Showing posts with label holography. Show all posts
Showing posts with label holography. Show all posts

2011-04-24

3D Imaging by Surface-Plasmon Holography

Holograms Powered By Quantum Effects Can Show True Color From Any Angle | Popular Science

A new type of hologram harnesses a quantum effect and uses ordinary light to make 3-D still images. Future 3-D displays based on this technology would have no need for 3-D glasses or special screens.

The technique is based on the behavior of free electrons on a metal surface, according to researchers at the RIKEN Institute in Japan.

Holography sharpens up - physicsworld.com


This tasty looking apple is an image of a new type of hologram developed in Japan that exploits tiny vibrations in metallic surface known as "surface plasmons". The image holds its rich natural colours even as the viewer changes their position, unlike many existing holograms on the market. For this reason, the researchers believe that their innovation could lead to new display technologies such as smart-phone screens that can project lifelike 3D images.
[...]
To see the hologram, the researchers needed to illuminate the structure with white light to generate surface plasmons in the silver film. Plasmons are coherent electron oscillations that can be thought of as a quasiparticle that couples photons and electrons. By illuminating the hologram in three distinct directions, the researchers were able to generate plasmons corresponding to the red, green and blue features of the hologram.



Plasmon - Wikipedia, the free encyclopedia

In physics, a plasmon is a quantum of plasma oscillation. The plasmon is a quasiparticlequantization of plasma oscillations just as photons and phonons are quantizations of light and mechanical vibrations, respectively. 

Surface plasmon - Wikipedia, the free encyclopedia

Surface plasmons (SPs), are coherent electron oscillations that exist at the interface betwterface (e.g. a metal-dielectric interface, such as a metal sheet in air).

Schematic representation of an electron density wave propagating along a metal - dielectric interface. The charge density oscillations and associated electromagnetic fields are called surface plasmon-polariton waves. The exponential dependence of the electromagnetic field intensity on the distance away from the interface is shown on the right. These waves can be excited very efficiently with light in the visible range of the electromagnetic spectrum.

Surface-Plasmon Holography with White-Light Illumination - forex world | forex world

Surface plasmon hologram and its color reconstruction with white-light illumination. (A) The SPP hologram is illuminated by white light at a given angle ? in high-index medium. Surface plasmons of a selected color are excited and diffracted by the SPP hologram to reconstruct the wavefront of the object. (B) Dispersion curve of the SPP hologram in reconstruction as a function of the incident angle of white light. The 3D images of red, green, and blue cranes made of paper are obtained at different angles with white-light illumination. This curve was obtained through calculations based on Fresnel’s equations. (C) Reconstruction of a color object through SPP hologram. The hologram is illuminated simultaneously with a white light in three directions at different angles  for each.

One Per Cent: Quantum effect fuels colour-fast holograms



"Currently 3D TV receivers, 3D games machines and 3D movie theatre screens create an illusion using left and right eye images reconstructed by the brain," says Kawata. "We are creating an optical field in 3D from the actual object in natural colour - there is no illusion."

He hopes their technique will feed into research on new ways to make glasses-free 3D moving picture screens, as well as making holograms look more realistic.

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2010-12-11

Zebra Imaging Holographic Prints

Holograms Moving From Science Fiction to Reality - NYTimes.com


Zebra Imaging in Austin, Tex., sells holographic prints that at first glance look much like ordinary 2-by-3-foot pieces of plastic — until an LED flashlight is shined at them. Then the patterns, burned into the plastic with high-power laser beams, come to life, said Al Wargo, chief executive. Out of the surface springs a model of a complicated building or an intricate network of pipes and mechanical equipment.

No special eyewear is required to view the holographic prints, which typically cost $1,000 to $3,000 each. The company has also demonstrated moving holographic displays in prototype at conferences, Mr. Wargo said. (It introduced color holograms in September.)

Architects are finding that hologram technology helps them to communicate with clients, lawyers and engineers.




Digital Prints

Bring Ideas to Life in Brilliant Detail

Get ideas across quickly with the help of ZScape™ digital prints. From regional terrain to architectural designs, you can now present 3D data in a true 3D format. Engage your audience and enable analysis from every angle by delivering a richer, more compelling visual experience. Inspire collaboration with brilliant, full-color images and provide your team with accurate information to communicate quickly and effectively in any setting.


This is a color hologram created with data from Google Sketchup. The model is of downtown Seattle. The building heights in this hologram get up to about 10 inches.



Engineering and Construction

Get the Big Picture Across Quickly

Zebra Imaging helps you engage project teams and personnel with rich, realistic three-dimensional presentations that enhance communication. Your construction and site plans can now feature multiple views, overlays and annotations in vivid detail — so the most complex projects can be understood faster than ever.

Hologram created from data that Net Engineering in Italy created using CADMATIC software.


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2010-11-04

Moving Holograms based on Photorefractive Polymers

Moving holograms: From science fiction to reality (w/ Video)

A team led by optical sciences professor Nasser Peyghambarian developed a new type of holographic telepresence that allows the projection of a three-dimensional, moving image without the need for special eyewear such as 3D glasses or other auxiliary devices. The technology is likely to take applications ranging from telemedicine, advertising, updatable 3D maps and entertainment to a new level.

Nasser Peyghambarian is a researcher at the University of Arizona. This is a refreshable, holographic image of an F-4 Phantom Jet created on a photorefractive polymer at the College of Optical Sciences, the University of Arizona. Credit: gargaszphotos.com/The University of Arizona

BBC News - Hologram messaging coming of age

STREAMING HOLOGRAPHIC IMAGES IN NEAR-REALTIME


  • Many different perspectives of the object or person (1) are captured on a series of cameras arranged in an arc or circle
  • That information is processed (2) and sent through a computer link. It could conceivably be sent anywhere in the world
  • The 3D holographic printing system (3) receives the information and drives the laser that writes the images on to the screen
  • The photosensitive polymer (4) will update every two seconds; a light is needed to illuminate the changing holograms


YouTube - 3D Moving Images Possible With New Hologram Technology

Traditional holograms are printed much in the same way a poster or a painting are, in that once the image is printed on a surface, it is permanent. But a technological breakthrough at the University of Arizona College of Optical Sciences has brought the possibility of full color, rewritable, holographic displays and televisions one step closer to reality.



The University of Arizona

Moving Holograms: From Science Fiction to Reality | UANews.org


"Holographic telepresence means we can record a three-dimensional image in one location and show it in another location, in real-time, anywhere in the world," said Peyghambarian, who led the research effort.

"Holographic stereography has been capable of providing excellent resolution and depth reproduction on large-scale 3D static images," the authors wrote, "but has been missing dynamic updating capability until now."

"At the heart of the system is a screen made from a novel photorefractive material, capable of refreshing holograms every two seconds, making it the first to achieve a speed that can be described as quasi-real-time," said Pierre-Alexandre Blanche, an assistant research professor in the UA College of Optical Sciences and lead author of the Nature paper.


The journal Nature featuring the UA holographic presence report on the cover. Parallax, or the ability to view the image from different perspectives, is one of the hallmarks of the new technology. (Image courtesy of Peyghambarian/Nature)

YouTube - Real-time holographic videos based on photorefractive polymers

The first part of the movie shows the rapid writing time of the 3D display system. It uses 6 nanosecond pulses at a repletion rate of 50Hz. It demonstrates that an image can be written in about 2 seconds.

The second part of the movie shows the concept of 3D telepresence. The 3D images of two of our researchers located in location A are sent via internet to another location B. Our 3D system at location B displays the two researchers. The movie is in real time and shows the speed of the entire process.



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2009-09-17

Touchable Holography

clipped from www.reuters.com
Reuters

Japan scientists create 3-D images you can touch

TOKYO (Reuters Life!) - Imagine a light switch or a book that appears only when you need it -- Japanese scientists are one step closer to making the stuff of sci-fi films into reality after creating a hologram that can also be felt.

"Up until now, holography has been for the eyes only, and if you'd try to touch it, your hand would go right through," Hiroyuki Shinoda, professor at Tokyo university and one of the developers of the technology, told Reuters.

"But now we have a technology that also adds the sensation of touch to holograms."

SIGGRAPH 2009 / Emerging Technologies:
Touchable Holography
clipped from www.youtube.com
clipped from www.youtube.com
clipped from english.ntdtv.com

Touchable holograms could be used for a wide variety of things... everything from light switches to books with each appearing when needed, and then disappearing when not.

And holograms could replace the need for making new interfaces for technology, since they could be changed without having to make a new physical product.

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Sources:
  1. Japan scientists create 3-D images you can touch | Lifestyle | Reuters
  2. Touchable Holography
  3. YouTube - Touchable Holography
  4. YouTube - Japanese Scientists Create Touchable Holograms
Related:
  1. Japanese Scientists Create Touchable Holograms – New Tang Dynasty Television
  2. Emerging Technologies | Galleries & Experiences | SIGGRAPH 2009
  3. Tokyo Scientists Create Touchable Hologram | Popular Science
  4. Touchable Holography: New projector lets you “touch” 3D objects with your hands (video)
  5. Touchable Holography? Almost. » Coolest Gadgets
  6. BBC NEWS | Technology | Ultrasound to give feel to games
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2009-08-08

Touchable Holography

clipped from www.physorg.com

Touchable Hologram Becomes Reality (w/ Video)

Touchable hologram
(PhysOrg.com) -- Researchers from the University of Tokyo have developed 3D holograms that can be touched with bare hands. Generally, holograms can't be felt because they're made only of light. But the new technology adds tactile feedback to holograms hovering in 3D space.
clipped from www.siggraph.org

Touchable Holography

This project adds tactile feedback to the hovering image in 3D free space. Tactile sensation requires contact with objects, but including a stimulator in the work space dilutes the appearance of holographic images. The Airborne Ultrasound Tactile Display solves this problem by producing tactile sensation on a user's hand without any direct contact and without diluting the quality of the holographic projection.

What is "Touchable Holography" ?

  • One Page Abstract (PDF)

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    Sources:
    Touchable Hologram Becomes Reality (w/ Video)
    Emerging Technologies | Galleries & Experiences | SIGGRAPH 2009
    Touchable Holography
    Related:
    Touchable Holograms Bring the Holodeck One Step Closer - Holodecks - io9
    Touchable Holography made possible with Wii Remotes and ultrasound – Video Games Reviews, Cheats | Geek.com
    Feeling Virtual Environments With Ultrasound - HotHardware
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    2008-11-05

    CNN’s Hologram Technology

    clipped from afp.google.com

    CNN 'beams up' virtual correspondent

    NEW YORK (AFP) — CNN viewers saw double Tuesday when the cable news giant used a hologram to "beam up" a reporter from Chicago to New York for election analysis.

    Like a character out of the science fiction movie "Star Wars," veteran political anchor Wolf Blitzer used a 3D hologram system to transport correspondent Jessica Yellin into his studio.

    clipped from uk.youtube.com
    clipped from www.usatoday.com
    Home
    Election-night news to co-star latest technology

    CNN will have 44 cameras and 20 computers in each remote location to capture 360-degree imaging data of the person being interviewed. Images are processed and projected by computers and cameras in New York. There'll also be plasma TVs in Chicago and Phoenix that will let the people being interviewed see Blitzer and other CNN correspondents. Bohrman says the network can project two different views from each city so Blitzer can appear to be in the studio with two holograms.

    Bohrman won't disclose the cost, but says, "We're on our budget for election night."


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    Related:
    AFP: CNN 'beams up' virtual correspondent
    Election-night news to co-star latest technology - USATODAY.com
    CNN debuts hologram technology to beam people in 3-D - Machinist - Salon.com
    CNN Hologram Technology May Change Web Conferencing forever
    CNN's holographic freakout begins, seems totally bizarre and unnecessary - Engadget
    CNN’s cool hologram technology also used tonight » VentureBeat
    Oliver Burkeman's Campaign Diary: CNN's hologram plan for election night interviews | World news | guardian.co.uk
    Z on TV: CNN scores early with Jessica Yellin, the hologram - Sun critic David Zurawik writes about the business, culture and craziness of television - baltimoresun.com
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