Technology offers high-speed, high-quality printing that could be useful for architecture models, fine art, exhibits and other applications
Researchers have developed a new printer that produces digital 3D holograms with an unprecedented level of detail and realistic color. The new printer could be used to make high-resolution color recreations of objects or scenes for museum displays, architectural models, fine art or advertisements that do not require glasses or special viewing aids.
“Our 15-year research project aimed to build a hologram printer with all the advantages of previous technologies while eliminating known drawbacks such as expensive lasers, slow printing speed, limited field of view and unsaturated colors,” said research team leader Yves Gentet from Ultimate Holography in France. “We accomplished this by creating the CHIMERA printer, which uses low-cost commercial lasers and high-speed printing to produce holograms with high-quality color that spans a large dynamic range.”
In The Optical Society (OSA) journal Applied Optics, the researchers describe the new printer, which creates holograms with wide fields of view and full parallax on a special photographic material they designed. Full parallax holograms reconstruct an object so that it is viewable in all directions, in this case with a field of view spanning 120 degrees.
The printer can create holograms from 3D computer generated models or from scans acquired with a dedicated scanner developed by the researchers. The high-quality holograms can even be used as masters to produce holographic copies.
Building a better printer
When developing the new hologram printer, the researchers carefully studied two previously developed holographic printer technologies to understand their advantages and drawbacks.
“The companies involved in developing the first two generations of printers eventually faced technical limitations and closed,” said Gentet. “Our small, self-funded group found that it was key to develop a highly sensitive photomaterial with a very fine grain rather than use a commercially available rigid material like previous systems.”
The CHIMERA printer uses red, green and blue low-power commercially available continuous wave lasers with shutters that adjust the exposure for each laser in a matter of milliseconds. The researchers also created a special anti-vibrating mechanical system to keep the holographic plate from moving during the recording.
Holograms are created by recording small holographic elements known as hogels, one after another using three spatial light modulators and a custom designed full-color optical printing head that enables the 120-degree parallax. After printing, the holograms are developed in chemical baths and sealed for protection.
The hogel size can be toggled between 250 and 500 microns and the printing rate adjusted from 1 to 50 hertz (Hz). For example, if a hogel size of 250 microns is used, the maximum printing speed is 50 Hz. At this speed it would take 11 hours to print a hologram measuring 30 by 40 centimeters, about half of the time it would take using previous systems based on pulsed lasers.
High brightness and clarity
The researchers used the new technology to print holograms that measured up to 60 by 80 centimeters showing various color objects including toys, a butterfly and a museum object.
“The new system offers a much wider field of view, higher resolution and noticeably better color rendition and dynamic range than previous systems,” said Gentet. “The full-color holographic material we developed provides improved brightness and clarity while the low-power, continuous wave lasers make the system easy to use.”
The researchers say that as technology improves, especially 3D software, it may be possible to expand their hologram printing approach to medical or other advanced applications.
The Latest on: Holograms
via Google News
The Latest on: Holograms
- Microsoft: HoloLens To Change The World - And Make Tons Of Moneyon November 29, 2019 at 6:34 am
Part of the article goes this way (my emphasis): For HoloLens 2, Kipman and his team invented tiny mirrors that vibrate 12,000 times per second, generating holograms twice as wide as before. They ...
- The 2019 EMS World Innovation Award Winnerson November 29, 2019 at 1:16 am
This unprecedented simulation-based training experience allows learners to interact and move freely within a clinical training environment that is augmented with holograms. JUDGES’ FEEDBACK: “The ...
- Going Cruelty-Free: German Circus Use Animated Holograms Instead of Live Animalson November 27, 2019 at 10:08 pm
Apparently, still very much a circus – only without the devastating cruel trade practices. Circus Roncalli, a circus based in Germany, uses 3D holograms of animals for its shows, in a bid to put an ...
- Sound waves, Robobees and Climate Changeon November 27, 2019 at 12:17 pm
Move it fast enough, give it some mood lighting, and you can create what seem like solid, beautiful, floating structures called volumetric displays. Not holograms. This isn’t actually the first time ...
- Hologram-like device brings objects to life with ultrasound waveson November 27, 2019 at 7:56 am
A team of researchers at the University of Sussex have created a multimodal acoustic trap display (MATD) that creates 3D floating and animated images that can produce sound, visual and tactile (touch) ...
- Circus Roncalli: This German Circus Uses Holograms Instead Of Live Animals To Prevent Animal Crueltyon November 21, 2019 at 9:04 pm
Circuses are known for keeping animals in captivity, keeping them away from their natural habitat, but the Circus Roncalli is different. Circus Roncalli uses holograms for projections and acts for ...
- Fighting fire with tech: How holograms, AI and drones can aid bushfire preventionon November 20, 2019 at 2:24 am
Photogrammetric artificial intelligence can produce reliable information about physical environments by processing captured imagery. It integrates these videos to create live holograms in real time.
- Inventor Alex Kipman’s Grand Vision for How Holograms Will Change Our Liveson November 18, 2019 at 7:00 pm
In under two minutes I’ve completed the repair. The sensation is bizarre, like living in a world of Harry Potter magic. I can even touch the holograms. While I’m doing another repair job, a virtual ...
- It Is Now Possible To Touch Hologramson November 18, 2019 at 3:00 am
It is no longer science fiction. Researchers at the University of Sussex claim to have developed the very first tactile hologram. In an article published in the Nature journal on November 13th, they ...
- In A Rock 'N' Roll Dream, Roy Orbison And Buddy Holly Take The Stage Again (As Holograms)on November 18, 2019 at 2:08 am
His professional career lasted all of 18 months. So, how’d it shake down at the Shubert with the holograms? "Creepy" certainly hovered at the onset, but dissipated and mutated into something else ...
via Bing News