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Polarized light vs. switchable LED zones for microscope enhancement

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rfspezi:
I am considering modding the 144 LED ring light of my microscope to enhance contrast and readability.

As far as i know there are two common ways to do this.

1. Having zones of the LED-ring switchabel to control the direction from which the light shines at the target
2. Having a rotatable polarization filter in front of the LEDs/lens

For the polarization solution, there is a worst case loss of brighness of roughly 50%.
For the switchable zones solution it is dependant on the zone pattern.

However... is there one solution anyway superior over the other so that it's clear which way to go?

Ok... i could implement both... but i'd like to know your oppinion first ;)

jfiresto:
I think the answer to your question depends on what are you looking at and what is reducing the readability.

For example, I get less glare inspecting bare PCBs with a old-fashioned halogen, fiber optic ring light than with a typical, Chinese, three-row, 144-LED ring light – even though (perhaps because?) the latter illuminates less vertically.

By vanquishing shadows, a ring light reduces contrast.

jfiresto:
FWIW, I am slowly trying to duplicate a fiber optic, dual gooseneck system like the following, ultimately with an LED light source.





[I see inserting attachments is still a WIP.]

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