[argyllcms] Re: Can Eye-one Pro failure the calibration?
- From: Roger Breton <graxx@xxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Mon, 04 Oct 2010 20:23:47 -0400
Calibration in emissive mode uses dark current. But if dark current changes
after calibration, before heat changes the sensitivity of the detector, then
the calibration is kaput.
/ Roger
From: argyllcms-bounce@xxxxxxxxxxxxx [mailto:argyllcms-bounce@xxxxxxxxxxxxx]
On Behalf Of Marco N.
Sent: 4 octobre 2010 03:33
To: argyllcms@xxxxxxxxxxxxx
Subject: [argyllcms] Re: Can Eye-one Pro failure the calibration?
Il giorno 03/ott/2010, alle ore 23.06, Roger Breton ha scritto:
Did you leave the EyeOnePro attached to the monitor for ONE hour before
making the measurements?
Because of thermochrism effects (EyeOnePro's don't have Peltier-cooled CCD
like more expensive spectroradiometers), their response when measuring at
the edge of their sensitivity threshold are heavily influenced by their
internal temperature I am told. Leaving them on the monitor for ONE hour
before helps minimize this effect.
/ Roger
Maybe I misunderstood, but the lack of a cooling system should cause the
drift of the instrument calibration (observable in the change of the
measurements of black) and not in the measurement of the black immediately
after the calibration of the instrument. I misunderstood?
Thank you
Marco
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