Re: Sunlight
Re: Sunlight
- Subject: Re: Sunlight
- From: Roger Breton <email@hidden>
- Date: Tue, 20 Nov 2007 07:34:08 -0500
Dear Clemens and Michael,
Maybe good old Wisjeky & Stiles's Color science has a section on the D
series illuminant? I'll take a look. But what I can remember, it was based
on real 'daylight' data collected in northern hemisphere latitudes and
massaged statistically to yield some coefficients with which the whole
series of Dxx illuminant SPD could be generated. In CIE 15.2 there is a
mention on some report having to do with the D series presented by Wisjeck
in the early 60's to the CIE. Maybe that's when the development of the D
series traces back to that time?
> it is long ago, that I was reading about D50, D65 and so on.
> But if I remember it correctly, D50 und D65 were never measured from
> real sunlight.
>
> They are standards based on a "technical daylight reproduction".
> The best they technicaly could get at that time.
>
> Tom Lianza is allways a very good source for questions like this.
> Maybe he can jump into the thread.
>
> Best regards,
> Clemens Beisch
>
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>
Roger Breton
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| | >Re: Sunlight (From: Beisch Clemens <email@hidden>) |