[argyllcms] Re: DIY reflective spectro
- From: "Roberto Michelena" <colorsync@xxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Thu, 9 Mar 2006 13:17:57 -0500
> Well, now you've got me wondering whether a flatbed scanner could be
> repurposed with a few modifications.
>
> Just thinking out loud, suppose the lamp were masked such that only a
> small aperture were illuminated, and prismatic element of some kind were
> arranged such that the reflected image were split, with the resulting
> spectrum being cast across the CCD. With the right software and
> calibration, this would provide instant strip-reading capability.
This is a damn good idea!!!!
It would seem easier for transmissive (like backlit prints), since you
wouldn't have to play with the geometry.
Just mask the light source on the lid so that it illuminates only the
patch width or less (we don't want flare from neighbouring patches).
The hard part would be to place a diffraction grating between the
bottom glass and the lens; there's no place, and also where would the
focus point be?
Maybe by building a glass platform on top of the scanner bed, raised
15cm or so... with the diffraction grating just below such platform,
and projecting onto the scanner's glass bed...
quite interesting, indeed, but absolutely draft of course.
-- Roberto Michelena
Infinitek
Lima, Peru
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