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Alex,
James uses a bit of linear polarized sheet from eBay.
One small filter below the stage, above the illuminator and another up at the eyepiece end.
The waveplates made using Sellotape, lie just below the sample.
That’s all’s that is needed.
The samples can be prepared from various household chemicals - he uses Asprin and other common tablets dissolved in alcohol.
I’m very impressed with his results, I have an old zeiss which I may set up to give a go.
Ken
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