Re: New spectral tool
Re: New spectral tool
- Subject: Re: New spectral tool
- From: Graeme Gill <email@hidden>
- Date: Sun, 01 Mar 2009 12:24:37 +1100
Roger wrote:
Is that already supported in Argyll?
Hi Roger, yes it is.
To be fair, I'm not convinced of its value (maybe Robin's implementation
has overcome some of the problems ?), since the resulting transparency
values seemed to have poor correspondence with other instruments
(ie. DTP41T, SpectroScanT). But then I'm not sure there is good correspondence
between the other instruments either :-)
My suspicion is that geometric effects (the direction the light from
the backlight is being emitted, and the acceptance angle of the the
instrument sensor) as well as the nature of the sample (whether it
diffuses or not) can have a dramatic effect on the readings.
Using a typical backlight that diffuses the light, the readings with
an Eye-One will be closest to Diffuse/Normal geometry total transmittance
(since the regular normal/normal transmittance is not excluded).
Other instruments may have different acceptance angles or illumination
types, and therefore explain the discrepancies.
Something that I suspect is unique to Argyll, is the ability
to read transparency strips with the EyeOne Pro.
cheers,
Graeme Gill.
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