Globar

The term refers to an existing silicon carbide globar radiation source for the mid-and far -infrared range.

Construction and application

The Globar emits an electrically heated to 980 to 1650 degrees Celsius silicon rod of about 5-8 mm wide and 20-50 mm in length with a downstream variable interference filter the radiation from 4 to 15 microns wavelength.

Globare be used in infrared spectroscopy as thermal light sources because their spectral behavior corresponds approximately to that of a Planckian radiator ( or blackbody ). Alternative light sources in the mid-infrared are Nernststifte, coils made ​​of chrome -nickel alloys or high-pressure mercury lamps.

Name

The artificial word Globar derives from Old English and is based on the contraction of the two words "glow " (Eng. " glow" ) and "bar " (Eng. " bar "); so it is also a portmanteau word. In English-speaking, therefore, is often the (wrong ) spelling " glowbar " is used, which seems logical in terms of language.

The American Resistor Company in Milwaukee, Wisconsin, was the word and the lettering Globar ( in a cursive font ) in the United States Patent and Trademark Office on June 30, 1925, the registration number 200201 and on 18 October 1927, no. 234147 registered as a trademark.