Patch Stops

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Dave S
Posts: 250
Joined: Wed May 22, 2019 11:06 am
Location: Suffolk, UK
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Patch Stops

#1 Post by Dave S » Fri Sep 13, 2019 10:02 am

Arrived today, a set of 32m Dark Field Patch Stops, and Oblique Illumination Stops, cut from 1.5mm thick plastic (probably Acetal/Delrin)

7, 8, 11, 13, and 20mm Dark Field patch stops, and four different Oblique stops.
ptach-stops.jpg
ptach-stops.jpg (57.25 KiB) Viewed 641 times
Brunel SP100 (with 4x, 10x, 40x,60x, and 100x (oil) plan objectives), and Canon EOS 4000d Camera (microscopy use only)

microb
Posts: 92
Joined: Wed Mar 27, 2019 6:39 am

Re: Patch Stops

#2 Post by microb » Fri Sep 13, 2019 2:31 pm

Cool looking set.

They probably are made from PLA since they look like they are 3D printed. 3D printings can have "stringing" which are little threads of plastic as the head switches from one part to the other. A file or sand paper can remove that. Also the crisscross pattern is the 3D head printing out the part.

Someone put their own set of 3D models, minus the oblique darkfields, up on Thingiverse: https://www.thingiverse.com/thing:633301

Sauerkraut
Posts: 196
Joined: Tue Apr 16, 2019 2:07 am
Location: Oregon, USA

Re: Patch Stops

#3 Post by Sauerkraut » Fri Sep 13, 2019 3:16 pm

Hopefully you can share some images and techniques if you get some good results with the oblique patches.

I only had intermittent and fleeting luck with my Chinese scope with the oblique patches. But maybe the Optiphot will perform better since it already gives better dark field.

Dave S
Posts: 250
Joined: Wed May 22, 2019 11:06 am
Location: Suffolk, UK
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Re: Patch Stops

#4 Post by Dave S » Fri Sep 13, 2019 4:17 pm

microb wrote:
Fri Sep 13, 2019 2:31 pm
Cool looking set.

They probably are made from PLA since they look like they are 3D printed. 3D printings can have "stringing" which are little threads of plastic as the head switches from one part to the other. A file or sand paper can remove that. Also the crisscross pattern is the 3D head printing out the part.

Someone put their own set of 3D models, minus the oblique darkfields, up on Thingiverse: https://www.thingiverse.com/thing:633301
Ah, I never thought of that Bob, and I am sure that you are right. :)
Brunel SP100 (with 4x, 10x, 40x,60x, and 100x (oil) plan objectives), and Canon EOS 4000d Camera (microscopy use only)

Dave S
Posts: 250
Joined: Wed May 22, 2019 11:06 am
Location: Suffolk, UK
Contact:

Re: Patch Stops

#5 Post by Dave S » Fri Sep 13, 2019 4:19 pm

Sauerkraut wrote:
Fri Sep 13, 2019 3:16 pm
Hopefully you can share some images and techniques if you get some good results with the oblique patches.

I only had intermittent and fleeting luck with my Chinese scope with the oblique patches. But maybe the Optiphot will perform better since it already gives better dark field.
Well, I can but try, and it will be interesting to experiment.

If successful, I will share the results.
Brunel SP100 (with 4x, 10x, 40x,60x, and 100x (oil) plan objectives), and Canon EOS 4000d Camera (microscopy use only)

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