Olympus Bh2-KPA polarizing attachment

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Antartica
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Olympus Bh2-KPA polarizing attachment

#1 Post by Antartica » Tue Dec 06, 2022 6:00 pm

I'm looking at the simple polarizing attachment for the Olympus bh2. Searching around on the internet, I'm seeing a lot of sellers offering the intermediate tube and analyzer, however, almost none of them include the wave plate or the polarizer that goes on the substage.

Are these rare or something, or is there compatibility with another series or brand? Because I see people on ebay purchasing the intermediate tube WITHOUT the wave plate and polarizer. So I'm just wondering if they know something I don't. Are they substituting something else in? and if so does anyone know what else I can use?

PeteM
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Re: Olympus Bh2-KPA polarizing attachment

#2 Post by PeteM » Tue Dec 06, 2022 6:29 pm

Most any high quality (ideally linear) camera polarizer of the right dimension will work. Circular polarizers can also work, but may need to be reversed. Get one that just fits the recess, so it's easy to rotate. You can also cobble together a wave plate above it, that rotates separately, to provide a bit more control.

OEM Olympus polarizers and analyzers have very high extinction when crossed and decent transmission when aligned. That makes a difference in both polarization and DIC. You won't find that in cheap polarizers, but good ones are available for less than Olympus prices.

You can also make your own wave plate (for gout, simple polarization, etc.) to fit in the slot under some simple Olympus intermediate analyzers. The slider machined or rapid prototyped. The wave plate (quarter, half, full) purchased off Ebay.

Scarodactyl
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Re: Olympus Bh2-KPA polarizing attachment

#3 Post by Scarodactyl » Tue Dec 06, 2022 7:21 pm

Antartica wrote:
Tue Dec 06, 2022 6:00 pm
Are these rare or something
Yes. Petrographic components are almost always rare, expensive and in too much demand. Presumably geologists more rarely upgrade scopes than biology researchers. That seems to also pull ul the price of more basic polarization equipment.

Antartica
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Re: Olympus Bh2-KPA polarizing attachment

#4 Post by Antartica » Tue Dec 06, 2022 11:41 pm

Okay, so let’s say I get something like this

https://www.ebay.com/itm/265403178603?h ... R4CM6ZydYQ

It comes without the polarizer. Can anyone link me to a good substitute? There are no bh2 polarizers available that I can see so I would need to find something else that works

Antartica
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Re: Olympus Bh2-KPA polarizing attachment

#5 Post by Antartica » Wed Dec 07, 2022 3:36 am

PeteM wrote:
Tue Dec 06, 2022 6:29 pm

You can also make your own wave plate (for gout, simple polarization, etc.) to fit in the slot under some simple Olympus intermediate analyzers. The slider machined or rapid prototyped. The wave plate (quarter, half, full) purchased off Ebay.
Also the Olympus manual only has one waveplate model listed the TP 530-2. Is that quarter, half or full? are there other tint plates available?

And see my post above regarding the polarizer.

TonyT
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Re: Olympus Bh2-KPA polarizing attachment

#6 Post by TonyT » Wed Dec 07, 2022 10:00 pm

There is a 45mm Olympus Polarizer on ebay, from Australia for $114.00 US.
I have an identical one; works perfectly on a BHS
Item 364049995282
https://www.ebay.com/itm/364049995282?h ... R5re-eidYQ
New Brunswick
Canada

thomasfrank
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Re: Olympus Bh2-KPA polarizing attachment

#7 Post by thomasfrank » Tue Apr 25, 2023 8:44 am

It's crucial to locate replacements made especially for the BH2-KPA attachment if you're lacking the wave plate and polarizer for that piece of equipment. Replacement parts might be available from Olympus or a source of specialized microscope parts. The wave plate and polarizer should not be replaced with any other parts, lol shot since this could lead to insufficient polarization and poor image quality.

PeteM
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Re: Olympus Bh2-KPA polarizing attachment

#8 Post by PeteM » Tue Apr 25, 2023 5:25 pm

^^^ trolled by ChatGTP??

Scarodactyl
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Re: Olympus Bh2-KPA polarizing attachment

#9 Post by Scarodactyl » Tue Apr 25, 2023 6:12 pm

Yes, and with a hidden link.

Tom Jones
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Re: Olympus Bh2-KPA polarizing attachment

#10 Post by Tom Jones » Tue Apr 25, 2023 8:21 pm

I must be a little slow... where's the hidden link?

Scarodactyl
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Re: Olympus Bh2-KPA polarizing attachment

#11 Post by Scarodactyl » Tue Apr 25, 2023 8:54 pm

Quote the post to see the code for the tiny hidden text set to the background color with a link attached

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woyjwjl
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Re: Olympus Bh2-KPA polarizing attachment

#12 Post by woyjwjl » Wed Apr 26, 2023 1:13 am

The three most common delay plates generate optical path length differences across the entire wavelength range (between 530 and 570 nanometers), half wavelength (260-280 nanometers), or quarter wavelength (137-150 nanometers).

so.......
Micrographers from China, thanks to the forum for providing a platform for exchange

Tom Jones
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Re: Olympus Bh2-KPA polarizing attachment

#13 Post by Tom Jones » Wed Apr 26, 2023 3:31 am

Scarodactyl , Nice catch with the link! Thanks!

Macro_Cosmos
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Re: Olympus Bh2-KPA polarizing attachment

#14 Post by Macro_Cosmos » Tue May 09, 2023 12:24 am

Code: Select all

[quote=thomasfrank post_id=134895 time=1682412260 user_id=4680]
[url=https://iogamesio.org/lolshotio][color=#FFFFFF][size=1]lol shot[/size][/color][/url] 
[/quote]
:roll:

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