[argyllcms] R: Re: Read the powerful ambient light

  • From: "manold@xxxxxxxxxx" <manold@xxxxxxxxxx>
  • To: <argyllcms@xxxxxxxxxxxxx>
  • Date: Mon, 9 Aug 2010 14:28:33 +0200 (CEST)

What is adaptive mode in few words?

In the docs I found only:"This may 
give better accuracy for low level measurements, but may be more 
inconsistent overall due to the varying integration times. Overall 
measurement time will probably be longer."

Can I demage the instrument 
pointing it at the sun?

Thank you
Marco

----Messaggio originale----

Da: graeme@xxxxxxxxxxxxx
Data: 09/08/2010 10.43
A: <argyllcms@freelists.
org>
Ogg: [argyllcms] Re: Read the powerful ambient light


manold@xxxxxxxxxx wrote:
> The Eye One can read ambient up to 300 
cd/2m. Is it possible in some 
> way to read stronger light? For 
example, is it possible to read the 
> light reflected from a piece of 
paper and with the spectral values of 
> both paper and reflected light 
come to illuminant spectral power?

Possibly, if all you are interested 
in is the spectrum rather than
the absolute power level. Without 
calibrating for it, white polystyrene
foam or Tyvek makes a reasonably 
spectrally flat reflector. Use spotread -S -H
to see how flat it is. I 
think the Eye One can go higher than 300 cd/m^2 in
adaptive mode though 
(If I point my i1 at my fluorescent desk lamp, I get
20000 cd/m^2 with 
spotread -e). I wouldn't point it at the sun though :-)

Graeme Gill.







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