MicrobeHunter.com Microscopy Forum

I also recently picked up this viewing screen of the same vintage as my universal on eBay for 40 dollars shipped. This too will soon have a new blue paint job.

Thank you for explaining the prism prpair process! This really is a delicate repair job so no wonder nobody writes about it. I have one of thee epi DIC prisms too and was thinking about a repair solution. Are the epi prisms used with short barrel objectives ? Some of the objectives are long barrel ...

Very cool thread Microworldofgems! The paint job is great and I find your prism repair inspiring. Would Canada balsam work for gluing the prism wedges? I noticed you removed the optovar from the tube head. I had the impression once its off its nearly impossible to get it back to its original positi...

Pete, Can you post a photo of your slider ?

75RR wrote: ↑

Sun Mar 08, 2020 5:30 am

Diamond crystal images look sharp as tacks - do you suspend the camera?

Also what paint did you use?

Here is a photo showing the camera mounted.

Diamond crystal images look sharp as tacks - do you suspend the camera? Also what paint did you use? The camera is mounted to a black tube above the relay lens in the image. It is super rigid. I used a diagnostic instruments tube that I modified to fit an Olympus clamp that attaches to the black sn...

Nice work! Good to see a Universal brought back up to scratch Would have liked to have seen bigger photos These are the upload image specs: There is a limit to 5 pictures per post, each picture can not be larger than 512KB and can not be larger than 1024x1024. Thanks for the photo details, I was ha...

It's a bit difficult to tell the angle the prisms are ground at. Someone on this forum was interested in trying to grind some of their own out of calcite. It looks like quartz might a good alternative if calcite is too expensive and difficult to polish if that's the case. I thought about trying it ...

BramHuntingNematodes wrote: ↑

Sat Mar 07, 2020 10:52 pm

wow is it really a nomarski prism or is it a savart plate?

To my knowledge it is a nomarski prism, composed of two quartz wedges.

Admirable job ! It looks like the blue is a spray paint ? which brand is it ? are you happy with its durability ? Did you remove the old paint and prepare the surface for the blue paint ? thanks in advance for the details . It was rustoleum spray paint I bought from Home Depot. It’s been pretty goo...

This is exactly my scope pictured above in the orange manual. Just wish I could find more prisms. I never saw the set on eBay unfortunately although I have searches saved for such things. Too bad I missed that set. If anyone get a line on a set of prisms I would appreciate if anyone would let me kno...

Another example diamond surface.

Here is another diamond surface.

Here is an example of the prism rebuild... I baked the prisms in the over for about an hour to try to decompose the cement holding them in place. Using a stereo microscope and a sharp pick, I was able to remove them from the mount (carefully). I then ground an index notch on the corner of the prism ...

Here are a couple of images taken on the blue Zeiss. This is the surface of a diamond crystal. (Note that the photos are sharp, but the upload resolution on the site here is pretty low. You can see more examples of Epi-DIC images on my Instagram @microworldofgems

Hi, I have been working on this project for a while initially sourcing some parts about 4 years ago, then a donor scope, then more parts...in particular the inko epi DIC lenses (long working distance models which are hard to find). Recently I have gotten the scope pretty well “finished” but may stil...

Very nice scope Josh, I was looking at this same unit on eBay, but went with a different unit. (Universal 1) I’m glad it found a good home.

That black photomicroscope is just beautiful! Very nice scope!

Hi Einman, do you have any clue where someone could find a 20x DIC upper prism for the AO scope? I have an epi DIC unit, but only have the 10x prism. Would love to find others to complete a full set.

Thanks

Edmund optical has lambda plate plastic sheet available for about 15 bucks for a 2 inch square.

Thanks for the reply....that is more of less what I feared.

Thanks for the advice! I recently bought a 42mm dovetail to t-mount adapter and mounted it to my drill press and machined down the dovetail till it fit. So the camera is mounted and optical performance of the expo star unit is really excellent. Now, does anyone have a clue where I can get additional...

Hi everyone, I am looking for 20 and 40 x DIC Prisms. These seems to have almost no presence on the second hand market. Does anyone have either of these laying around that they would want to sell? I mainly will use it for episcopic DIC on gem materials and I already have the other required hardware ...

Hi Einman, could you advise me as to where you got the adapter for the canon camera to AO shutter assembly? I also have an AO DIC (episcopacy scope and am desperately looking for additional DIC prisms. I only have a 10x. Do you know where I might be able to find those as well? In an earlier string I...