Re: Optical pyrometers, was R = V/I ?

[Leigh Palmer <palmer@SFU.CA>]

At 3:57 PM -0700 5/8/00, Ludwik Kowalski wrote:
> I agree, a red filter makes sense.  Spontaneous ideas are often
> not good. Is it not true that a black body absorber whose
> temperature is measured objectively (rather than by matching
> colors subjectively) is also called a pyrometer? It can be calibrated
> to measure a very high temperature, for a given geometric setup.
> Or to measure the irradiance in W/m^2 (from which T can be
> calculated, if other parameters, such as distance, are known).
> Ludwik Kowalski

I don't understand. An optical pyrometer is used to measure temperature
objectively. "Pyrometer" merely means any instrument or device (slump
cones are also pyrometric devices) used to measure high temperatures.
A calorimetric radiometer is only one kind of pyrometer (usually called
a "bolometer").

Leigh