03-21-2022, 04:28 PM
(03-21-2022, 02:16 PM)solid Wrote: You need at least 2 filters and a callibration procedure in order to determine the temperature. A nice idea of an experiment. I should try it with my interference filters.
Thank you!
The light sensor should pick up the light from the light bulb nicely as soon as it starts to glow, and, therefore, you could maybe "force" it to just measure intensity of one wavelength ±5 nm (as the red filter I found does). Before "glow temepratures" you'd have to rely on the infra red camera.
The intensity of that wavelength could then perhaps be used to find the temperature of the tungsten filament, even if the λ-max at each temperature will become shorter as temperature increases (Wien's law).
As you'd have U*I for every light sensor value (and at low temperatures for every heat camera measurement) it should be possible to figure out the area of the emitting tungsten filament, no?
Sorry, no measurements yet, just thinking loud...
Best regards.
//Erik