Re: backlight for transmissive profile patch reading with i1Pro3 plus
Re: backlight for transmissive profile patch reading with i1Pro3 plus
- Subject: Re: backlight for transmissive profile patch reading with i1Pro3 plus
- From: Scott Martin via colorsync-users <email@hidden>
- Date: Tue, 12 Sep 2023 07:43:04 -0500
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Hey Peter. You are smart to make sure the light tables are broad spectrum and
preferably relative neutral in color. i1Profiler can BS data that’s not there
but its best to feed it real data to begin with.
Of course, XRIte’s whole thinking here was that people would be using all kinds
of light tables, including some that are quite terrible with dark spots, etc.
The way i1Profiler measures every single patch location and compensates for the
light tables peculiarities is just brilliant, and works extremely well. The
table can be yellow or blue and the software will compensate for this. Of
course the proof is in the pudding. Make final evaluation prints and let them
speak for themselves. I’ve made profiles on a variety of light tables trying to
see different results to no avail. i1Profiler compensates beautifully every
time, from my experience.
XRite has quietly been recommending this inexpensive light table:
https://amzn.to/3LHSmrZ
I don’t have the measurements on me where I am this week but could work towards
getting a SprctraShop measurement for you when I return. It’s not blue, it’s
bright and pretty consistent, and the results are the same as when I use my
Just Normlicht Lightbox. FWIW.
Scott Martin
www.on-sight.com <http://www.on-sight.com/>
Imaging Science for Art
> On Sep 12, 2023, at 1:00 AM, Peter Miles via colorsync-users
> <email@hidden> wrote:
>
> I have been looking for a backlight for reading transmissive profiling
> patches with an i1Pro3 plus.
>
> I have not been able to find much in the way of recommendations in the web
> searches I’ve done.
>
> And in my country, there are not many stores that stock them.
>
>
>
> I have found two LED backlight pads that I’ve been able to inspect. A Kaiser
> slimlite plano and an Autograph A920 LX.
>
> I took some measurements with a spectrometer and SpectraShop software.
>
> Both backlights are broad spectrum. So that is good.
>
> However, I am concerned about the blue light output.
>
> One has no blue light output between 400 and 420nm and very low blue output
> till about 440nm.
>
> The other is a little better, but still with little or no light output
> between 400 and 430nm.
>
> Both have light output at just over 1000 lux.
>
>
>
> Question.
>
> I’m guessing that the no/low blue light is not good? Or does that not really
> matter?
>
> Is the no/low blue light output just the nature of white LED backlights?
>
> Can anyone recommend or use a particular brand and model of backlight for
> i1Pro3 Plus?
>
>
>
> Your help appreciated as always
>
>
>
> Thanks
>
> Peter Miles
>
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