Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "John Moody"
<moodymz3@...> wrote:
>
> It has been reported that the spectro in the Z uses LEDs for
illumination.
> Does that represent a cost advantage alone, or confirm that LEDs are at
> least as good as the tungsten source for making profiles?
> Does anyone know how may LED colors are used in the new Z?
> 
> Best regards,
> John Moody
> 


The new Gretag iSIS XY scanner uses LEDs for the light source. As far
as I can tell, the advantages are basically repeatability and
longevity. LEDs do not age the same as a light bulb, so there should
be a longer period between recertifications. It should also hold its
calibration better too. The one report I've read (I think it was from
Andrew Rodney) said it was a continous white light source (I'm not
entirely sure on this one so don't hold me to it). I fairly certain
that this light source will end up in just about every new product
(assuming that it really works as well as conventional light bulbs).
Another advantage might be less electrical power needed per lumen of
light output. This would make the battery powered devices last longer,
or use smaller batteries, or add things like wireless connection to
your computer.