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Do you know what this is

 
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LOCOPERRO



Joined: 04 May 2006
Posts: 5
Location: UK

PostPosted: Thu May 04, 2006 7:30 am    Post subject: Do you know what this is Reply with quote

It is for sale on ebay i have 2 like it but i have never been able to get an image of any use from them .Do you know what they are used for and what sort of microscope they belong to and how they work .
Thank you.

S:UK:28" target="_blank">http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=6275729571&ssPageName=ADME:BVery HappyS:UK:28
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Charles Krebs



Joined: 13 Jul 2004
Posts: 1200
Location: Issaquah, WA USA

PostPosted: Thu May 04, 2006 9:00 pm    Post subject: Reply with quote

I've never seen one, and it's hard to say from the pictures. Do you think it could be a an objective with a "built in" Lieberkuhn reflector?
See this reference:
http://micro.magnet.fsu.edu/optics/timeline/people/lieberkuhn.html
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LOCOPERRO



Joined: 04 May 2006
Posts: 5
Location: UK

PostPosted: Fri May 05, 2006 4:34 am    Post subject: Reply with quote

Charles Krebs wrote:
I've never seen one, and it's hard to say from the pictures. Do you think it could be a an objective with a "built in" Lieberkuhn reflector?
See this reference:
http://micro.magnet.fsu.edu/optics/timeline/people/lieberkuhn.html


could be but i have never managed to get an image from it one interestin bit which you can just make out in the picture is they have what seems to be a small frosted circle in the center of the glass at th end of the objective.

I have asked the people bidding on the one on ebay but they dont know they are just curious and noticed it has a large working distance
thank you
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rjlittlefield



Joined: 06 May 2005
Posts: 727
Location: Richland, WA, USA

PostPosted: Fri May 05, 2006 7:52 am    Post subject: Reply with quote

LOCOPERRO wrote:
i have never managed to get an image from it

I presume that you have attached this thing to a standard microscope and that light goes through it but all you see is the light, no image.

Will your scope let you get far enough back to place the subject at the stated 12.8mm away from the front of the objective?

Can you perhaps get that far away by holding a subject under the stage?

Getting proper placement may be a bit tricky. If the specs are correct then this will be about a 40X objective. The image will be dim and the depth of field will be very shallow.

--Rik
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psneeley



Joined: 11 Dec 2004
Posts: 23
Location: Utah

PostPosted: Fri May 05, 2006 12:27 pm    Post subject: Reply with quote

I had sort of assumed it was a reflecting objective -- but I really don't know.

See: http://xmission.com/~psneeley/Personal/reflectingmicro.JPG
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rene



Joined: 17 Mar 2005
Posts: 125

PostPosted: Thu May 11, 2006 2:32 pm    Post subject: Reply with quote

wow. when it is what i think it is, it went for ridiculously little money.

The huge working distance makes me think it is (partly) a mirror objective that projects the first image in the air, which is then being looked at with the rest of the objective.

Rene.
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LOCOPERRO



Joined: 04 May 2006
Posts: 5
Location: UK

PostPosted: Mon May 15, 2006 7:12 pm    Post subject: this weekend Reply with quote

Thanks to all I will try to dig them out this week end and have another go with them .Wanted to try this weekend but had to decorate the front room the wife has strange priorities.
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