Wuhan Guide IR136 Manual de usuario descargar pdf (Pagina 73)

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

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Geometric Concentration

The ability of a lens to concentrate radiation on the focal point; the ratio of aperture size to active detector

area.

Graybody

A thermal reference source which maintains an output, not at 100% emission (which would be a blackbody)

but at a lesser ratio. Graybody emissions maintain a constant emission ratio over a wide frequency range.

This distinguishes them from spectral radiators.

Gray Scale

An area of the screen reserved for displaying an increasing ramp of image intensities to be used as a

calibration aid. Periodic intensity levels are labeled with the temperature or radiation value they represent.

Heat

Thermal energy.

Heat Capacity

A measurement of an objects ability to store thermal energy. Heat capacity equals the specific heat of an

object multiplied by its density multiplied by its size (or specific heat times mass).

Heatsink

A device for dissipating heat; it absorbs heat by conduction from heat producing devices and dissipates

heat by means of convection.

Heat Transfer

The flow of thermal energy from one object to another.(By means of conduction, convection or radiation).

Hertz(Hz)

A unit for measuring frequency. One hertz is one cycle per second.

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Wuhan Guide IR136 Manual de usuario Pagina 73