LOMO microscope hunting for you

Have a problem finding shops that sell specific materials? Ask here. Are you looking for microscope parts? Do you have anything to offer for sale? Note: this is not a section for external companies to advertise their products.
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Dmi3n
Posts: 16
Joined: Thu Feb 06, 2020 4:14 pm
Location: Russia, Kaliningrad

LOMO microscope hunting for you

#1 Post by Dmi3n » Mon Feb 10, 2020 8:02 pm

Greetings to everyone. I live in Russia and there are many cheap LOMO microscopes available for me as I have some contacts in institutes and univesrsities who ocasionally upgrade their gear so old but still good (often they were on the shelf 99% of time) microscopes are sold dirt cheap or even thrown away. I know pretty much about LOMO microscopes and can fully service them from re-greasing to machining new parts. So I can find pretty much any microscope for you, from student Biolam to research Lyumam, service it properly if needed and ship to you for good price. Also I can find individual objectives, eyepieces, parts, anything. I can sell it via Ebay to provide guarantees. PM me if you need anything.
Scopes: CZJ NfPk w/ 45mm apo objectives, Phv phase contrast, Epi Pol illuminator, trinocular head, CZJ Epityp-2 Pol (currently dismantled for full restoration and recollimation) w/ D32 microhardness tester and photomicrography attachment.

jmp
Posts: 5
Joined: Sun Feb 16, 2020 2:07 am
Location: Texas

Re: LOMO microscope hunting for you

#2 Post by jmp » Tue Feb 18, 2020 3:09 am

Hi Dmi3n,

My first microscope was one of those ubiquitous BIOLAMs, which I still have and use. Recently I aquired a few more LOMO models that I'm restoring: a Metam-IQ, a Laboroscope and an Invertoscope (I'm quite fond of this last one).

I've been keeping an eye on Ebay but some parts are a bit hard to find there, so I'm going to take advantage of your kind offer to do some part hunting. Right now I'm interested in TQA 20x and 10x objectives, these are long working distance objectives for the inverted microscopes, and in a 10x QPA phase objective for the Laboroscope. If you happen to stumble upon any of those let me know! I'd be happy to by them from you through Ebay.

Other parts I'd be interested to get my hands on, eventually, are the EPI arm of a LUMAM, to upgrade the Laboroscope (since the rest of the microscope body is the same for both models), and perhaps the variant of the oblique condenser for the Laboroscope.

Besides hunting for parts I'm also looking for information about the DIC module for the Invertoscope. From the little that I've been able to grasp from bits and pieces on the Internet, it looks to me that its not real DIC but more of an oblique illumination hack, perhaps you know more about this?

Regards,
jmp

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Dmi3n
Posts: 16
Joined: Thu Feb 06, 2020 4:14 pm
Location: Russia, Kaliningrad

Re: LOMO microscope hunting for you

#3 Post by Dmi3n » Tue Feb 18, 2020 8:23 am

jmp wrote:
Tue Feb 18, 2020 3:09 am
Hi Dmi3n,

My first microscope was one of those ubiquitous BIOLAMs, which I still have and use. Recently I aquired a few more LOMO models that I'm restoring: a Metam-IQ, a Laboroscope and an Invertoscope (I'm quite fond of this last one).

I've been keeping an eye on Ebay but some parts are a bit hard to find there, so I'm going to take advantage of your kind offer to do some part hunting. Right now I'm interested in TQA 20x and 10x objectives, these are long working distance objectives for the inverted microscopes, and in a 10x QPA phase objective for the Laboroscope. If you happen to stumble upon any of those let me know! I'd be happy to by them from you through Ebay.

Other parts I'd be interested to get my hands on, eventually, are the EPI arm of a LUMAM, to upgrade the Laboroscope (since the rest of the microscope body is the same for both models), and perhaps the variant of the oblique condenser for the Laboroscope.

Besides hunting for parts I'm also looking for information about the DIC module for the Invertoscope. From the little that I've been able to grasp from bits and pieces on the Internet, it looks to me that its not real DIC but more of an oblique illumination hack, perhaps you know more about this?

Regards,
jmp
Hi jmp, unfortunately those newer microscopes are quite rare at used market because they are still used in work in laboratories. If I find anything, I'll PM you. As far as I know, there was no mass-produced LOMO DIC modules, only some prototypes.
Scopes: CZJ NfPk w/ 45mm apo objectives, Phv phase contrast, Epi Pol illuminator, trinocular head, CZJ Epityp-2 Pol (currently dismantled for full restoration and recollimation) w/ D32 microhardness tester and photomicrography attachment.

jmp
Posts: 5
Joined: Sun Feb 16, 2020 2:07 am
Location: Texas

Re: LOMO microscope hunting for you

#4 Post by jmp » Fri Feb 21, 2020 7:35 pm

Hi Dmi3n,

Seems I can't reply via PM (registered recently, can receive but not send PM). Any way, thanks for the info, and yes, please send me the PDF that you have for the Biolam P-1. The model sold in the US specifically mentioned DIC as an option for it. Then there's this:
Image
This is a filter that is a perfect fit for the P-1, it has a polarizing filter and a slit beneath it but no trace of a Nomarski prism. That's why I get the impression that this filter is more for oblique lighting that anything else.

Saludos,
Jmp

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Dmi3n
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Location: Russia, Kaliningrad

Re: LOMO microscope hunting for you

#5 Post by Dmi3n » Sat Feb 22, 2020 9:38 am

jmp wrote:
Fri Feb 21, 2020 7:35 pm
Hi Dmi3n,

Seems I can't reply via PM (registered recently, can receive but not send PM). Any way, thanks for the info, and yes, please send me the PDF that you have for the Biolam P-1. The model sold in the US specifically mentioned DIC as an option for it. Then there's this:
Image
This is a filter that is a perfect fit for the P-1, it has a polarizing filter and a slit beneath it but no trace of a Nomarski prism. That's why I get the impression that this filter is more for oblique lighting that anything else.

Saludos,
Jmp
Hi jmp. I have seen many P-1s for sale, but none of them had this filter. I'll upload manual at google drive soon and send you the link.
Scopes: CZJ NfPk w/ 45mm apo objectives, Phv phase contrast, Epi Pol illuminator, trinocular head, CZJ Epityp-2 Pol (currently dismantled for full restoration and recollimation) w/ D32 microhardness tester and photomicrography attachment.

MicroBob
Posts: 1837
Joined: Sun Dec 25, 2016 9:11 am

Re: LOMO microscope hunting for you

#6 Post by MicroBob » Sat Feb 22, 2020 12:10 pm

HiJmp,
for the PZO DIC system there was a slit condenser as one option. It is used in combination with a prism above the objective and gives a 3D DIC effect but more oriented that the effect that results from the use of a prism condenser.

Bob

jmp
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Location: Texas

Re: LOMO microscope hunting for you

#7 Post by jmp » Sun Mar 01, 2020 4:16 pm

Thanks for the info Bob. I've found some references to that slit condenser from the PZO in the forums.

Regards,
Jmp

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Dmi3n
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Location: Russia, Kaliningrad

Re: LOMO microscope hunting for you

#8 Post by Dmi3n » Sun Mar 01, 2020 8:28 pm

PZO system is called DIC after Pluta as I recall, he was one of Nomarski's collegues or students. Maybe you can find his original article on the net.
Scopes: CZJ NfPk w/ 45mm apo objectives, Phv phase contrast, Epi Pol illuminator, trinocular head, CZJ Epityp-2 Pol (currently dismantled for full restoration and recollimation) w/ D32 microhardness tester and photomicrography attachment.

MichaelG.
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Location: NorthWest England

Re: LOMO microscope hunting for you

#9 Post by MichaelG. » Sun Mar 01, 2020 10:22 pm

Interference microscopy of polymer fibres*
M. Pluta
First published:December 1972 https://doi.org/10.1111/j.1365-2818.1972.tb01061.x Citations: 156
† Presented at the ‘Micro‐72’ meeting, Oxford, 10 April 1972.

____________

https://onlinelibrary.wiley.com/doi/pdf ... .tb01061.x

Sorry ... I haven’t yet found a free download; but many University Libraries will have access.

MichaelG.
Too many 'projects'

jmp
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Joined: Sun Feb 16, 2020 2:07 am
Location: Texas

Re: LOMO microscope hunting for you

#10 Post by jmp » Mon Mar 02, 2020 1:40 am

Thanks Dmi3n and Michael. I got Pluta's paper, will be an interesting read.

jmp
Posts: 5
Joined: Sun Feb 16, 2020 2:07 am
Location: Texas

Re: LOMO microscope hunting for you

#11 Post by jmp » Tue Mar 10, 2020 3:27 pm

Just found on the web a brochure from a re-branded LOMO BIOLAM P-1 inverted microscope here. It shows that indeed DIC was possible for 10x and 20x using 2 separate filter/prism sliders with this microscope. The bigger slider, shown in the photos in previous posts, has a slith and a polarized filter and sits in a slot that is located between the condenser lens and the collimating lens of the light source. The smaller slider holds the prism that sits between the objective and ocular when inserted into the light path. This is similar to what Microbob described about the slith condenser option for the PZO.

Given that is unlikely for this particular prism slider to appear on ebay, I wonder if adapting the prism from another DIC system, such as the one shown here from a Zeiss Universal, using a 3D printed frame would have any chance of working at all, or if its worth at all trying. Would be quite convenient to be able to quickly switch between bf-phase-dic using filters (since I have the phase sliders). I guess that I can get away with just oblique illumination using custom filters that I can 3D print myself, and avoid the trouble.

Jmp

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