Wuhan Guide IR136 Manuel d'utilisateur télécharger pdf (Page 77)

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

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Limiting Resolution

The highest spatial frequency which a system can resolve, regardless of target temperature. Ultimately the

spatial performance end of the MRT curve. Usually expressed in mill radians.

Line Scan

An instrument scanning and display mode which scans in one direction only but displays those lines side-

by-side in the perpendicular direction to create a two-dimensional thermal map of a scene over time or

panning motion.

Linear

Of, pertaining to or formed by a set of straight lines.

Linear Array

A collection of active detector elements set in a straight line on a plane usually spaced equal distances

apart from each other with a single element in the perpendicular direction.

Low-Pass Filter

A filter blocked at higher wavelengths, with a cutoff wavelength in the pass band of the detector that passes

all wavelengths shorter than the cutoff wavelength.

Lumen

An SI unit for measuring radiant flux. One lumen is produced per solid angle by a point source with one

candela intensity.

Luminance

The portion of a color display which is related to display intensity; how bright a color is perceived by the

eye.

Melting point

The temperature at which a material converts from a solid to a liquid.

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Wuhan Guide IR136 Manuel d'utilisateur Page 77