (Strana 75)

Thermografie in der Theorie und Praxis (INTERNET: www.irPOD.net / e-MAIL: [email protected] ) © Bernd Schindel 2007

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Incident Radiant Energy

Total energy impinging on a surface from the surroundings.

Infiltration

The movement of air into a building structure. Along with exfiltration of hot interior air, infiltration of cold

exterior air can be the principal heat loss mechanism in a structure.

Infrared (IR)

Electromagnetic radiation which occupies the band from 0.7 microns to 100 microns. Infrared radiation is

between the visible spectrum and microwave radiation.

Infrared Film

Photographic media which can image radiation in the SWIR band from about 0.7 microns to 1.1 microns.

Infrared-window

An optical element usually placed on the front of an infrared system that is transparent to infrared radiation

but excludes radiation of other wavelengths and protects the internal sensor components.

Instantaneous Field Of View (IFOV)

The angle in mill radians derived by dividing the active detector element's size by the system's effective

focal length. An effective figure of merit for system resolution can be derived by dividing the field of view by

the instantaneous field of view.

Insulation

A material to reduce heat transfer by conduction. A good insulator has a large R-value and a large thermal

resistance; a low thermal conductivity.

Interlace

A technique used in visual displays to produce high resolution images at update rates slower than the eye

flicker frequency. With interlace, a fraction of the total frame lines (called a field) is displayed at multiples of

the frame rate. These lines are spread out across the entire display area and with each field update, a

different set of lines are displayed. The number of fields required to reconstruct the entire frame is the

interlace factor. The lines are usually spaced apart by the interlace factor. Normal television is interlaced by

a factor of two fields per frame.

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Wuhan Guide IR136 Uživatelský manuál Strana 75