I made some photos of a drying Bomarea seedpod I found at 3600m elevation on my local volcano, Tungurahua. I am posting it (straight out of Zerene, no retouching) to add another example of cross-polarization to the forum. Photos are on an Olympus MFT 20Mp sensor, Oly 60mm macro, camera-controlled focus-bracketing. Background is Protostar; cross-polarization eliminated much of the glare from that.
The first image is unpolarized:
The next image is cross-polarized, then slightly backed off from complete cross-polarization; I think some reflections are useful:
Cross-polarized Bomarea seedpods
Moderators: rjlittlefield, ChrisR, Chris S., Pau
Simple, yet effective, but i can imagine you could also get big improvement with bigger light source. And those techniques are hard to implement toghether.
One would need to use lens instead of diffuser sheet to retain polarization if polarizer is placed on light source. Or obtain large polarizer sheets to cover big diffusors. I've been thinking of implementing this technique outside of Epi microscope, but so far couldn't produce satisfactory results on ergonomic friendy setup.
Getting correct angles on multiple large light sources is also quite a pain.
One would need to use lens instead of diffuser sheet to retain polarization if polarizer is placed on light source. Or obtain large polarizer sheets to cover big diffusors. I've been thinking of implementing this technique outside of Epi microscope, but so far couldn't produce satisfactory results on ergonomic friendy setup.
Getting correct angles on multiple large light sources is also quite a pain.