DIY Telescope: Building a Foucault Tester
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- Опубліковано 1 жов 2024
- I’ve been polishing this mirror for a few weeks now and now that it’s completely polished out it’s time to start checking its shape. And to do this, I need to build a device known as a Foucault tester. Although it may look crude, this is actually an extremely sensitive contraption that can measure inaccuracies in the mirror of thousands of a centimeter
#DIYTelescope #FoucaultTester #Telescopes
Hey Born would you let me use your diagram of the foucault tester for a video I'm making, I would of course credit you? Many thanks Rory
Hi There. Of course. It's a very simple design, so is a little flimsy, but does the job for the most part. You're free to use anything from the video if you want. Also, take a look at Stellafane. They have some very impressive designs and are waaay better at explaining how this all works than I am.
I was signed into the wrong account in my previous message.
@@BornAdventures Hey Born thank you so much. I'm just using a few seconds from the video just to show people the basics. Please let me know if there is anything I can do in return.
Where is the video on how to use it?
Have you made the video how to use it?
Have you finished the telescope yet? I'm curious to see how well your hand ground mirror works. I'm assuming youv seen Jhon Dobson's how to build a telescope documentary? It's a excellent resource.
Hey! Sorry for the late reply. I haven't yet. Life got in the way a bit and it's just sitting on the shelf at the moment. I'm planning on starting it again in two months time. The mirror was basically done, there's an extremely small turned up edge, so need to correct that before coating it and then it's just putting the actual scope together. John Dobson is a legend. There's a long video on YT where he makes a large mirror scope that I've watched probably 5 times already
@@BornAdventures its been 2 years, any updates?
OP......Where is the rest of this video, OP......
Lots of personal things put a pause on this. Got a kid on the way too. I can make an instructional on that? I think I'll pick it up in a year or so. Sorry for the long delay in posting.
Good work.
İs it possible ed apo refractor with flp53 glass can be grinding?
Hi Mehmet. It is very possible to grind your own refractor. But, it's exponentially more complicated than a newtonian. With all the elements, there are at least six surfaces that need to be figured to at least a 1/8 wavelength of light and flourite is very complicated to work with over pyrex or plate glass. But, it certainly can be done. I know that someone at Stellafanes ATM competition did a oil filled flp53 refractor in 2017. So maybe pop them a mail to ask if someone would be able to put you in touch with the person who made that one. I would be very interested to follow your progress, please keep me updated how it goes.
Next video
As soon as things settle down enough, it'll come.
@@BornAdventures ok