8-Hydroxyquinoline-5-sulphonic acid crystals under polarized light.

@Laksiyer initially gave the idea to view it under polarized light. So got hold of an old Nokia Screen that was lying around and made use of the LCD screen as a polarizing filter.


 it isn’t pretty but does the work.

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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