Re: Sunlight -- footnote
Re: Sunlight -- footnote
- Subject: Re: Sunlight -- footnote
- From: Klaus Karcher <email@hidden>
- Date: Sun, 30 Dec 2007 02:06:04 +0100
Hi Roger,
you wrote:
Wow, John! Thank's so much for sharing this amount of detail on the genesis
of the D series of illuminants. I feel dismayed that so little attention was
paid by the original scientists to documenting the time of the day and
seasons of the year when the data was actually recorded, for the benefit of
future generation like us.
One thing that broke my heart as I was reading your account is the reference
to those scarce optical journals. I know the Munsell Lab in Rochester has
copies of everything that was ever published, scientifically, about color
and color metrology. But outside of this lab and a few other places in the
world, one in Japan, one or two in England and a few others scattered in
Europe, no one is seeing the need to reprint or at least publish in some
form some of those original priceless papers and journals for the benefit of
today's generation of color enthusiasts that want to access some of the more
fundamental texts in colorimetry.
you are right: it's a pity that they are not available. E.g. I was
looking for some publications from MacAdam and didn't find them.
Thank you so much for taking the time to contribute your knowledge and
information!
maybe I can contribute a little bit additional information:
CIE TC-66 is preparing a CIE recommendation on an Indoor Daylight
Illuminant. Some details can be foud in Janos D. Schanda's presentation:
<http://www.ps.bam.de/info07/SCHA07.PPT>
Furthermore there are some interesting papers from Raymond L. Lee:
<http://www.usna.edu/Users/oceano/raylee/RLL_cv.html>:
Color and spectral analysis of daylight in southern Europe
<http://www.usna.edu/Users/oceano/raylee/papers/RLee_JOSAA_daylight_paper.pdf>
Colorimetric and spectroradiometric characteristics of narrow
field-of-view clear skylight in Granada, Spain
<http://www.usna.edu/Users/oceano/raylee/papers/RLee_JOSAA_skylight_paper.pdf>
and
Calculating correlated color temperatures across the entire gamut of
daylight and skylight chromaticities
<http://www.usna.edu/Users/oceano/raylee/papers/RLee_AO_CCTpaper.pdf>
(I was very surprised about the huge range of variation: "Spectral
measurements of natural light at many sites worldwide show that CCT
varies between 3000 and approx. 10E6 K")
Klaus
P.S.: Prof. Schanda's presentation also contains the very deflating
results of a spectroradiometer comparison I mentioned recently, see
slide 37...45)
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Colorsync-users mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden