3D printers are very useful devices, and there are many reasons to support them, but most devices have a key weakness: they take a long time to actually make anything. This is because additive manufacturing usually only produces one microscopic layer at a time, which in turn forms an object. However, there is now a new holographic printing technology that creates a complete object in one to two seconds.
Light-based 3D printing technology typically uses a laser to condense a layer of resin into a shape, but like a squeeze printer, this printing must be done in layers. If the laser shines through the liquid resin, it creates a large line that needs to be cured.
But if you use a weaker laser to illuminate the resin, unless they all intersect, aren't these lasers sufficient to cure them? This is a technology developed by a team led by researchers at Lawrence Livermore National Laboratory.
This basic idea has been applied in several other areas: by carefully superimposing weak beams, sounds or radiation, you can expose selected volumetric critical masses to these substances while leaving other areas essentially unaffected.
In this case, the three beams must be carefully patterned, intersecting only between the three, and creating constructive intervention at the exact point where curing is required. And once the mode is set, the process of curing the resin actually takes only a few seconds - when the object falls out, the things you print can be used. Other technologies have tried similarly, but have not yet created such a complete 3D shape.
The graphic on this paper shows the lens and holographic settings, as well as several examples of shapes printed using this technique.
The advantages of this technology are many: for example, you can produce things with other structures that allow them to move freely inside, such as gears in the gearbox. The support structure is no longer needed under the overhanging portion, so certain shapes that were previously impossible to print from the bottom up or from the top down can be created directly in this way. You can also quickly print multiple structures at the same time—for example, a bunch of dice.
Compared to most commercial 3D printers, this technology is still somewhat rough, but it is also expected - this is actually just a proof of concept in the lab.
Lead researcher Maxim Shusteff said in an e-mail, "This work has given us a solid first step in this area, demonstrating and demonstrating that 'in one go' 3D manufacturing is entirely possible. So, we The maximum (speed, build size, resolution, complexity) of any build performance metrics has not yet been developed."
Ultimately, "resolution" may depend on the smallest resin that can be cured, which is related to many chemical and optical factors. It is still too early to judge the resolution, but from the results obtained, it seems obvious that this technology can certainly be applied to the existing complexity of 3D printers.
There is still a long way to go before this technology can be used for commercial applications, but it's not hard to imagine that people would want 3D printers to create something to print in seconds instead of spending at least a few minutes or more. .
(Editor)
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