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LED conversion Zeiss Axiostar

 
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descall



Joined: 01 Oct 2011
Posts: 178
Location: United Kingdom

PostPosted: Thu Aug 13, 2015 1:22 am    Post subject: LED conversion Zeiss Axiostar Reply with quote

Hello Forum,

Can anyone provide advice with regards to converting a Zeiss Axiostar Plus to LED illumination please? It is for use in my new campervan when away on fieldwork, so I need to limit the power consumption. I include a couple of photos of the insides below. Many thanks for any help.

Best regards,
Des


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Pau
Site Admin


Joined: 20 Jan 2010
Posts: 4804
Location: Valencia, Spain

PostPosted: Thu Aug 13, 2015 2:29 am    Post subject: Reply with quote

You need to place the LED at the same position of the lamp filament, very close to the collecting lens (although because a LED chip is bigger than the halogen lamp filament the exact position is not very critical).

What illumination techniques do you use?
For BF you don't need a very powerful one, for cross pol, DIC or DF you need more power.

If you are not an electronics guy a light torch without its reflector and glass could be adapted without removing the halogen lamp, assuming that what you want is a provisional setup.
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Pau
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descall



Joined: 01 Oct 2011
Posts: 178
Location: United Kingdom

PostPosted: Thu Aug 13, 2015 3:41 am    Post subject: Reply with quote

Thanks Pau, I'll be using BF only. I'll give the LED torch technique a whirl and see how I get on. Best regards, Des
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Pau
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Joined: 20 Jan 2010
Posts: 4804
Location: Valencia, Spain

PostPosted: Thu Aug 13, 2015 4:14 am    Post subject: Reply with quote

Sorry, at first look I didn't understand the picture! Embarassed . It seems that the lamp holder must be accesed from the microscope base, so just placing a torch will not be doable. A microscope mirror placed over the lamp and an external focussable LED torch will work.
For a permanent conversion you must do some serious surgery
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Gary W Brown



Joined: 02 Mar 2008
Posts: 129
Location: Omaha, NE USA

PostPosted: Fri Aug 14, 2015 4:22 pm    Post subject: Led conversion for Axiostar Plus Reply with quote

Hello all,

I've done quite a few LED conversions and the Axiostar Plus is good candidate.

I have a conversion kit (110V) that easily goes in the position of the circuitry of the scope and powers a 1W LED that is sufficient for bright field applications.

I also did a project using an LED with variable intensity that was powered by three AAA batteries. This is my field scope and is comprised of components from five microscopes.

It's been a while since I've done the field scope, but if your are interested I'll try to locate the web sites where the components are available.

Best wishes,
Gary
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descall



Joined: 01 Oct 2011
Posts: 178
Location: United Kingdom

PostPosted: Fri Aug 14, 2015 11:57 pm    Post subject: Reply with quote

Hello Gary,

Thanks for your reply. I had a fiddle inside the Axiostar and then decided an alternative approach, since I needed something pretty soon. I bought a small LED microscope, which arrived yesterday and is very suitable for my field needs. The Axiostar may, afterall, have been a bit big for my minicamper, which I now plan to put on eBay. Thanks again for your information.

Best regards,
Des
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