Making a Monolithic Telescope Part 2: Machining Glass
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- Опубліковано 11 чер 2024
- The second video in the series about manufacturing a small solid telescope. Time to make my hands dirty while doing artisanal stuff.
CONTENTS:
0:00 Intro
0:46 The monolithic version of the Cassegrain
2:23 About baffles and stray light
3:18 Drilling the glass core
6:00 Radius milling the glass surfaces
9:35 Calculating the Best Fit Sphere in Excel
13:52 Drilling baffles
14:23 Using spherometers
15:44 This Beat is Spherotronic
16:31 Rough / fine grinding
18:05 Optical Pitch polishing
20:43 What's next?
22:05 Looking through the uncorrected device
23:34 Thank you!
Previous video in this series about the theory of aspherics and optical design: • Making a Monolithic Te...
Video on the concept of the monolithic telescope featuring inventor Rik ter Horst: • Why is this Space Tele...
Video about radius grinding and the Loh CNC: • CNC Radius Milling in ...
More about the properties of optical pitch: • How to make Very Flat ...
You can support Huygens Optics on Patreon: / huygens_optics
Download URL for zip-file containing the example MS Excel sheet for doing BFS calculations: www.huygensoptics.com/assets/...
Windows program for calculating milling angle and evaluating spherometer readings: www.huygensoptics.com/assets/...
Download and use at your own risk. Your virus scanner will probably evaluate this download carefully and scream murder and fire because it is a rarely occurring executable.
I used a few short clips from the following UA-cam videos, assuming it is covered under "fair use" by placing references to the channels, and links to the corresponding videos in the description.
At 15:44, I made an 18 seconds remix of Technotronic's hit "Pump up the Jam". Please enjoy the original hit song by these Belgian techno pioneers: • Technotronic - Pump Up...
At 23:21: Shot take from Edmund Optics video "How an Aspheric Lens is Made": • How an Aspheric Lens i...
Did I forget to mention you here? Let me know and I will set things straight. - Наука та технологія
Dancing lesson classes are now fully booked for 2022.
No one else but a optical engineer has so precise moves 😂😂
I have been EAGERLY awaiting this....
Yessss❤️😎
Can you give us a source for glass? Maybe an idea of what kind of glass to order so we can source it ourselves?
I am in Oregon, my kids go to PSU where the original monolithic lenses were sent......
Where can we buy the record Spherotronic? i like the music video. I am looking forward to the vapor coating and the pitch patterns
Wow, incredible project. Thanks for sharing your knowledge and experience so clearly!
And reflectively!
Evidently the life of an optical expert is kind of a grind....
@@4n2earth22 But it polishes up nicely! 😃
@@Hydrazine1000 @4n 2earth - goddemit you guys, god demmit!!!=)
As I was watching I thought .. 'SMH would love this guy'.
Now I'm wondering how you could integrate a "Wife Mode" into a telescope.
That ultra sphereotronic should be a staple of every reputable discotheque in the world.
I am almost insulted there was no link to a soundcloud page
That's the absolute most inappropriate thing I've ever heard anyone say, ever.
Discos still exist!?
@@tubedude54 i think they are called MP3otheques Now but the concept is similar
This series is easily the one I look forward to the most on UA-cam. Even if there's no way I could make such a thing, it's still brilliant to learn how it is done.
I agree. It is such a monumental task, that I have the utmost respect for someone who even attempts it, let alone succeeds
I absolutely second this
Hear hear!
The 15:45 moment caught me off guard. Thanks for sharing your process with so much detail and fun bits. It makes it twice as enjoyable.
Been looking forward to part 2, can't wait for more! As an engineer, I find these technical deep-dives very interesting. Like last episode, please don't shy away from the maths, there's not enough technical content like this on youtube!
Thanks for this comment. I'm often in doubt about whether my video's are not too niche and technical. But I guess in this case it's partly what attracts a large fraction of the viewers.
@@HuygensOptics Possibly make the technical asides clear sections and note timestamps to skip them for uninterested viewers?
@@bachaddict Similar to how CuriousMarc does his elevator music technical interludes?
@@HuygensOptics Viewers who don't care for the math can easily skip it. Everyone who appreciates the math cannot easily (or at all) watch the sections if they're left out.
@@HuygensOptics I think you shouldn't hold back on the technical aspects, as long as they're of interest to you.
I'm so damn happy that the original monolithic telescope video managed to get snagged by the algorithm. Without that I probably still would have no idea that this channel existed, and considering the amount of enjoyment I've gotten from watching these videos that would have been a shame. Your sense of humor is super on point, and many things in the presentation remind me of Techmoan, and I've always been interested in physics of all kinds, and the practical side of optics especially was always kind of dark art. It's easy to look at formulas and do calculations, and advanced computer controlled machinery can of course do wondrous things, but that's not how optics were developed originally. Seeing someone actually talking about and going through the physical process of making something by hand down to accuracies of tens of nanometers is just damn fascinating.
This series takes the genre of ”interesting step-by-step tutorials with no chance in hell of you actually doing it yourself” to a whole new level.
We know you won’t build that cool shelf, ever, Jake. So why not fantasise about building your own non-spherical lens to view stars with?
But hey if I run out of hobby ideas in about 10 years, I'm gonna have a banger go-to idea
I thought that about his Round Spirit-Level a Year ago...
well, im grinding one right now myselfe :P
@@T1g3rch3n You go man, good luck :D
Unless you go out and start trying to build a shelf, you'll never get to the optics. Get your hands dirty!
LOL I was thinking the same thing as I watched.
Absolutely brilliant video.
I studied optical engineering in the 90s, but ended up doing mostly software. I love seeing the "small workshop" approach to manufacturing such devices.
Keep up the great work!
Oh man this is so satisfying to watch!
As a technic nerd myself, I could watch you all day.
Thank you for sharing this!
Excellent work! I helped build the DKIST telescope on Maui, then worked at SpaceX and now I run the machine shop for Space Tango making science experiments for low earth orbit. You’ve inspired me to up my game.
Amazing how much we can achieve when daring to step outside the box we put ourselves in.
As we often joked while working in wind tunnels: "this isn't rocket science -- oh, wait it actually is".
Awesome, I am currently working on a project utilizing a space tango cubelab as the mechanical Container 😃
@@NHeinz Man what a small world.
man, I don't know anything about optics and lenses but I opened your video out of curiosity because youtube recommended it to me and I listened to you carefully for 23 minutes like a child watching cartoons 🔝
Not that long ago I was involved with redesigning the baffles for a 2 degree field of view 2.5 m telescope. It's not easy to baffle a telescope with this large a field and it required a baffle around the secondary, the hole in the primary, and third "floating" baffle in between. The Baffling could have been done with just a primary and secondary baffle but this would have greatly increased the obstruction, along with other difficulties.
A light path was found that I was not initially expecting that required an addition to the primary baffle. This involved a bounce off the ID of the primary that was "shaded" by the secondary mirror, up to the secondary and down to the focal surface. It might have been a path that involved primary-secondary-primary-secondary-focus. Lots of bounces. It was a small effect but could be calculated. It was eliminated by just blocking the ID of the primary out to the diameter of the secondary, less the field of view. In your case this could probably be done by just not coating the primary all the way to the ID of the cored out area for the primary baffle. Probably such a small effect that it would never be noticed if it happens at all in your optical design.
Great work and very interesting.
Mijneer, this is fkin amazing. I had no real interest in optics or applications for any of it but i can't stop watching a true master of their art.
Huygen, I love your videos. Your type of change is what makes UA-cam and the internet such an amazing place - sharing really interesting stuff with each other. No matter the length, I’m glued to your videos. The articulation of the concepts are fantastic and the practical side is wonderful to see! Thank you for your hard work making these videos, I truly appreciate them.
I am a manufacturing engineer that knows a fair bit about metal machining but next to nothing about optics. I feel I was attacked by a tsunami of knowledge and information. I like your style! You just found a new subscriber.
I'm a chemist and I understand almost completely nothing about optics, but UA-cam just recommended this to me and it was a very interesting to watch. I'm looking forward to the next video.
My favorite is his actual measurements of Dual slit diffraction patterns in 3 dimensions. It provides intuitive insight including surprising real world subtleties. You see exactly what is happening including the lab set up even down to verifying the calibration.
I have no idea why the UA-cam algorithm sent me here, I don't know anything about glass, but that's a pretty sweet rock you made and I'm glad i got to watch you do it
Haha! Your Ultra Spherotronic dance was great!
What an absolutely spectacular series. I cannot wait for the next one
That Ultra Spherotronic came very close to cost me a new cup of coffee. And Laptop.
Well done, I much appreciated that laugh!
Can't wait for part 3. Really interesting.
First off, fantastic work, thanks for sharing this; second I had to pause the video to click “like”. RIGHT NOW for the ultra spherotronic intro section! 🤣
This is so far away from anything I would ever do but its absolutely fascinating none the less
I am not sure you realize how amazing your videos are...
Wow! The engineering and labor behind these devices continues to amaze! Great work!
15:42
And here I was nerdgasming with all the precious info, and got hit with this gem...
But seriously, I've been in love since part one, with the format full of details about something that I have only dreamt of DIY-ing. Keep up this marvelous job.
We noticed the injection of little human touches and humor, like the fish on the plastic bag shield and the DJ scene. Just shows you that science doesn't have to be sterile. Well Done!
Thank you for making youtube a great place. I love your project.
At last, my most anticipated video on UA-cam. It's great that you include the formulas. Even if I don't work through the numbers myself, the graphical representation is explained. This time, seeing just how you physically grind the correct radii was fascinating. I can't wait for the next one!
I'm honored to be able to witness this process (this is my second video watched. First one being Part-1) and in awe of your skills and technical equipment. Thanks for sharing. This is exactly what elevates UA-cam above the ordinary and makes watching it worthwhile in the long run.
Learning and expanding the Horizon. Thrilling.
i love the unexpected departure from theory to a quick improvised tool praising techno music interlude. well done :D
Everything in this series is fascinating, and I look forward to learning more about this in the next instalment! It is astonishing what dedication and knowledge can accomplish.
The sharing of Knowledge - this is why I love UA-cam.
Hello and welcome to the outskirts of the internet. Away from the mainstream, the videos here are smart, meaningful, real and insightful, perhaps something you've never even thought about, or you didn't know was possible. You have no idea how you got here, you are neither a machinist nor an astronomer, yet you will watch this video start to end. It bears a surprise. Safe travels!
Found these videos because I love astronomy and the telescopes that allow my feeble eyes and brain to see and wonder. Traditionally these kind of videos are way too technical for me. That said I’m completely fascinated by these miniature optics and this amazing artisan mixing science, maths and good old hands on skills so we all can see a little more. Thank you
you talk above my education about half the time, but you always bring it around to understanding a bit later. +1
I have no idea how I got recommended this, but your presentation style is excellent. I watched every moment.
Another amazing video in the series! Can't wait for the next one. Content that goes into the technical details and the math like this is really rare on youtube, but the amazing details are what make these videos so good.
Thank you very much for sharing your curiosity, knowledge and peculiar craftsmanship with us. Can’t wait to see new episode. 🙏🏻
Videos such as this are what make UA-cam great. Can't wait to dive deeper in the next one!
I've blown Alot of glass and also milled and turned a bunch of metal, also turned wood. Never got into machining of glass beyond being aware that lenses were ground. This level of machining is amazing!
How the hell can you process all of that info? You must be a genius. You learned all of that math, science, languages even, can even write programs! Incredible. If I could only tap into 10% of that kind of potential... Some people "got it", and others simply don't. I guess we can only play the cards we are dealt.
Excellent work, and thanks for letting us have a look through it! I am captivated by this idea of monolithic telescopes.
The knowledge, skills and craftsmanship you own just blows my mind, I salute you my kindly sir
I felt that Ultra Spherotronic introduction in my soul.
i don't speak optical wizard, but that looks like a piece of art.
This is some exquisite engineering! Thank you for sharing the genius approach to making these incredible optics!
When I left school I applied for a job as a lense grinder with a military establishment. I had no idea. This video is amazing and totally incomprehensible to me.
Absolutely wonderful. Level of accuracy and knowledge is astounding.
Impressive results, even with the aberrations! Looking forward to more
Thank you for this amazing video series! As a master's student in physics and astro, I have never been able to actually delve in to the rich practical aspects of the optics. This series is a goldmine for people like us who love to learn. Keep up amazing work mate!
The spherotronic bit was so surprising and delightful!
The Ultraspherotronic alone was worth the price of admission!
Sir. You are Very, Very Much Appreciated for generating this body of work. The design and execution is excellent. Your most outstanding skill is in the description and explanation, and in this you rank among the very finest. As an Optical Technician (retired), tasked with making spherical and toric lenses for spectacles, in extreme positive and minus, and also as an amateur telescope maker, (refractive and reflective), listening to you is just Peachy Keen!
Beautiful dance moves!! :) Excellent video as always.
I'm grinding and polishing my (very amateur) telescope mirror and was very happy to see how the mirror making process is made at a professional level.
Thank you.
This was such a great video, the merging of practical information with light hearted humor is done impeccably, I am hooked!
I was wondering how it would look with the spherical surfaces, thanks for showing! This series is so interesting, your production quality and method of teaching are also top notch imho. Looking forward to episode 3!
This really brings back memories for me. I was a lens and mirror maker in the 60s. You have a beautiful shop.
wow, just wow... I'm speechless, that's some glass magic right there - all those measurements and processing are just wild, great job!
Fantastic video! I am not at all setup for working with glass, but with a couple of CNC milling machines in my shop I now really want to try making some first surface mirrors out of aluminum... A useless project perhaps, but I'm sure I would learn a lot!
Nothing is useless if it gives you the opportunity to learn. Good luck!
Alu is doomed to unsatisfaction because of thermal expansion, and the only way to "recoat" it is by repolishing, but milling a honeycomb structure in the back of the billet would improve the stiffness/weight ratio.
After milling a parabolic surface, maybe you could grind, measure and then even polish with the CNC too with an array of custom tooling. When you perfect that, you could try the same gcode on glass.
It's definitely useful. Think about that! The main benefit of Cassegrain (exactly the Schmidt-Cassegrain solution) optics is that a long focal length can be achieved with short build. Plus imagine if all of this is made of a solid piece, how shockproof is it! It’s just a matter of size, how many areas it can be used. In kind of sensors in vibrating environment, military purposes, even in mobile phone cameras or just for even more durable telescopes or binoculars.
@@tamasau8725 I was not saying the monolithic telescope was useless, I was saying my aluminum mirror project was useless!
@@GoughCustom OK. Sorry, I misunderstood you.
15:43 SPHEROTRONIC moment caught me by surprise
It simply amazes me that there are such experts in whatever field you can think of. You knowledge is truly mind-blowing and you even make it interesting to a complete layman like me.
Just came to this channel, loved part 1 but the spherotronic dance immediately upped this channel to my top 10 😂
It is genius to add ultra sphereotronic dance into the serious educationsl video! Thank you so much! It was awsome! :D
The less parts, the better durability and cheaper production. That's honestly not only a passion project, as some would say, but a very valuable R & D project for optics, indeed like you mentioned sometimes. Very thoughtful design.
Let’s goooo!!! ULTRA SPHEROTRONIC
Such an amazing project. Thanks for bringing us along with you!
Soo much knowledge and skill, spilled out in one video. Amazing. Thanx
Phenomenal work (and dance moves)! Thank you for sharing!
That spherotronic bit was fire. Thank you for enriching our lives
This is amazing in every aspect - explaining and craftsmanship. Much respect to you, Sir.
That 90s Spherotronic edit was too funny! Thank you for taking me by surprise :D
As an optician I am very impressed. All thumbs up👍👍👍
Thank you for your clear and well-organized explanations. I was truly interested in optics and thrilled to learn about this integrated telescope lens production method.
Thank you again, and will be waiting for more educational videos.
Learning is one of the many great joys of life. Thank you for sharing
I love the ultra spherotronic gag 🤣
Jesus christ, I was *not* expecting the SPHEROTRONIC. That made my day. Really cool work, looking forward to the next part.
your videos are so well-polished
What an amazing project ! It amazes me how precise something can be made with the human hand and tools, thank you for sharing your knowledge and experience with us !
Thanks for going the extra mile and silvering the unfinished surfaces.
As a guy constantly using bought optics, I will say - you are just amazing. i am extremely astonished to see such an expertise level in a "home laboratory"
This is a true gem of content, and we are early enjoyers. Thanks!
Brilliant! Super interesting and usefull, thank you SO much for your knowledge and sharing efforts! Can't wait to see next episodes. Personally working in a precision metrology field and find your results amazing.
this is so incredible. I love how deep in the details you go. i mean you couldn't make the video more precise! It's impressive! 😁😁
Excellent video, great in-depth description of the precision required for the manufacturing process.
Amazing project. That spherotronic bit was so unexpected and hilarious you've got my sub!
The force is strong on you. thanks for the magnific video.
This is mind blowing, real engineer in action. Cool to see such content.
This guy doesn’t mess around with his hobbies
Amazing to see you making one of these. Watching the video you made with Rik really revealed the genius of the design. I have absolutely no plans of making anything like this, but seeing you making one of these objects and providing the theoretical background is truly mesmerising. Giga interessant en hopelijk hou je er een leuke kijker aan over.
I'm simply astonished, !!! I love clickspring videos for the mecanics and i think I found its optical counterpart
you bought me with spherotronic theme music.
Wow, just wow! Looking forward to the next video instalment.
Another great video! You are an excellent craftsman and teacher. Thank you.
Thanks for sharing these wonderful video's, more detailed knowledge always leads to better understanding.
Absolutely incredible work, again. Don't stop making videos. I run an astronomy Nonprofit and a couple teem members make 24in-32 inch mirrors for visual application, but this is the opposite, and fascinates me.
I just about spat coffee at the "SPHERE-O-TRONIC!!"
Awesome work, I'm loving this series...cheers.
Spherotronic got me hyped up