Skip navigation.

Random Accesses

Dispatches from the bleeding edge

Posts tagged with "holography"

100 DVDs on one disc within three years?

, , , ...

Researchers at General Electric claim to have made a key breakthrough in optical data storage that could lead to commercial discs holding the equivalent of 100 DVDs within three years. The new technology is based on the physics of holograms, which enable information to be packed far more densely than with established recording formats. A new device will be needed to play these discs but this will be compatible with established formats like CDs, DVDs and Blu-ray discs, say the US-based team.

Invented over 50 years ago, holograms are now widely deployed as authentication tags, and can be found everywhere from credit cards and passports to cosmetics and pharmaceuticals. These futuristic surfaces can be generated in photosensitive materials by applying two coherent light beams: an “object” beam carrying information about a material’s structure; and a reference beam that records the desired pattern on the hologram. The resulting 3D interference pattern is usually stored as changes in refractive index of the recording material, which can be viewed when the material is illuminated by daylight.

Source: http://physicsworld.com/cws/article/news/39565

Holographic television to become reality

, , , ...

Picture this: you're sat down for the Football World Cup final, or a long-awaited sequel to the "Sex and the City" movie and you're watching all the action unfold in 3-D on your coffee table.

The reason for renewed optimism in three-dimensional technology is a breakthrough in rewritable and erasable holographic systems made earlier this year by researchers at the University of Arizona.

Dr Nasser Peyghambarian, chair of photonics and lasers at the university's Optical Sciences department, told CNN that scientists have broken a barrier by making the first updatable three-dimensional displays with memory.

"This is a prerequisite for any type of moving holographic technology. The way it works presently is not suitable for 3-D images," he said.

Source: http://www.cnn.com/2008/TECH/science/10/06/holographic.television/index.html

Holographic storage ships next month!

, , ,

Even since astronaut Dave Bowman disconnected the HAL 9000’s holographic memory in 2001: A Space Odyssey techies have been wondering when we could buy real holographic storage. Now we know: May, 2008.

Promising super-high density and excellent media flaw resistance, holographic storage has been an ever-receeding technology for years. You can buy nifty 3D skull and crossbones holograms - technically a form of storage - but no one had figured out how to turn a lab project into a product. Until now.

Source: http://blogs.zdnet.com/storage/?p=313

3-D imaging with FINCH

, , ,

Holography offers a way of creating complete 3-D images of samples, but requires mechanical scanning of laser beams. But two researchers have invented a new technology called FINCH (short for ‘Fresnel incoherent correlation holography.’

According to them, FINCH can make 3-D imaging quicker and more accurate. Their FINCHSCOPE, a 3-D microscope, promises to capture high-resolution 3-D fluorescent images of biological specimens without the need for any moving parts. It could be used in medical applications such as endoscopy, CT scanning or X-ray imaging, but also for security screening or 3-D movies.

Source: http://blogs.zdnet.com/emergingtech/?p=841

360-Degree Holographic Display

, , , ...

Researchers from the University of Southern California (USC) Institute for Creative Technologies developed a 360-degree holographic display, that projects three-dimensional images that can be seen from any angle at a reasonable distance. The researchers used a set of rendering techniques for their autostereoscopic light field display.

The holographic display system uses a standard programmable graphics' card to render over 5,000 images of interactive 3D graphics per second, projecting images to 360°-degrees with 1.25° degree separation and up to 20 updates per second. The images are projected onto a spinning anisotropic reflector and a motion-tracked vertical parallax is used to support 3D movements with perspective-correct geometric cues.

The USC team demonstrated this technique with interactive raster graphics using a tracking system to measure the viewer's height and distance from the projected images.

Source: http://www.tfot.info/news/1025/360-degree-holographic-display.html

Rewritable Holographic Memory

, , , ...

By using lasers to etch data onto fragments of a microbial protein, researchers at the University of Connecticut may have demonstrated a way to produce rewritable holographic memory. Holographic memory stores data in three dimensions instead of two and could make data retrieval hundreds of times faster. The first holographic-memory systems have recently come to market, but they do not yet feature discs rewritable in real time.

Researchers at the University of Connecticut, Storrs, led by Jeffrey Stuart, head of the university's Nanobionics Research Center, based their holographic storage system on reengineered versions of proteins produced by bacteria-like organisms commonly found in salt marshes. Simply shining blue light on the proteins erases any data stored in them.

The technology exploits an evolutionary adaptation of the microbe Halobacterium salinarum, which produces a light-sensitive membrane protein when concentrations of oxygen get too low. The protein, known as bacteriorhodopsin, helps the organism convert sunlight into energy. After the protein absorbs light, it cycles through a series of chemical states, releases a proton, and finally resets itself.

Source: http://www.technologyreview.com/Infotech/19228/?a=f

SeeReal Hi-Res Holographic Display

, , , ...

German company SeeReal demonstrated a new holographic display at the SID 2007.

The holographic display prototype uses a 20 inch display that displays a real high-resolution 3D image in front the screen. SeeReal only uses an approx. 30x30 pixel array for each of the 3D scene points - the so-called "sub-hologram" approach.

Overlapping all of these sub-holograms on the data panel allows creating a Full-HD 3D scene while using LCD flat panel displays with resolutions available today, e.g. 30-50µm pixels for a 40-60" holographic HDTV.

The holographic display uses an eye tracker to know where your eyes are located, to send information only to these positions.

Source: http://www.i4u.com/article9159.html

Full Colour Holography

, ,

XYZ Imaging Inc. is the world’s first holographic printing bureau capable of creating production ready multi-resolution, full color, reflective holograms from pure digital media. This technology uses patented holographic technology developed over a 6 year timeframe at a cost of nearly $ 23 Million US dollars.

Combined with a revolutionary emulsion that is more than 300 times finer than ISO 300 film on a super wide format that measures over 1 m wide, allowing for the production of never-before-seen large format holographic prints with a single sheet size of: 1m wide x 1.2m long or longer (based on the length of the film roll).

Source: http://www.xyzimaging.com/

The Dawn of Holographic Media

, , , ...

By the end of this year the first holographic media products will reach the commercial market. Boasting capacities of up to 300 GB, as well as ultra fast access time, these products are poised to revolutionize the IT archive and professional video markets and open the door for future widespread adoption by the consumer market.

InPhase Technologies, a Colorado-based company, spun out of Bell Research Labs, is nearly ready to release its first commercial holographic medium, codenamed HDS5000. This first generation holographic device will support 300 GB and 20 MB/sec transfer rates and use 400-410 nm blue laser.

Source: http://www.tfot.info/content/view/75/59/
December 2009
M T W T F S S
November 2009January 2010
1 2 3 4 5 6
7 8 9 10 11 12 13
14 15 16 17 18 19 20
21 22 23 24 25 26 27
28 29 30 31