• Ready for the first print

    Ivan Stepaniuk04/05/2020 at 01:04 0 comments

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

  • Cardboard mess

    Ivan Stepaniuk04/01/2020 at 19:01 0 comments

    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.

    First spectra with the cardboard prototype
    In pink, a 532 nm green laser, in yellow a 650 nm red laser. The blue plot is some random white LED source.