Spectrocam: standard versus UV?
Spectrocam: standard versus UV?
- Subject: Spectrocam: standard versus UV?
- From: Paul Schilliger <email@hidden>
- Date: Sat, 01 Sep 2001 11:48:21 +0200
Thanks for everyone's input on my previous questions about ProfilerPro,
and the RGB versus CMYK calibration of RGB printers. Your answers have
brought me clarification and helped in my choice.
I am now trying to decide between two versions of the SpectroCam. Udo J.
Machiels suggested to me that the UV version might be a good choice if I
use pigmented inks and the Epson 2000P. Now, I am still unsure whether
I'll keep this printer and go for a CIS, or abandon the pigmented inks
and stay with dye inks and the 1290 Epson printer. All depends on how
the metamerism issue will be improved and I am following the discussions
over this issue.
Here is what the technical support of Spectrostar sent me on the UV
versus non-UV versions of their Spectrocam. My question is: will I be
missing some capabilities of the standard version if I choose the UV
version, and are they any cons with that choice that I am not aware of?
"The Standard SC will read 380-750 NM
The UV SC will read also 380-750 NM (visible spectrum) except the UV
part
between 380 and 400
We are using a different illuminator (plastics) to accomplish the UV
filter
effect.
We would like to clear up a misconception that some people have about
fluorescence. It is not only caused by ultraviolet radiation.
Fluorescence
can also be initiated by light in the visible spectrum.
Simply taking UV filtered and non-filtered readings can detect paper
whiteners and other UV based fluorescence; but a bi-spectral
spectrophotometer (which measures both output and response at each
segment of
the spectrum) is required to check for visible range fluorescence. Using
this
type of spectro is incredibly slow, and the devices are very expensive.
So we
typically restrict ourselves, on a practical basis, to checking for
whiteners, and let the big labs determine what inks and dyes are
fluorescent.
With the UV version we still measure the Spectrum but there will be
no UV part in the exposure so we will not create fluorescence because
part of the fluorescence is created by the view able blue light"
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E: email@hidden
Tel: + 31 (0) 65 373 6908 Fax: + 31 (0) 20 615 1717
Personal fax: + 31 (0) 20 615 1717
http://www.spectrostar.com
Helicopterstraat 25, 1059CE, Amsterdam, The Netherlands
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end quote.
Again, thanks for your help!
Paul Schilliger
photography
email@hidden