Retarder Lambda plate

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Plasmid
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Retarder Lambda plate

#1 Post by Plasmid » Thu Dec 03, 2020 4:53 pm

I've been playing with the polarizing filters lately. And notice that I'm getting a shawdow image with Kohler illumination set up, and so I was wondering if a retarder Lambda polarizing plate would eliminate this effect.

Thank you.
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Greg Howald
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Re: Retarder Lambda plate

#2 Post by Greg Howald » Thu Dec 03, 2020 5:05 pm

That looks condenser related. Try lowering the condenser a bit. With Kholer lighting at lower magnification the condenser should be lowered a bit for best image. With mine I get a rather grainy circular view at the outer limits of the field of view if I do not lower the condenser.
Greg
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Plasmid
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Joined: Mon Sep 28, 2020 5:34 am
Location: North GA
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Re: Retarder Lambda plate

#3 Post by Plasmid » Thu Dec 03, 2020 11:35 pm

That worked, thank you Greg, I also had to open the field diaphragm and lower the light intensity a bit.
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