Re: dtp70 is dead
Re: dtp70 is dead
- Subject: Re: dtp70 is dead
- From: Klaus Karcher <email@hidden>
- Date: Sat, 03 Mar 2007 19:14:51 +0100
Roger Breton wrote:
the fact that the LED illumination is limited to
the visible range, we should not see any UV-induced fluorescence in
measurements.
If this proves to be the case then this, to me, is the same as filtering
reflected light with a UV filter on non-LED instruments.
I think it doesn't prove to be the case:
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."
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."
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."
Regards, Klaus
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Colorsync-users mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden