We are one step closer to the first replicator
Scientists have developed and tested a 3D printing technique that quickly creates entire objects as a unit, rather than building them by layers.
Here’s how it works. First, the researchers use a computer-controlled digital light projector to cast a series of 2D images through a rotating vial containing a photosensitive gel. As the vial rotates, photons entering from different angles meet at selected spots in the gel. Where they meet, their combined energy solidifies the gel. Where that meetup doesn’t occur, the photons simply pass through without altering the photosensitive material.
The approach is fast, able to create complex objects, such as a centimeter-size copy of Rodin’s famous sculpture of The Thinker in just minutes, the researchers report today in Science. It can also make 3D plastic parts around existing objects, such as a plastic handle around a metallic screwdriver shaft. The approach could also be useful for encapsulating sensitive electronics, the authors write.
If you go to the supplementary material for their paper, you can watch several videos showing this process at work, creating both the Thinker as well as a ball in a cage.
I think I have reported on this process previously, but this new paper shows a significant advance. Nonetheless, this engineering here is still very preliminary.
Scientists have developed and tested a 3D printing technique that quickly creates entire objects as a unit, rather than building them by layers.
Here’s how it works. First, the researchers use a computer-controlled digital light projector to cast a series of 2D images through a rotating vial containing a photosensitive gel. As the vial rotates, photons entering from different angles meet at selected spots in the gel. Where they meet, their combined energy solidifies the gel. Where that meetup doesn’t occur, the photons simply pass through without altering the photosensitive material.
The approach is fast, able to create complex objects, such as a centimeter-size copy of Rodin’s famous sculpture of The Thinker in just minutes, the researchers report today in Science. It can also make 3D plastic parts around existing objects, such as a plastic handle around a metallic screwdriver shaft. The approach could also be useful for encapsulating sensitive electronics, the authors write.
If you go to the supplementary material for their paper, you can watch several videos showing this process at work, creating both the Thinker as well as a ball in a cage.
I think I have reported on this process previously, but this new paper shows a significant advance. Nonetheless, this engineering here is still very preliminary.
