Re: On the effect of florescence
Re: On the effect of florescence
- Subject: Re: On the effect of florescence
- From: Ray Maxwell <email@hidden>
- Date: Wed, 02 Mar 2005 18:01:55 -0800
Hi Armand,
The answer is not simple.
Check out this pdf document from X-Rite:
www.xrite.com/documents/
apps/public/whitepapers/Ca00002a.pdf
OR...Google "D50 spectrum xrite"
Ray
Armand Rosenberg wrote:
I approach
spectra as a physicist, not as a color scientist. So I have to ask:
doesn't a term like D50 or D65 etc. describe a spectral distribution
that correlates to a blackbody spectrum with a certain temperature BUT
ONLY in the visible spectrum? Does D50, D65 etc. tell you anything
about what happens to the spectrum of your source in spectral regions
outside the visible (such as UV and IR)?
I know what it means to have a 5000K or 6500K etc. "blackbody emitter"
(oops -- physics term!) -- that WOULD in principle specify the relative
emitted power as a function of wavelength for all wavelengths. My
question is whether the D50 or D65 etc. terminology implies any
information about the source's output OUTSIDE the visible spectrum.
That output matters since it can cause fluorescence in the visible,
hence altering colors, as you are discussing.
And while we're at it, can someone clarify the difference between D50
and 5000K (for example) as used by color scientists to describe light
sources?
I could probably google this, but since the experts are here
assembled...
Armand
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