Making a Monolithic Telescope Part 2: Machining Glass
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- Опубликовано: 31 май 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 RUclips 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. 
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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
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 RUclips. 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.
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.
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.
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.
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!
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 🔝
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.
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.
Oh man this is so satisfying to watch!
As a technic nerd myself, I could watch you all day.
Thank you for sharing this!
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.
I'm a chemist and I understand almost completely nothing about optics, but RUclips 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 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.
This is so far away from anything I would ever do but its absolutely fascinating none the less
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.
Thank you for making youtube a great place. I love your project.
i love the unexpected departure from theory to a quick improvised tool praising techno music interlude. well done :D
I am not sure you realize how amazing your videos are...
I have no idea why the RUclips 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
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!
That Ultra Spherotronic came very close to cost me a new cup of coffee. And Laptop.
Well done, I much appreciated that laugh!
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!
The spherotronic bit was so surprising and delightful!
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!
Huygen, I love your videos. Your type of change is what makes RUclips 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.
This really brings back memories for me. I was a lens and mirror maker in the 60s. You have a beautiful shop.
That 90s Spherotronic edit was too funny! Thank you for taking me by surprise :D
15:43 SPHEROTRONIC moment caught me by surprise
The Ultraspherotronic alone was worth the price of admission!
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! 🤣
The sharing of Knowledge - this is why I love RUclips.
you talk above my education about half the time, but you always bring it around to understanding a bit later. +1
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.
As an optician I am very impressed. All thumbs up👍👍👍
The knowledge, skills and craftsmanship you own just blows my mind, I salute you my kindly sir
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
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.
That spherotronic bit was fire. Thank you for enriching our lives
I felt that Ultra Spherotronic introduction in my soul.
Thank you very much for sharing your curiosity, knowledge and peculiar craftsmanship with us. Can’t wait to see new episode. 🙏🏻
Wow! The engineering and labor behind these devices continues to amaze! Great work!
Thanks for going the extra mile and silvering the unfinished surfaces.
Learning is one of the many great joys of life. Thank you for sharing
Just came to this channel, loved part 1 but the spherotronic dance immediately upped this channel to my top 10 😂
Can't wait for part 3. Really interesting.
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.
I have no idea how I got recommended this, but your presentation style is excellent. I watched every moment.
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.
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.
Excellent work, and thanks for letting us have a look through it! I am captivated by this idea of monolithic telescopes.
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 RUclips above the ordinary and makes watching it worthwhile in the long run.
Learning and expanding the Horizon. Thrilling.
What an absolutely spectacular series. I cannot wait for the next one
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!
Videos such as this are what make RUclips great. Can't wait to dive deeper in the next one!
At last, my most anticipated video on RUclips. 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!
Showing the image produced before the aspherical contours are polished was very illuminating.
If you have accurate mounting plates, you can also start drilling on one side and then turn over and drill through from the other. Sometimes tape can help with splintering on the starting surface.
This is some exquisite engineering! Thank you for sharing the genius approach to making these incredible optics!
Phenomenal work (and dance moves)! Thank you for sharing!
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.
This is amazing in every aspect - explaining and craftsmanship. Much respect to you, Sir.
Very interesting. As a mold and die maker, it is intriguing to see how you work your way up to optical precision. The process for cutting glass is quite different. Thank you for sharing.
Absolutely wonderful. Level of accuracy and knowledge is astounding.
This is a true gem of content, and we are early enjoyers. Thanks!
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.
Haha! Your Ultra Spherotronic dance was great!
Such an amazing project. Thanks for bringing us along with you!
Soo much knowledge and skill, spilled out in one video. Amazing. Thanx
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 !
Impressive results, even with the aberrations! Looking forward to more
Very cool project. My father is a laboratory glass instrument maker so ive seen a lot of the processes and tools being used and it kid of makes me want to try this ... if only i had the time.
This was such a great video, the merging of practical information with light hearted humor is done impeccably, I am hooked!
Excellent video, great in-depth description of the precision required for the manufacturing process.
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"
The ultraspherotronic was awesome.
It is genius to add ultra sphereotronic dance into the serious educationsl video! Thank you so much! It was awsome! :D
I'm simply astonished, !!! I love clickspring videos for the mecanics and i think I found its optical counterpart
You lost me halfway with the math, but it's amazing how much work actually lies within it.
What a treasure to put this out for everyone to learn! Thank you!
your videos are so well-polished
wow, just wow... I'm speechless, that's some glass magic right there - all those measurements and processing are just wild, great job!
Jesus christ, I was *not* expecting the SPHEROTRONIC. That made my day. Really cool work, looking forward to the next part.
Hello Jeroen. RUclips offered your works for viewing. I am pleasantly surprised that optics interests the minds of people in your country (the Netherlands). Unfortunately, in our difficult times in my country it is already very difficult to continue working on the creation of optical devices. But I want to shake your hand and wish you success in further conquering the peaks.
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 don't speak optical wizard, but that looks like a piece of art.
Love the real world hands on demonstration.
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!
I worked for a company called Vickers instruments in the 90's who made microscopes, but by the time I started all the in house optics had finished and I really wanted to see how this was done. I hope you have some young apprentices that you can pass this knowledge onto, as your teaching skills are as impressive as your knowledge.
This is mind blowing, real engineer in action. Cool to see such content.
Wow, just wow! Looking forward to the next video instalment.
Thanks for sharing these wonderful video's, more detailed knowledge always leads to better understanding.
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.
Wooo! Another great instalment! 3D printing figuring-disks is so genius! I'm guessing you print moulds for the pitch? And how do you design the flower pattern for some specific asphere? No, wait don't tell me! I will wait patiently for the next video.. Party spheritrON!!
The spherotronic interlude was wild.
wow. amazing knowledge and skill..... now I have an understand how these polishes were done..... really amazing video
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!
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! 😁😁