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Double polarization of crystals

 
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Gilles Benoit



Joined: 03 Dec 2019
Posts: 3
Location: Gatineau, Quebec, Canada

PostPosted: Sun Dec 22, 2019 4:52 pm    Post subject: Double polarization of crystals Reply with quote

This is my first post. I recently started experimenting with double polarization of crystals after reading an article by Robert Berdan.
I appreciate your comments and suggestions.
Gilles

1.Vitamin C crystals, double polarization, Nikon D750


2,Beta-Alanine & Glutamine Crystal, double polarisation, 20X, Focus stacking. Nikon D750


3. Beta-Alanine & Glutamine Crystal, double polarisation, 20X, Focus stacking. Nikon D750


4.Crystal double polarization, Focus stacking, Nikon D750, Mikaton 20mm lens + Extension Tube


5. Glutamine Crystal, Double polarization, Focus Stacking, 40X, Nikon D750


6.Vitamin C Crystal, double polarization, Focus stacking, Nikon D750, Mikaton 20mm lens + Extension Tube

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Pau
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Joined: 20 Jan 2010
Posts: 4882
Location: Valencia, Spain

PostPosted: Tue Dec 24, 2019 2:18 am    Post subject: Reply with quote

Hi Gilles, welcome aboard!

They are very nice colorful images.

I'm curious about your use of the term "double polarization", I think that the right expression is crossed polarizers: your images seem typical of the use of a polarizer under the subject and another polarizer called analyzer over it.
Double polarization or dual polarization is another concept, much more arcane for non physicists like me.
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Gilles Benoit



Joined: 03 Dec 2019
Posts: 3
Location: Gatineau, Quebec, Canada

PostPosted: Tue Dec 24, 2019 2:14 pm    Post subject: Reply with quote

Thank you, Pau
I appreciate the clarification on crossed polarization.
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