Posted by Fred Perry I do not have an easy answer on radiant energy but it is omnidirectional and can be computed as a grey-body emmitter with emissivity of abouit 80%. - Fred Perry
on December 29, 2005, 8:51:57, in reply to "regarding IR source"
71.243.113.3
The answer is YES, these can be used in analytical instruments. However, in the 1.7 to 3.9 micron region you can probably buy a tungsten filament lamp with a glass, or better, quartz envelope that will be (A) cheaper and (B) brighter. Our thermal sources like the IR-12s become the devices of choice at wavelengths beyond 4 or 4.5 microns where tungsten lamp jackets stop transmitting.
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