I ran across this all-in-one chip while I was just now looking into filter wheels, and I thought you all might find it of interest if you hadn't already seen it: http://opticalfiltershop.com/shop/photodiodes/pixelsensor-8-band-visible-photodiode-array-copy/
Are there other sensor chips like this? I'd be interested if there were a chip that not only covered some narrow bands of the visible range (as this one does) but also covered some bands from the UV and Infrared ranges.
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There are some broad spectrum linear CCDs. Nathan McCorkle might have suggestions. one is linked here: http://publiclab.org/notes/gaudi/04-03-2014/diy-micro-volume-spectrophotometer and http://publiclab.org/notes/borsaci06/02-01-2014/linear-ccd
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Thanks for the links!
Epilog: after pricing out individual filters for doing a filter wheel, I don't think I could beat the price of this one pixel sensor, which also doesn't require all the labor that a filter wheel would require. A company or organization might (?) be able to make filter wheels at a lower cost than the pixel sensor through bulk orders and such, but I doubt an individual like me could beat the cost by procuring filters individually. So, ixnay to the filter wheel.
That being said, mounting a monochrome camera behind a filter wheel would produce pictures, not just one pixel, in different spectra, and so you could potentially harvest a lot more information.
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