[argyllcms] Re: DIY reflective spectro

Alastair M. Robinson wrote:

Well, now you've got me wondering whether a flatbed scanner could be repurposed with a few modifications.

Just thinking out loud, suppose the lamp were masked such that only a small aperture were illuminated, and prismatic element of some kind were arranged such that the reflected image were split, with the resulting spectrum being cast across the CCD. With the right software and calibration, this would provide instant strip-reading capability.

Optics is *definitely* not my strong point, though - does this sound even remotely feasible?

Hmm I'm afraid you're dreaming. To begin with the weakest point in flatbed scanners: the cold cathode lamp. Very spiky spectrum, you're not going to go very far. This is why I got better results using a digital camera as a poor man's colorimeter than a flatbed scanner.

Even if you were able to adapt the optical path and add a diffraction grating or a prism, you would need some relatively accurate mechanics to be able to *replicate* the angle of the prism/grating.

Btw. the optical parts are from http://www.astromedia.de/ Sorry Graeme!

Stephan.

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