Why This 3D Light Printer Is a HUGE Game Changer

Why This 3D Light Printer Is a HUGE Game Changer

By just using rays of light, this new 3D printer
“sculpts” objects all at once, making it one of the first designs of its kind. This latest method coming from UC Berkeley and Lawrence Livermore National Lab is called Computed Axial Lithography, or CAL for short. It uses a newer technique called volumetric
printing. HAYDEN TAYLOR: Volumetric printing is a category
of additive manufacturing, where all points inside the 3D objects are materialized or
created pretty much Simultaneously, as opposed to building up
the geometry, layer by layer, which is how virtually every other existing additive manufacturing
process works today. So CAL is printing smooth complex geometries
like those found in the statue The Thinker; there are no symmetrical sides and no hard
“staircase” looking edges, which is totally novel! Another promising feature of this device is
called “overprinting” which is when they can take objects and print around them.Like
taking the metal component of a screwdriver and printing the handle. This is a technique that our additive manufacturing
printers today, have trouble accomplishing. You see, even other liquid printers, like
those that use Stereolithography, are not considered volumetric. Although Stereolithography printers also use
a bath of resin, they’re still printing objects layer by layer, slowing pulling the
object out and selectivity curing sections with a light in a process called photopolymerization. Researchers for CAL eliminated this long process. Since CAL can print within minutes and is
special since it can print all at once too, and it’s still a very new technology. HAYDEN TAYLOR: Computed axial lithography,
you mean? The merging of the relative rotation to build
up.a 3D intensity dose with fabrication. This is the first demonstration of that approach. The original proof of principle was done in
2017 by a big collaboration between the Lawrence Livermore National Lab, MIT, UC Berkeley, and University
of Rochester. They used three intersecting stationary beams,
and at the points they intersected, the intensity of light was high enough to cause the resin
to solidify. But this early project was limited by simple
shapes. So Hayden and the team wanted to create something
with some versatility and curves. HAYDEN TAYLOR: The principle of the CT scan,
the computed tomography scan, came to mind. We thought, “Well, let’s just reverse that
to create objects instead of measuring them. By calculating what an image would look like
from many different angles, researchers put the resulting images into a DLP, or “digital
light processing” projector. (Sounds fancy, but it’s really just an ordinary
digital projector from a store.) From there they pointed the projector at a
light-sensitive resin. HAYDEN TAYLOR: And so, as that volume of material
rotates quite steadily, the pattern that is being projected into the volume is changing
there are rays of light that are controlled in the brightness, and as they shined through,
photons are getting absorbed out of that beam at a particular rate. When that amount of absorbed light energy
goes above a certain threshold value, the resin will become solid and then the part
is formed. So a key part of this whole process is this
resin. It’s a synthetic material called gelatin
methacrylate hydrogel and it’s made of a few components; liquid polymers (which have
acrylate at the ends), photoinitiators (which are molecules that react to photons), and
oxygen. The researchers keep the gel at room temperature
so the oxygen can evenly distribute. But when a light is shined into the material,
the molecules within the photoinitiators become reactive and a few things can happen. HAYDEN TAYLOR: First, they could interact
with the oxygen and become what is called quenched. So, the reactive molecule stops being reactive
and is basically dead. When I say that there’s a threshold for light,
it’s really the presence of the oxygen that creates this sharp threshold. You’ve got to consume the oxygen before you
could do the solidification. This threshold process is extremely important
because technically, those rays of light are going through the entire resin, even the parts
you don’t have to solidify. The acrylate in the polymers goes through
what’s called polymerization, which is when resin molecules link together in chains to
make a solid plastic. And within a few minutes, the researchers
have a solid small structure like that of The Thinker. The resin is a flexible material to work with
because it’s cheap, malleable, and reusable.# We can possibly customize sports equipment,
tools, lenses, or even prosthetic devices. But to go beyond the centimeter scale the
researchers are at now, they need to evaluate the resin formula. AND what about biocompatibility? HAYDEN TAYLOR: Wow, that is a really excellent
question, and actually, the subject of our ongoing research. We know that other research groups have successfully
used gelatin methacrylate in conjunction with cells in vitro. That’s a huge positive sign for us. So while this is the latest and breaking research,
it’s probably only going to get better from here on out. So How much do you know about 3D printers? Does this project excite you? Let us know down in the comments below and
if you liked this project, check out this video. And don’t forget to subscribe to Seeker for all your material
science updates and I’ll see you next time.

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  1. that's really fast, needs more furnishing, the resin can be then put in a mold then fill with some kind of metal

  2. Not to diminish the revolutionary breakthrough of this process but… she (the commentator) would look much better with short hair; that of course dictated by the shape of her face

  3. Ну все, вот и материализация подкатила. Ближе на шаг к создателю.

  4. No one gonna talk about the poor quality of each of those prints?

    They look melted.

    I'll stick with functional 3D printing for now

  5. I predicted this in 2014 when I first was thinking about applications about reflecting beams around tubes. If you create a spiraling cross section throughout the tube and have beams from other angles and in those cross sections their properties combined change the state of the particles.

  6. bullccrap, guys this is just resin, most people are alergic to resin, its brittle and toxic, its not very evironment frendly and what are you going to use it for exactly? stop improving already existing technologies, invent something new please

  7. Slowly catching up to how the Tartary's, This is how they probably made all the amazing buildings & ceilings! They defo didn't make them with a hammer & chisel!.. lol

  8. would this ever be possible with metal, it seems the light sensistivity of the material is going to be the biggest hurdle for the adoption of this

  9. IMHO, better to rotate the light source around the object. There is centrifugal force on the object on the current prototype. Even by a small amount will still be a huge factor in improving accuracy.

  10. typical gyno minded garbage review. stupid gyno fails to inform about the fact that the special resin needed to make this 'tech' work is useless in real world applications. at least the 3d printers available today can use several(to many) different types of materials that are useful in real world applications. face it kids, the gyno mind is incapable of science. her deceitful use of excitement about something that doesn't really exit and has zero real world use or value is typical garbage hype. to bad she has no idea about being honest or knowledgeable about the topic she is presenting.

    seeker is a garbage science channel. blocked and reported. FAKE SCIENCE.

  11. Extremal exciting!

    Imagine a surgeon pulling a broken bone from a person on an operating table.
    Giving it to a technician who scans the broken bone. And prints a replacement part on minutes.
    The part is the fixed back into the patient and stiched up.

    So a patient ends up only to have ONE operation instead of multiple operations to fix a broken or shattered bone due to an accident.

    Yes. It's an amazing technology if it really can work like that.

  12. That's really exciting. I can imagine with AI and improved scanning and projecting of photons, various intricate shapes can easily be manufactured. Great project!

  13. How practical would this technology be in 20 years to say…3D print Gold on an industrial scale?

  14. Patterns and structural shapes are fascinating, but when do we get a chemical molecular printer that can produce medicines and the like on demand? Or is it that we do already

  15. If this is getting released to the public, something way better is in the works or is blatant misdirection.

    Like using quantum physics to create matter seemingly out of thin air.
    Quantum physics is what you should be watching!

  16. I think the best way to make a replicator would be to electro magnetically control material like they can do with ink in less than a second to produce a 3D object. Like an LED display controls images.

  17. Instead of using just one projector, more than one projector at slightly different wavelengths could be used. That way the light from one would not be enough to cure the resin, but when multiple hit it at the same time it could setup and cure the part. This is not exactly new as was mentioned, as it has been done in the past were the light is focused onto different points. The places where it is focused are were the resin will setup. One problem with people saying something is new is most of the time it is not new, just new to them. Most everything has been done at some point in time, but the details have been lost or all of the people involved are long dead. Not everything that appears new is actually new. Electric cars been around more than 100 years, and is safer than starting one with a crank. Yet today if someone were to see something new looking with a crank they would think that it is new. This applies to all fields, and just because there is no documentation on something does not mean someone else has not tried it in the past. If there are no records of something being tried in the past anywhere, you can take the old idea and get a patent on it, just has to be unlike similar things that the Patent office has not seen before. Man has been here more than 300,000 years and it has only been in the last hundred or so years that things have been recorded. In addition records of things do get destroyed over time. So it is possible that some project that someone created a few years ago that the creator died, his ideas could be used and none would be the wiser.

  18. Whoa whoa slow down, did you say polymerization? We are finally one step closer to creating blue-eyes ultimate dragon!

  19. What does that say about our world today that the scientists are worried about "open source" sharing because they are worried abou how life saving technology might be used for nefarious purposes. ……very sad.

  20. i call bs how is this device suppost to account for refraction and how is it suppost to deal with light polution, its a cool idear but i dobut itll be makeing any breaktroughs any time soon

  21. Does it have to be yellow, though? X3
    I kid, I kid… this is freakin' amazing.What kind of resolution could you get? Like, microscopic scale? 
    If basic microscopes can magnify vision a few hundred times, could you print using microscopic light beams?
    Can you print around an object? eg; put a circuitboard+electronics+battery in there, then print a housing around it. Or like; put in a pair of eyeglass lenses, then print the frames so you can wear them.

  22. Magnetize 3-D option Body repair With T CDS Formula educated Train of motion picture Button Magnetic beds A refrigerator that tells you how to eat and will not open up unless it has the And take Order from your refrigerator

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