Two things, actually, if you're looking to save a few pennies. First, there's a lot of excellent published scholarly work on art-si.org about how to do multi-spectral imaging with a regular camera and one or more color filters. If you don't need very high spectral resolution, that may well do the trick. Also...you can probably build your own spectrophotometer to do the job, especially since you're not looking for a miniature piece of equipment. It could be as simple as a light source, a diffraction grating or prism, a box with a couple carefully-placed slits, a light source, and a cheap webcam. You'd take an image of the rainbow after it's bounced off the source and through the grating and compare the relative brightness of the different parts of the rainbow when bounced off a standard. You'd calibrate it by comparing it against measurements with your "real" instrument. And, one last thought: if this is just for a one-off deal, it might be easier to have somebody else do it.... Cheers, b& On Oct 11, 2013, at 10:11 AM, Roger Breton <graxx@videotron.ca> wrote:
Hello fellow ColorSyncers,
I require a large aperture opening 0/45 instrument for doing some low LPI silk-screen characterization.
Other than the excellent Barbieri SpectroLFP solution, is there anything else that comes to your mind?
Best / Roger
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