How to build a polariscope with common items to see the stress in different materials
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- čas přidán 14. 03. 2022
- Do you have any questions or suggestions? I would like to hear them in the comments!
My Email address: advancedtinkering@yahoo.com
Do you have any questions or suggestions? I would like to hear them in the comments! If you want, you can join my patreon to help me working on my projects. All posts will be public, so you can participate without paying. / advancedtinkering
Engineerguys video about LCD screens:
• LCD Monitor Teardown
Pictures I used in the video:
Codixx:
www.codixx.de/fileadmin/_proc...
leica-microsystems:
webcdn.leica-microsystems.com...
edbergphoto:
www.edbergphoto.com/pages/Tip-... - Věda a technologie
![Gemstones go to Disco?! [ Polariscope Tutorial ]](http://i.ytimg.com/vi/A6vOHbM6TYs/mqdefault.jpg)
WOOOOW that looks COOL!! didn't even imagine you could see THAT MUCH the stress in the glass
...that clip of the glass tube between the filters being stressed by hand is CRAZY!!!!
Nice demonstration of the Polariscope and the Birefringence of some materials, it is the best way to find Stress Concentration in the Geometry of some Mechanical components and parts, the number of stripes is proportional to the Stress in the component.
*Another Tool to add to my DIY/OS Non-Destructive Testing Arsenal*
I have a book from 1964 showing how to make a polariscope. So I thought maybe I should look and see if any on CZcams and there you were thank you for your demonstration. Great work and much more up to date to say the least and of course advanced to today's standards. Thanks again
That is the best example of a cheep polariscope I have ever seen, I will absolutely be trying it tomorrow morning. I have only ever seen commercially available ones that were very expensive
Thank you! Let me know if it worked! :)
Hello, great contents! I'm excited to see what else you are doing, as well as for the past projects...
Cheers!
Nice, i did not know, how easy it ist build for everyone. Cool Video.
Echt eine super interessante Methode
Muss ich dringend auch mal Zuhause ausprobieren
This was great! And the execution of the idea was beautifully simple.
This is absolutely fascinating! Thank you so much for making this, it’s so cool!
I second that. I'm not a maker/tinkerer at all, but this stuff is so cool, practically applied and well explained!
@@FrozensRevenger Thanks to both of you! Appreciate it!
You can also "harvest" polarisers from broken old LCD displays.
Most interesting.
Very nice demonstration and very clearly explained! I have a background in liquid crystals and polarisation microscopy so I can safely say that you explained it better than I usually manage to do 😀
Just as a technical note you can see the polarisation due to reflection still, in the walls of the annealed glass tube and round bottom flask, is related to s and p Fresnel coefficients & Brewster angle.
Thank you!
And thank you for the additional information!
Very nice video! 🙂
supercool experiment
This is a very nice video clearly demonstrating stress in glass. Any idea how to see the fringes in color for glass, not just for plastic? Does a circular polarizer make a difference?
Very nice !
Super Erklärung, vielen Dank. Könntest du vllt. die Folie, die du bestellt hast, verlinken?
very interesting
I think that your excellent video describes just what I need. I am looking for a way to check for stress in borosilicate glass shades made for antique light fixtures, some fairly large, for example a 10" sphere. If I set up a unit as you describe here will this work for something of this size placed between the light source and the polarization sheet ? It would be used for smaller shades and chimneys as well. What has happened in the past the glassblower has mold blown a shade, and once annealed he will reheat to fire polish the top and bottom edges and then places the shade on a shelf and it looks fine but will crack in places later. I'm not even close to an expert but I am wondering if he has annealed it at all or not correctly after the fire polishing work. Thanks for any help you might have to offer.
Hello,
yes, of course you can also use this setup with larger objects.
Why does he fire polish the glass after he annealed it? It is possible that he introduced new stress when fire polishing it. I think it would be best if he annealed it again after fire polishing.
But I am also not a professional glassblower (far from it). But that would be my guess.
m@@AdvancedTinkering I agree. He was fire polishing using a small torch, I suspect not large enough to heat any more of the shade than the edge that needed to be fire polished. It is my understanding that when glass is brought up to a temp required for this operation that it would have to be annealed again. He is shipping one for me to inspect - if it makes it here in one piece I'll check it for stress in the way you describe - I've already ordered the polarization sheet from Amazon and it should arrive before the shade does. It'll be interesting to see what I find and I'll let you know the outcome. Joel
finally, I can VISUALISE how stressed I am
Do you have a link to the filter so we can purchase it?
Look for "linear polarization A4 sheet" on Amazon and you will find it. :)
👍👍👍
Super, präzise, theoretischer Teil- praktischer Teil, gut erklärt und dann hab auch ich das verstanden. Was machst Du beruflich?
Danke dir! Ich studiere Chemie.
I want to know more about this experiment like if there are any formula applied or any calculations involved. Can someone please help me.
Würden auch polfilter dafür gehen??
Klar, in dem Video werden auch Polfilter benutzt. Nur als Folie.
I just need a polirized light source to see the stress on plastic
You can polarize light by using the same sort of filter. This means you would need two filters, one to polarize the light and a second to check if the polarization has changed.