3D-Printed spectroscope

After some tweaking trying to understand light baffles to reduce unwanted reflections, I am ready to print the first PLA prototype.

The cardboard prototype helped eliminating some uncertainty.

It worked better than expected and I got some very promising spectra. I used my mobile phone as camera, and two known laser sources to trim/calibrate the resulting spectra image. I did all that using just Gimp and a spreadsheet. The sensitivity of the sensor is not known so it can't be compensated, but as a proof of concept, it worked.