D65 filter [was Re: ProfileMaker 5]
D65 filter [was Re: ProfileMaker 5]
- Subject: D65 filter [was Re: ProfileMaker 5]
- From: Roger Breton <email@hidden>
- Date: Tue, 15 Aug 2006 19:51:01 -0400
> I pulled out my measurements of the Spectrolino D65 filter and combined
> it with Illuminant A (spectrally shaped close to a tungsten-halogen
> bulb) and then compared it to CIE D50. The spectral result does not
> match D50. The basic shape of the spectrum from 380 to 600 nm is not
> too bad, but the filter produces a large wide peak from 620 to 730 nm
> which does not match the D50 illuminant spectrum. However, the CCT of
> the Illuminant A/D65 filter is 4624 K, which, assuming the Illuminant A
> is about 300 K below a true tungsten-halogen bulb would give a combined
> result of about 4924 K, should give a close CCT match to D50.
>
> Robin Myers
Care to post a graph showing your measurements, somewhere on your website?
I'm sure lots of people on the list would appreciate the insight, to begin
with yours truly ;-)
Roger Breton | Laval, Canada | email@hidden
http://pages.infinit.net/graxx
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