Re: dtp70 is dead
Re: dtp70 is dead
- Subject: Re: dtp70 is dead
- From: Roger Breton <email@hidden>
- Date: Sat, 03 Mar 2007 13:40:22 -0500
Klaus,
Thank's for your most informative reply.
> http://www.gretagmacbeth.com/downloads/i1_isis_brochure-en.pdf :
> "In a single chart measurement cycle you can read both UV-cut and
> measurements with no filter."
I was under the impression that the instrument required an extra piece of
optics to be installed by the manufacturer to allow UV-filtered
measurements. That takes care of that.
> http://en.wikipedia.org/wiki/LED#Ultraviolet.2C_Blue_and_white_LEDs :
> "If the active quantum well layers are GaN [...] the device will emit
> near-ultraviolet light with wavelengths around 350-370 nm."
Which begs the question; exactly which LEDs are used in the iSis?
> http://en.wikipedia.org/wiki/Aluminum_gallium_nitride :
> "AlGaN is used to manufacture light-emitting diodes operating in blue to
> ultraviolet region, where wavelengths down to 250 nm (far UV) were
> achieved."
Wow. I didn't know.
> Regards, Klaus
Roger Breton | Laval, Canada | email@hidden
http://pages.infinit.net/graxx
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