[argyllcms] Re: reflective measurement: underlayment plate
- From: Graeme Gill <graeme@xxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Wed, 19 Nov 2014 08:01:08 +1100
Ben Goren wrote:
> Any normal ambient lighting is going to be fine. There're so many stops
> difference
> between what negligible amount might leak past the bottom and the
> instrument's own
> illuminant that you're not going to be able to measure the difference --
> it'll be
> dwarfed by sensor / electronics noise and temperature drifts and the like.
> Don't shine
> a really bright light directly at the base as you tip the instrument and
> you'll be
> fine.
Actually, most of this is calibrated out. Before each measurement, a black
calibration
is performed, so any stray light will get subtracted out.
Graeme Gill.
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