Olympus BX/AX light path to camera diameter

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microb
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Joined: Wed Mar 27, 2019 6:39 am

Olympus BX/AX light path to camera diameter

#1 Post by microb » Fri Jul 16, 2021 10:01 pm

For the filters like the analyzer and the filter cubes in a BX setup, a 25mm filter diameter is used. Now the AN does a 5 degree slant for the polarizer glass to minimize some reflection, so it's light path diameter is actually elliptical, cut down to just under 24mm. So clearly Olympus didn't really care about that outer ~1mm in radius.

But if I want custom AN slider, what is the minimum filter size without impinging on some valid camera field of view light path? In short, does it really need to be 23ish mm to 25mm wide? Can it be 17mm and no one with an Olympus objective is going to notice a reduction in their field of view?

The U-ANT is a 22mm diameter slanted at ~5 degrees. So that seems to be the min based off Olympus filters. Can it go smaller?

Thanks,
Ted

microb
Posts: 729
Joined: Wed Mar 27, 2019 6:39 am

Re: Olympus BX/AX light path to camera diameter

#2 Post by microb » Sat Jul 17, 2021 12:14 am

So I don't have a DIN retarder plate, but if they are 20mm wide, then the filter has to something down in the 17mm range.

"Modern first order retardation plates are built in a frame having standardized DIN dimensions (6 × 20 millimeters) that will enable their use in a variety of microscopes."
(https://www.olympus-lifescience.com/en/ ... rderplate/)

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