Re: Portable Spectrophotometers
Re: Portable Spectrophotometers
- Subject: Re: Portable Spectrophotometers
- From: Henrik Holmegaard <email@hidden>
- Date: Wed, 6 Feb 2002 08:09:28 +0100
Andrew Rodney <email@hidden> wrote:
Nice thing about the EyeOne with ProfileMaker is you can do output profiles
AND displays. It's also able to do spot measurements. It's way cool!
"Way cool ...", that's a new idiom to remember -:).
The i1 is a spot reading (: emission and reflection) and strip
scanning (: reflection) spectrophotometer. It has a largish aperture
of 4.5 mm to integrate more dots and in reflection mode it samples
each patch multiple times as it travels. In other words it averages
across the patch. So it is possible to first build a profile and then
apply colorimetric process control say using the FOGRA CMYK test
chart.
Without a spot reading spectrophotometer an ICC workflow doesn't get
off the ground. If the spot reading spectrophotometer doubles as
strip reading spectrophotometer, then so much the better.
But the safest solution is an x-y autoscanning spectrophotometer.
Instruments of this type are usually big as a house and about as
bulky, except for the iCColor which is a handy little reflection
autoscanning instrument where the chart is fed into the front feeder
slot and exits out the front exit slot for a minimal desktop
footprint. The iCColor is not a strip reader that measures one column
at a time, but a chart reader that measures multiple columns at a
time. It averages readings across each patch the same as the i1.
Because the iCColor knows the x-y position of each patch, it cannot
read across columns which results in sampling neighbouring patches on
the left or right as a strip scanning instrument might. The
calibration tile is built in and calibration is launched on every
measurement ... you can't loose or switch the calibration tile and
you can't forget to calibrate.