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ID polarizing condenser

 
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nanometer



Joined: 30 Apr 2016
Posts: 125
Location: Tucson, AZ

PostPosted: Thu Dec 21, 2017 9:13 pm    Post subject: ID polarizing condenser Reply with quote

I've had this condenser for a long time, but never took a good look at it until recently. My guess is a nicol prism polarizer due to the squarish prism inside and the fact that it modulates my computer screen. It has an oil cap. Is this an old Leitz condenser? Both irises work fine.



Thanks for any info.

Steve
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Choronzon



Joined: 21 Feb 2010
Posts: 379
Location: Chicago USA

PostPosted: Fri Dec 22, 2017 5:23 am    Post subject: Reply with quote

I would guess Reichert with a Leitz dovetail adapter, it only because I'm unfamiliar with the Leitz sleeve Pol condensers
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Pau
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Joined: 20 Jan 2010
Posts: 4317
Location: Valencia, Spain

PostPosted: Fri Dec 22, 2017 5:25 am    Post subject: Reply with quote

It seems an old Leitz condenser later adapted for more recent microscopes like the Orthoplan, note the brass sliding dovetail looking very different of the other parts.
You can test if it's a polarizing prism crossing it against another polarizer (or looking through it to a phone or computer screen if you don't have a polarizer)
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nanometer



Joined: 30 Apr 2016
Posts: 125
Location: Tucson, AZ

PostPosted: Fri Dec 22, 2017 8:19 am    Post subject: Reply with quote

Thanks guys. Still a question about who made the thing. Being familiar with Leitz, it seems odd they would have made something without putting their name on it.

Yes, it is a Leitz dovetail and fits on my Diavert condenser fork.

I guess the next step is to give it try. I'm thinking paramecia between crossed polarizers Smile

Not sure why this would be better than simply sticking a polarizer over my Heine--which is what I normally do.
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Pau
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PostPosted: Fri Dec 22, 2017 9:07 am    Post subject: Reply with quote

Quote:
Not sure why this would be better than simply sticking a polarizer over my Heine--which is what I normally do.

In most cases is better to place the polarizer under the condenser (except in the case when the condenser does alter the polarization state of the light)
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stefan



Joined: 17 Mar 2016
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Location: Scandinavia

PostPosted: Sat Dec 23, 2017 8:47 am    Post subject: Reply with quote

nanometer wrote:
Thanks guys. Still a question about who made the thing. Being familiar with Leitz, it seems odd they would have made something without putting their name on it.



If one has access to a lathe and some standard cutting tools, this kind of adapter is not hard to make. I had one made. I made a drawing and a more experienced friend made the bulk body with a standard lathe. Some additional work with a tiny saw and it was done. I did not do the dovetail but an adapter to use Leitz sleeve type condensers on another brand. Mine is aluminum but brass is also soft and easy to work on.
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