4 Comments Add yours

  1. Manu Prakash says:

    Beautiful – both the resourcefulness and the pictures in the end. I am a little surprised that the background in not darker. I think you just put the polarizer and no analyzer.

    I would suggest using something very thin (polarization plastic filters); something like this: https://www.amazon.com/Educational-Innovations-TRTV2091-Polarizing-Filter/dp/B009P8B548

    Put two of them in cross alignment – so your image is completely dark – unless the crystal changes your polarization axis. I just saw a 3D movie and brought the 3D glasses home – and will make a quick video of using the 3D glasses for this task. But you could beat me to it 😉

    Welcome to the foldscope community – its so wonderful to have hackers like you engage, inspire and teach everyone. so thrilled you are here.


  2. laksiyer says:

    The great thing with the new foldscope is that rotation of either the polarizer or analyzer is trivial with the circular magnets.. I just got my polarizer film.. cant wait to have a go at some crystals.. Going to start with an old favorite— baking soda..

  3. Chawang says:

    Yeah i didn’t use the analyzer .. and i need to cut down the filter into a manageable size 🙂

  4. Manu Prakash says:

    Great point Laks 🙂 Can’t wait for your implementation.

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