[argyllcms] Re: fwa compensation unexpected results

On 8 May 2006 at 21:53, Roger Breton wrote:

> purchase in North America. I would be tempted by the Tristan system. But, if
> I remember, they did not made a model with as wide a wavelength range as the
> OceanOptics. I am refering to a model that goes from 250nm to 850nm, really

M.u.t. (Newport in the US?) mainly seems to sell the Tristan devices 
to chemical labs. Here a UV/VIS setup with <350nm is rather common.  
I agree, the price for a new device isn't really much better than 
Ocean Optics. But if it comes along cheaply on EBay or labx.com...

I am also building a spectrometer based on standard components. It 
should be flexible and fill the quality gap between current devices 
like Spectro 100xy/SpectroEye/Minolta and lab grade and still stay 
"affordable" (1500 - 5000 Euro). The "DIY reflective spectro" 
discussion is interesting here, but not the type of device I am 
looking for.

If others are willing to join, I would like to make this an open 
source project. As said, my biggest problem currently is getting a 
good 45/0 probe. I am not an expert in all fields and thus help is 
welcomed (straylight-, wavelength-, bandpass-correction,...). I 
thought about using the optics of existing devices like Graeme 
mentioned, but I basicly want others to rebuild the device quickly 
without being an optics expert. So it should be plug-and-play. I am 
currently thinking about hiring an optics company making a small 
batch of probes, but I really would like to avoid it.

What about splitting the fibre and working with different filters so 
that one might be able to compute the influence of optical whiteners? 
Might also help in getting rid of 2nd order problems. I wonder about 
how big 2nd order and straylight problem get in practice with UV/VIS 
instead of VIS devices in Lab space.  Filters surely do not replace 
monochromators, but I guess they are better than nothing at a 
fraction of the cost. 

--
Wolf Faust                      Tel: +49-69-5486556
mailto:wfaust@xxxxxxxxx         Fax: +49-69-95409598
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