Amazing as everything about the ELT! The giant relying on the nanoscale precision - a great example of how everything work in the Universe! I wish patience to coating engineers team - truly arduous task is ahead!
Incrível a minúcia e cuidado...o engenho e arte para ver o reflexo mágico, a prata para moldar de forma nítida e mais brilhante que nunca e vamos sorrir! Que história épica ...mais uma etapa de algo maravilhoso e extraordinário do ELT!!
I used to work in a microelectronics wafer fab, my job included the process of coating the wafers with thin layers of alloys of Al/Si that will provide the electrical connections. I’m very surprised at the little attention paid in the video to the substrate cleaning process, because I remember the trouble caused by any trace of contaminants, especially organic compounds, which were thoroughly removed with acids baths followed by an extensive rinsing and drying process. I guess you used a sputtering type of deposition, I’m really curious about who built your coating tool.
@@ESOobservatoryMore importantly it is one of if not the last step in training the next generation of graduates in the field to produce what they have specialized into as their educational career progressed. With that being said we can slow down the pipeline now that we have JWST and LHC focusing on replacement and a telescope for 75 years from now 😊
@@ValidatingUsername Nah melting through 3,5 km of ice takes longer than 75 years, even at more than 4°. Still some time to gather neutrino data. ua-cam.com/video/Fi0q0O4V5Qs/v-deo.htmlsi=nd51333zCbRcaqla
Close to LA, ca. is the Mojave Desert where I ride my dirt bike. Can get blowing there with dust. I hope that mountain in Chile does not have the same problem with dust.
With the amount of mirrors this telescope will need, I think it can be safely considered a literal factory for mass production(and not some manufacturing site for a one off very specific thing). Out of curiosity what is the goal(it seems to currently still be in development so it will probably change) for time needed to make a single mirror?
Just to clarify, the facility shown in this video is just for the coating and maintenance of the segments. The segments themselves are manufactured in Europe. The blanks are made by SCHOTT in Germany; all of them have been cast already. They're then sent to Safran Reosc in France, where they're polished and integrated with their mechanical supports, made by VDL ETG Projects B.V. in the Netherlands. The production rate at Safran is 5 segments per week, and to achieve this they had indeed to develop a specific workflow to deal with so many segments.
@@ESOobservatory Thank you for a clarification with detail. Are all segments in the meaning of completing the main mirror or completing the main mirror and also replacements for the future? I'm assuming so far there isn't exact info on amount of time that will be needed to polish them.
In total there are 949 segments: 798 will be present in the main mirror at any given time, 133 extra segments are needed for recoating (every day we'll remove two segments from the mirror and replace them with two recoated ones), and there are 18 spares. All 949 blanks have been cast already. These blanks are being polished and integrated with their supports at a rate of 5 per week.
When it is time to recoat the mirrors, do they all have to be coated at the same time or can the telescope be operated with a combination of new and old segments?
Good question! In addition to the 798 segments of the mirror, there are 133 extra ones that will be used to facilitate the recoating. Every day we'll remove two segments from the mirror and replace them with already coated ones. The reason we need so many extra segments instead of just a few is that they all have slightly different shapes, depending on where they are within the mirror. The mirror can be divided into six sectors or petals, each one with 133 segments. Those 133 segments are all different from each other, but identical to those in the other petals, due to the symmetry of the mirror. So with 133 extra segments we're fully covered for the recoating.
There are different companies involved. The blanks are made of Zerodur, and they're cast by SCHOTT in Germany. They're later polished by Safran Reosc in France. At Safran they also install the blanks on supports manufactured by VDL ETG Projects B.V. in the Netherlands. Once ESO verifies that the segments are ok they're shipped to Chile, where we coat them with silver following the workflow explained in this video.
The level of technology and engineering behind this telescope is amazing. I can't wait to see how much, and what kind of science it can produce.
The world needs to cooperate more!
yes this
Amazing as everything about the ELT! The giant relying on the nanoscale precision - a great example of how everything work in the Universe! I wish patience to coating engineers team - truly arduous task is ahead!
Just incredibly innovative. The painstaking dedicated to producing these perfect segments. All the hats off to these ladies and gentlemen.. 🎩
Incrível a minúcia e cuidado...o engenho e arte para ver o reflexo mágico, a prata para moldar de forma nítida e mais brilhante que nunca e vamos sorrir! Que história épica ...mais uma etapa de algo maravilhoso e extraordinário do ELT!!
Looking forward to see what this beastie can do.
I used to work in a microelectronics wafer fab, my job included the process of coating the wafers with thin layers of alloys of Al/Si that will provide the electrical connections. I’m very surprised at the little attention paid in the video to the substrate cleaning process, because I remember the trouble caused by any trace of contaminants, especially organic compounds, which were thoroughly removed with acids baths followed by an extensive rinsing and drying process. I guess you used a sputtering type of deposition, I’m really curious about who built your coating tool.
Yes looked like magnetron sputtering to me
La beauté de la science en action.
This is what happens when humans work together for the betterment of the world.
Yes! It takes a lot people with very different backgrounds and a lot of dedication to make something like this happen.
@@ESOobservatoryMore importantly it is one of if not the last step in training the next generation of graduates in the field to produce what they have specialized into as their educational career progressed.
With that being said we can slow down the pipeline now that we have JWST and LHC focusing on replacement and a telescope for 75 years from now 😊
@@ValidatingUsername 75 years? Then I am hoping for a 1 km^2 telescope on the dark side of the Moon :D
@@meltdown6165 before or after Antarctica is completely melted and inhabited?
@@ValidatingUsername Nah melting through 3,5 km of ice takes longer than 75 years, even at more than 4°. Still some time to gather neutrino data. ua-cam.com/video/Fi0q0O4V5Qs/v-deo.htmlsi=nd51333zCbRcaqla
Close to LA, ca. is the Mojave Desert where I ride my dirt bike. Can get blowing there with dust. I hope that mountain in Chile does not have the same problem with dust.
When imaging, are all segments adjusted in real-time? Is there a web pointer for details how the surface shape control system works?
My 28" mirror needs recoating. It would be good to know someone working the nightshift there, I might be able to get it done for a carton.
केव्हा पहिले छायाचित्र बघायला मिळेल असे झाले आहे. खुप खुप शुभेच्छा. दुर्बीण लवकर तयार व्हावी.
Hi! First light is currently planned for 2028.
Picometer coating layers, wild.
will it be another step in our understanding exciting times
With the amount of mirrors this telescope will need, I think it can be safely considered a literal factory for mass production(and not some manufacturing site for a one off very specific thing). Out of curiosity what is the goal(it seems to currently still be in development so it will probably change) for time needed to make a single mirror?
Just to clarify, the facility shown in this video is just for the coating and maintenance of the segments. The segments themselves are manufactured in Europe. The blanks are made by SCHOTT in Germany; all of them have been cast already. They're then sent to Safran Reosc in France, where they're polished and integrated with their mechanical supports, made by VDL ETG Projects B.V. in the Netherlands. The production rate at Safran is 5 segments per week, and to achieve this they had indeed to develop a specific workflow to deal with so many segments.
@@ESOobservatory Thank you for a clarification with detail. Are all segments in the meaning of completing the main mirror or completing the main mirror and also replacements for the future?
I'm assuming so far there isn't exact info on amount of time that will be needed to polish them.
In total there are 949 segments: 798 will be present in the main mirror at any given time, 133 extra segments are needed for recoating (every day we'll remove two segments from the mirror and replace them with two recoated ones), and there are 18 spares. All 949 blanks have been cast already. These blanks are being polished and integrated with their supports at a rate of 5 per week.
When it is time to recoat the mirrors, do they all have to be coated at the same time or can the telescope be operated with a combination of new and old segments?
Good question! In addition to the 798 segments of the mirror, there are 133 extra ones that will be used to facilitate the recoating. Every day we'll remove two segments from the mirror and replace them with already coated ones. The reason we need so many extra segments instead of just a few is that they all have slightly different shapes, depending on where they are within the mirror. The mirror can be divided into six sectors or petals, each one with 133 segments. Those 133 segments are all different from each other, but identical to those in the other petals, due to the symmetry of the mirror. So with 133 extra segments we're fully covered for the recoating.
@@ESOobservatory Thanks for the detailed answer! 🥰
Zeiss makes these?
There are different companies involved. The blanks are made of Zerodur, and they're cast by SCHOTT in Germany. They're later polished by Safran Reosc in France. At Safran they also install the blanks on supports manufactured by VDL ETG Projects B.V. in the Netherlands. Once ESO verifies that the segments are ok they're shipped to Chile, where we coat them with silver following the workflow explained in this video.
@@ESOobservatory thank you for this detailed answer! I am fascinated how far engineering has pushed the envelope.
3.14 km (Pie) diameter space telescope ????
How in the name of George Dubya did they not name this thing the BFT? Totally missed out on a great marketing op.
Wishing we did more of this and less self-centered, short-term, egotistical greed.
💜🎵💜
there are a lot of smart people out there.
👍💪✌
"Half a nanometer" 🤯
well... thats a big mirror