OH, I get it. So in a way, it is like a rotating filter wheel. But instead, you're using a prism to diffract each frequency. So that you end up getting a frequ

OH, I get it. So in a way, it is like a rotating filter wheel. But instead, you're using a prism to diffract each frequency. So that you end up getting a frequency per line. You'd have to calibrate the prism for straightness WRT to the horizontal pixels. And I see a calibration needed with a two pure wavelength lightsources, to get a baseline. Seems like it could be done for fairly cheap. Thanks for the heads up, knolan :)