filament temperature
filament temperature
(OP)
I am looking for an easy to use and cheap method, or equipment, allowing to measure filament temperature in operating incandescent lamps (tungsten filaments). High accuracy in not requested; plus minus 100ยบ celsius uncertainty is allowed.
Julian





RE: filament temperature
You can measure the ratio of cold resistance to hot
resistance.
Better would be filter out two colors (e.g. blue/red )
and measure their ratio.
Wjy do you need it ? perhaps there is an other way...
<nbucska@pcperipherals.com>
RE: filament temperature
RE: filament temperature
What was the setup with the two Bragg gratings used to get the filament temperature?
RE: filament temperature
If it's a standard incandescent bulb, a diffraction grating gets you the spectrum, but you'll need the relative spectral output at each wavelength, which is what allows you to figure out the color temperature.
What is the specific need, e.g., what is the applicability of the information?
Are you looking for color temperature? Color temperatures of typical incandescent bulbs are all considerably lower than something like the 2856 K bulb used in high performance electro-optical testing.
TTFN
RE: filament temperature
It seems to be a very dificult objective, so any other suggestion will be appreciated.
Julian
RE: filament temperature
This type effect is used in a number of electrically calibrated optical power instruments.
TTFN
RE: filament temperature
a voltmeter, an ammmeter and a variable power supply
should be enough.
<nbucska@pcperipherals.com>
RE: filament temperature
Julian
RE: filament temperature
thanks in advance
lily