Moisture Sensitive Holograms

16 02 2008

Researchers in Ireland have developed a unique solution to determine the air’s moisture content quickly and accurately through innovative use of holographic technology.

These researchers at the Dublin Institute of Technology have successfully fabricated a hologram that quickly changes its color in response to even slight fluctuations in humidity and is able to return to its original color once the moisture in the atmosphere dissipates!

The material used to create this innovative hologram is a self-processing acrylamide-based photopolymer on a glass substrate.

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1TB Holographic Storage Disk is Coming!

26 07 2007

Yes, you read that right!

1TB or One Tera Byte or 1000GB or One Thousand Giga Byte or unbelievble storage capacity on a Blu-Ray Disk!

It is possible according to the latest research as per this article.

A group of scientists working together with the Institute of Optics and Optical Technologies at the Technical University of Berlin claim to have discovered a way to store 500GB worth of data on DVD-sized discs.

And the discs may be available sooner than one imagines it can be possible. Thanks to the holographic techniques, namely – Microholography, being used to develop this beauty with monsterous capacity for data storage.

Wow… wow… wow and WOW! Can’t wait to store all of my hard disk and more on a disk that can be carried around! What about you, guys? 🙂





Holograms helps people with Astigmatism

11 07 2007

A new research in Australia suggests that people with astigmatism may soon look at holograms to diagnose their eye condition.

It is being hoped that 3D images will be easier for patients to use than current methods and allow optometrists to more quickly diagnose this common eye focusing problem.

In the most common form of the condition, the vertical and horizontal lines of a cross are in focus at two different distances, says Dr Avudainayagam. About 10% of the population have a degree of astigmatism that requires correction, he says, adding it can be very hard to correct if not caught at an early age. He says the current gold standard of diagnosing it involves patients trialling different lenses until they can see a test image 6 metres away completely clearly. This can be slow and cumbersome, and people have to remember how things look with each lens as they compare them. Dr Avudainayagam says the hologram method has already been tested on real eyes in another experiment involving a different focusing problem. – abc.net.au

Source: http://abc.net.au/news/stories/2007/07/10/1974208.htm





Holograms For Better Vision Tests

7 07 2007

Yet another innovation using a hologram.

Researchers in Australia have created a new one-step test that uses holograms to diagnose the astigmatic error of the human eye, a key measurement in determining the appropriate prescriptions for eye glasses in patients. This new technique adds to an earlier one, developed by the same researchers, for using a single hologram to measure another important property, the spherical refractive error of the eye.

In subjective refraction the spherical and cylindrical errors of the human eye are measured. Recently, we reported a technique by which the spherical error can be measured in one step using a hologram. We have now developed a holographic target consisting of sunburst patterns to measure the astigmatic error of the human eye as well. Apart from being simple, quick, and low cost, holography offers the advantage of being an open field refraction system that is devoid of the problem of proximal accommodation. We describe the holographic target, its working principles, the measurement procedure, and the initial results obtained. – ScienceDaily

Hologram Manufacturers, take a bow!

Source: http://www.sciencedaily.com/releases/2007/07/070705120743.htm 





Leonardo Da Vinci’s Holograms!

6 07 2007

Countless visual images discovered within Leonardo da Vinci’s paintings and drawings. Optical illusions and what is believed to be a “Hologram Effect” created by artist/inventor Leonardo da Vinci, revealing gorillas and snakes on The Mona Lisa. A masked/scary face hidden within Virgin of the Rocks. Reptiles all over The Virgin and St. Anne… and much, much more. Just about every single work of art by this ingenious artist holds layer, upon layer of hidden images.

Discovered by L. A. Jansann, an artist obsessed with the belief that the unexplainable mystique of Mona Lisa and her alluring smile held far more secrets than first meets the eye. Which lead to an exhaustive examination of painting after painting, drawing after drawing, revealing a seemingly endless array of incredibly amazing hidden images.

N2daVinciandBeyond.com is a personal blog created in an effort to share the discovery of countless hidden images discovered within Leonardo da Vinci’s works of art. Optical illusions and what is believed to be a “Hologram Effect” created by the ingenious artist/inventor has revealed images of gorillas and snakes on The Mona Lisa. A masked face hidden within Virgin of the Rocks and much, much more. Just about every single work of art by Leonardo da Vinci holds an array of hidden images.

Source: http://www.pr.com/press-release/41643





X-Ray Holograms Expose Secret Magnetism

18 05 2007

Collaborative research between scientists in the UK and USA has led to a major breakthrough in the understanding of antiferromagnets, published recently in Nature. Scientists at the London Centre for Nanotechnology, the University of Chicago and the Center for Nanoscale Materials at Argonne National Laboratory have used x-rays to see the internal workings of antiferromagnets for the very first time.

Unlike conventional magnets, antiferromagnets (such as the metal chromium) are materials which exhibit ‘secret’ magnetism, undetectable at a macroscopic level. Instead, their magnetism is confined to very small regions where atoms behave as tiny magnets. They spontaneously align themselves opposite to adjacent atoms, leaving the material magnetically neutral overall.

Professor Gabriel Aeppli, Director of the London Centre for Nanotechnology, said: “People have been familiar with ferromagnets for hundreds of years and they have countless everyday uses; everything from driving electrical motors to storing information on hard disk drives. We haven’t been able to make the same strides with antiferromagnets because we weren’t able to look inside them and see how they were ordered.

“This breakthrough takes our understanding of the internal dynamics of antiferromagnets to where we were ninety years ago with ferromagnets. Once you can see something, it makes it that much easier to start engineering it.”

The magnetic characteristics of ferromagnets have been studied by scientists since Greek antiquity, enabling them to build up a detailed picture of the regions — or “magnetic domains” — into which they are divided. However, antiferromagnets remained a mystery because their internal structure was too fine to be measured.

The internal order of antiferromagnets is on the same scale as the wavelength of x-rays (below 10 nanometers). The latest research used x-ray photon correlation spectroscopy to produce ‘speckle’ patterns; holograms which provide a unique ‘fingerprint’ of a particular magnetic domain configuration.

Dr. Eric D. Isaacs, Director of the Center for Nanoscale Materials, said: “Since the discovery of x-rays over 100 years ago, it has been the dream of scientists and engineers to use them to make holographic images of moving objects, such as magnetic domains, at the nanoscale.

“This has only become possible in the last few years with the availability of sources of coherent x-rays, such as the Advanced Photon Source, and the future looks even brighter with the development of fully coherent x-ray sources called Free Electron Lasers over the next few years.”

In addition to producing the first antiferromagnet holograms, the research also showed that their magnetic domains shift over time, even at the lowest of temperatures. The most likely explanation for this can be found in quantum mechanics and the experiments open the door to the future exploitation of antiferromagnets in emerging technologies such as quantum computing.

“The key finding of our research provides information on the stability of domain walls in antiferromagnets,” said Oleg Shpyrko, lead author on the publication and researcher at the Center for Nanoscale Materials. “Understanding this is the first step towards engineering antiferromagnets into useful nanoscale devices that exploit it.”

Source: http://www.photonicsonline.com/content/news/article.asp?DocID=%7BDAE024CB-91F8-4167-B05A-02E56A129513%7D&Bucket=Current+Headlines&VNETCOOKIE=NO