3D Printer Uses Light to Shape Objects, Transform Product Design

Research: The technology has potential to transform how products from prosthetics to eyeglass lenses are designed and manufactured —

Research: The technology has potential to transform how products from prosthetics to eyeglass lenses are designed and manufactured —

Light-based techniques 3D printing, i.e, Digital Light Processing (DLP) and Stereolithography (SLA), build up 3D objects layer by layer. The system, which the scientists have nicknamed the "replicator" in honor of the futuristic tech of Star Trek, is capable of creating incredibly smooth, flexible objects that just aren't possible with regular 3D printing. Using a 3D model of the object to be replicated, a computer tells the projector what patterns to beam onto the cylinder as the container rotates.

The researchers claimed to have reversed the principle of CT scans, which project X-rays or other types of electromagnetic radiation into the human body from different angles.

The "Replicator" 3D printer. The projection is calculated at each angle, researchers run an optimization algorithm and the result is a series of images that appears as a rotating video projection that can be played at a rate adjusted to the rotation of the resin vial.

"Our process enables us to construct components that encase other pre-existing solid objects, allowing for multi-material fabrication".

"The liquid that you don't want to cure is certainly having rays of light pass through it, so there needs to be a threshold of light exposure for this transition from liquid to solid", Taylor said.

The 3D-printing resin is composed of liquid polymers mixed with photosensitive molecules and dissolved oxygen.

Researchers from the University of California (UC), Berkeley have developed a 3D printer which projects CT scans onto a rotating volume of photosensitive resin.

Astros sign Miley to one-year deal
Miley spent last season with the Milwaukee Brewers , going 5-2 with an earned-run average of 2.57 over 16 starts. He missed the first five weeks of 2018 with a groin injury, and another two months with an oblique strain.

Those links are the key to the transformation, turning the liquid into a solid. The unused resin can be recycled and used at another time.

Taylor and the team used the printer to create a series of objects, from a tiny model of Rodin's "The Thinker" statue to a customized jawbone model. The printer is now limited to producing objects within a diameter of 4 inches (10.16 centimeters) and doesn't produce any waste - the goo can be reused in subsequent prints.

"Our technique generates nearly no material waste and the uncured material is 100 percent reusable", said Hossein Heidari, a graduate student in Taylor's lab at UC Berkeley and co-first author of the work.

This approach can print structures that are hard or impossible to make with regular 3D printers: overhanging features, disconnected parts - like a ball in a cage - and encased pre-existing items. According to the researchers, led by Hayden Taylor, assistant professor of mechanical engineering at Berkeley, all of these properties suggest that their printer could make anything from prosthetics to eyeglass lenses - all while capturing very fine details.

The "replicator" can also print over an existing object - such as the handle onto a metal screwdriver shaft. For instance, the team placed a screwdriver shaft within the resin, then used their printer to fabricate a handle.

"I think this is a route to being able to mass-customize objects even more, whether they are prosthetics or running shoes", said Taylor.

Recommended News

  • No 10 hits out at EU's claim Gibraltar is a British colony

    No 10 hits out at EU's claim Gibraltar is a British colony

    In a 2002 referendum on whether Britain and Spain should share sovereignty over Gibraltar, 99 percent of voters said no. The agreement applies whether the United Kingdom leaves the European Union with a so-called Brexit deal or not.
    Piyush Goyal skirts jobs debate but points at ‘gains’

    Piyush Goyal skirts jobs debate but points at ‘gains’

    He said the country had made rapid progress in helping ordinary citizens get access to air travel. "Today, under Make in India , mobile and parts manufacturing companies have increased from 2 to more than 268 providing huge job opportunities", he added.
    New BMW 7 Series plug in hybrid models revealed

    New BMW 7 Series plug in hybrid models revealed

    The engine kicks-in only on speeds beyond this figure or if the system senses that the auto is carrying a heavier-than-usual load. Sales for the plug-in model start in the Spring, with the 745e costing £76,815 and the 745Le xDrive starting from £83,560.
  • BP to expand emissions disclosure on oil investments

    BP to expand emissions disclosure on oil investments

    The company will set climate targets related to its own operations, and it will publish an annual review of its progress. The two sides disagreed on whether the company had shown it was consistent with the goals of the climate accord.
    Overwatch New Assault Map Paris Goes Live On The PTR

    Overwatch New Assault Map Paris Goes Live On The PTR

    Depending on what side of the fence you are put on, you'll be tasked with either attacking or defending points on the map. However, maps typically enjoy a good month or so on the test servers before they are rolled out to the public.
    Bohemian Rhapsody’s Rami Malek says working with Bryan Singer was ‘not pleasant’

    Bohemian Rhapsody’s Rami Malek says working with Bryan Singer was ‘not pleasant’

    He added - reportedly whilst visibly emotional: "For anyone who is seeking any solace in all of this, Bryan Singer was sacked ". Bryan Singer was sacked , I don't think that was something anyone saw coming but I think that had to happen and it did'.
  • Lionel Messi's 20-Yard Curling Strike Literally Came Out Of Nowhere

    Lionel Messi's 20-Yard Curling Strike Literally Came Out Of Nowhere

    Barca received a penalty of their own soon after when Nelson Semedo was adjudged to have been brought down by Antonio Latorre. But Atletico Madrid , now six points behind, can close the gap when they take on Real Betis on Sunday.
    Honda Gives NSX, Civic Type R the Midas Touch

    Honda Gives NSX, Civic Type R the Midas Touch

    Toscano. "I mean, who has ever seen a golden lawn mower or generator before", he says. They also have special badging and satin black accents.
    Queensland hit by flooding even as Australia sizzles

    Queensland hit by flooding even as Australia sizzles

    A dam has reached twice its capacity and water is being released to avoid putting further strain on it. More than half a metre of rain has been dumped on Ingham in the past 12 hours.
  • Arsenal eyeing Adrien Rabiot on free transfer: Unai Emery wants deal

    Arsenal eyeing Adrien Rabiot on free transfer: Unai Emery wants deal

    At PSG, he has split goalkeeping duties with Alphonse Areola, who was part of the France squad that won the World Cup last summer. Goalkeeper Gianluigi Buffon said on Saturday that he wants "to stay another season" at Paris Saint-Germain.
    John Lynch misses out on Pro Football Hall of Fame

    John Lynch misses out on Pro Football Hall of Fame

    Broncos owner Pat Bowlen and former Cowboys vice president of player personnel Gil Brandt were elected as contributors. Bowlen joined those ranks after three-plus decades of contributions to the National Football League and the Broncos.
    Egypt mummies: New tombs found in Minya

    Egypt mummies: New tombs found in Minya

    Fifty mummies in a good state of preservation were found within four Ptolemaic burial chambers, which appear to be family tombs. Egyptian archaeologists have uncovered an ancient burial site containing 50 mummies dating back to the Ptolemaic era.

We are pleased to provide this opportunity to share information, experiences and observations about what's in the news.
Some of the comments may be reprinted elsewhere in the site or in the newspaper.
Thank you for taking the time to offer your thoughts.