Hologram

Diffraction (88)
Electromagnetic radiation (29)
Hologram (134)
Holography (24)
Infrared detector (6)
Light (3352)
Lithography (89)
Spectroscopy (163)
Wavelength (568)

Synopsis: Domenii: Photonics & laser: Photonics & laser colaterale: Hologram:

#Laser light creates hologram the width of a hair Purdue University rightoriginal Studyposted by Emil Venere-Purdue on December 9 2013researchers have created tiny holograms using a etasurfacecapable of the ultra-efficient control of light.

Laser light shines through the nanoantennas creating the hologram 10 microns above the metasurface. f we can shape characters we can shape different types of light beams for sensing

and this is unprecedentedshalaev says. his means you can start to embed it in electronics to marry it with electronics. he layer is about 1/23rd the width of the wavelength of light used to create the holograms.

people could feel holograms of objects that would not otherwise be touchable, such as feeling the differences between materials in a CT SCAN or understanding the shapes of artifacts in a museum.

While#hologram#technology has been improving in recent years along with#3d scanning, its function is mostly to disrupt#3d printing#as a rapid-prototyping system.

At that point, they step into the hologram space, which consists of walls with grids on them that the phone uses to track with technology similar to#Google s Tango.

#Ostendo Technologies chip to bring holograms to smartphones Ostendo chip that can produce a hologram Virtual reality won t require strapping a bulky contraption to your head in the future.

Other companies have shown they can project floating images that appear to be holograms, but many involve large machines employing a system of mirrors to direct light with limited viewing angles.

or tables that can project hologram-like images. So what happens in a world where 3-D

But now, researchers at Stanford university in Palo alto, California, have used another feature of the electron its tendency to bounce probabilistically between different quantum states to create holograms that pack information into subatomic spaces.

But Moon and his colleagues saw a way to go smaller by using a quantum analogy to the conventional hologram.

these electrons interfere with the carbon monoxide molecules to create a quantum hologram. The researchers read the hologram using the microscope to measure the energy state of a single electron wave function.

They showed they could read out an'S'for Stanford with features as small as 0. 3 nanometres.

or pages, of information in this case, an'S'and a'U'within the same hologram.

They teased out the individual pages by scanning the hologram for electrons at different energy levels.

That led study co-author Hari Manoharan to think about using the holograms as stackable quantum circuits

which traverses the hologram more slowly.""To make it practical, one needs to think about the future development of read-out systems,

#'Hologram-lite'idea for 3d phone displays Now physicist David Fattal and his colleagues at Hewlett-packard Laboratories in Palo alto have developed a sort of'hologram-lite'approach.

It's almost like breaking down a hologram into several finite pieces, Fattal says. It involves etching linear grooves#diffraction gratings#onto a thin glass slab (see image below.

Figuring out how to modulate the LCD screen to produce the views is orders of magnitude easier than working out the complicated interference patterns needed to make a moving hologram visible from any direction,

Meta-hologram produces dual images and multiple colors (w/Video) More information: Xiao Ming Goh et al.

#Color hologram uses plasmonic nanoparticles to store large amounts of information In the 4th century, the Romans built a special glass cup,

at the University of Cambridge in the UK, have used surface plasmon resonance as a new way to construct holograms.

Similar to the Lycurgus cup, the new holograms can change colors due to light scattering off silver nanoparticles of specific sizes and shapes.

the new holograms could have applications in 3d displays and information storage devices, among others.""This experiment is inspired by the very unique optical properties shown by the Lycurgus cup,

"Although there are several different ways to construct holograms, almost all traditional holograms are single-color,

and the multicolor holograms that do exist face limitations. For instance, no methodology exists that can produce multicolor holograms from a surface.

Here, the researchers demonstrated that it is possible to construct multicolor holograms from a single plane.

The new holograms consist of precisely engineered silver nanoparticles patterned over a substrate. A key difference in the new holograms is the smaller size of the diffraction fringes,

which control the light wavelength interference. In traditional holograms, these fringes are larger than half the wavelength of light.

In contrast the fringes here are replaced with nanoparticles smaller than half the wavelength of light.

The researchers showed that the narrower band diffraction, which creates the colorful effects, is produced by plasmonic-enhanced optical scattering of the nanostructures.

The subwavelength distance offers certain advantages. For instance, two different types of plasmonic nanoparticles can be multiplexed, or combined but not coupled, at subwavelength distances.

Because of the nature of this phenomenon, it has been possible to demonstrate, for the first time, a hologram that projects color images in 180 degrees.

"These features make the new hologram very attractive for future applications.""Besides the evident application in replacing the typical'rainbow holograms'of credit cards and other security items,

this phenomenon can be used for image projection on spheres, which so far has not been achieved with conventional optics,

"The main goal is the integration of new modulation schemes to produce ultra-thin displays and dynamic holograms

researchers in Britain have developed an acoustic hologram that can hold, move and manipulate objects in mid-air.

Similar freestanding haptic holograms have been developed previously, but without the precision required to hold an object in place

which the authors call an"acoustic hologram, "that can support the bead against the pull of gravity.

As the algorithm tunes the phases, the interference pattern and resulting hologram change, enabling researchers to move the bead around.

The algorithm can fashion acoustic holograms of various spatial configurations, but Drinkwater and his team focused on three:

Researchers have built now a working tractor beam that uses high-amplitude sound waves to generate an acoustic hologram

"Here we individually control dozens of loudspeakers to tell us an optimal solution to generate an acoustic hologram that can manipulate multiple objects in real-time without contact,

And in 2014, researchers at the University of Dundee in Scotland showed that acoustic holograms that act like a tractor beam could theoretically suck in objects."

Low energy electron holography is a technique of using an electron wave to form holograms. Similar to light optical holography

To obtain the high-resolution hologram, an atomically sharp, tungsten tip acts as a source of a divergent beam of highly coherent electrons.

the researchers recorded the sample's high-resolution hologram, a pattern resulting from the interference of the two beams."

holograms and beyond Novel tech that manipulates light has applications beyond holograms, from studying alien worlds to making cellphones more energy efficient In 2010,

and make novel hologram technologies. He created a tool that did much more. The technology is a new way to manipulate light,

which allows us to create nearly perfect geometric phase holograms, "says Escuti, an engineer at North carolina State university."

"To make geometric phase holograms, the DWLS"prints"using an ultraviolet laser on a super-thin film--only about 50 nanometers thick.

One reason the DWLS is unique is that it produces geometric phase holograms that are smoothly varying

and corrupting the signal coming out of the hologram. From the lab to the stars After creating the DWLS,

if we could make holograms with specific characteristics that had previously been technologically impossible. And we could."

his team has provided the astronomers with geometric phase holograms that they have used build advanced coronagraphs--telescopes that can see things close to stars--to study exoplanets beyond our solar system."

Down to earth applications In addition to astronomy, the DWLS has found use in creating geometric phase holograms for use in mobile displays, holographic imaging,

which New Scientist posted on Youtube is more akin to CNN holograms than Twister; there are no flying cows,

and his colleagues uses high-amplitude sound waves to generate an acoustic hologram which can pick up

Here we individually control dozens of loudspeakers to tell us an optimal solution to generate an acoustic hologram that can manipulate multiple objects in real-time without contact,

Researchers have built now a working tractor beam that uses high-amplitude sound waves to generate an acoustic hologram

the researchers describe a smartphone-based device that uses the kind of technology used to make holograms to collect detailed microscopic images for digital analysis of the molecular composition of cells and tissues."

#Laser-printed holograms could enable'smart windows'Making holograms isn't easy-it requires expensive equipment, complex physics and time-consuming recording techniques.

Some progress was made with a recently-developed technique for hologram creation, which splits a laser pulse into two beams to create an interference pattern on a surface.

That method gives the appearance of a hologram quickly and cheaply, but it requires precise alignment of the beams,

Haider Butt and his colleagues overcame those problems using a nanosecond laser than can print ink holograms about a square centimetre in size in just five nanoseconds."

and then recombine them to produce holograms and nanopatterns, "Butt told Phys. org.""Here we use only a single beam,

and this interference pattern is used for writing/printing holograms. The technique requires far fewer optical components,

"It's hoped this new hologram-creation method could be miniaturized into a smartphone, or even used to create 3d artwork and"smart windows".

#Tractor beam lifts and moves small objects Researchers have built a working tractor beam that uses high-amplitude sound waves to generate an acoustic hologram that can pick up

and seemingly defy gravity. ere we individually control dozens of loudspeakers to tell us an optimal solution to generate an acoustic hologram that can manipulate multiple objects in real-time without contact.

#Tractor beam lifts and moves small objects Researchers have built a working tractor beam that uses high-amplitude sound waves to generate an acoustic hologram that can pick up

and seemingly defy gravity. ere we individually control dozens of loudspeakers to tell us an optimal solution to generate an acoustic hologram that can manipulate multiple objects in real-time without contact.

The technology works by using an array of flat speakers to produce acoustic holograms. Just as visual holograms are produced in 3d from interfering light waves,

so acoustic holograms are made by interfering sound waves. When the peaks of two waves meet, they produce a greater amplitude;

when a peak meets a trough they cancel out. Marzo team showed that by carefully adjusting the sound waves,

they could create moving acoustic holograms that worked like 3d cages, tweezers or rotating spirals that could lift,

The sonic tractor beam uses a 3d hologram with the shape of a cage or bottle in

And we can update the hologram in real time to move the cage towards us, and the particle moves with the trap,

turning 2d content into a 3d hologram. It is intended to create a ocial campfirefor the home,

"Our understanding of optics on the macroscale has led to holograms, Google glass and LEDS, just to name a few technologies.

and lenses that could create two-dimensional holograms or focus light at the nanoscale. Surface plasmons are confined to the surface of a metal.

These include tiny structures that are not visible to the naked eye, such as holograms with a tilt effect.

such as the tilt effects of holograms, can also be checked for the first time, says Brockherde. The special architecture of the sensor opens up room for further applications.

#Holograms You Can Actually Touch Are Here It every science-fiction lover dream, holograms tangible enough to touch.

interactive holograms comprised of tiny points of light called voxels. Using femtosecond lasers (a femtosecond is a quadrillionth of a second,

the team can make holograms that are safe to touch, Popular Science reports. The images are three-dimensional, with resolutions up to 200

when touched the hologram texture feels like sandpaper. Although previous studies have used nanosecond and femtosecond lasers to create images,

and hearts that break when touched. hologram To create their hologram, researchers fired their femtosecond laser through a spatial light modulator,

A camera underneath the hologram captures user interaction, allowing the dots to respond to being ouched.

making the hologram exponentially safer than previously thought. Ochiai says this is machine is just a proof of concept,

and now his team will work to make the holograms larger. Theye limited by the size of the spatial light modulator

A tabletop device called the Holus converts any digital content into 3d holograms, which feature in the sci-fi film series in the form of chess sets, maps and warning messages.

so developers can convert digital content into holograms.''Four distinct are stitched together by algorithms provided in our applications and software development kit (SDK),

while Leap Motion controllers can also be used to manipulate holograms. Vincent Yang, CEO, explained: ur vision with Holus was to create an open platform that was accessible to absolutely everybody. olus has unlimited potential that allows people to tailor everything to their personal needs.

23:40 GMT, 29 june 2015 From Princess Leia in Star wars to a holographic Tupac at the 2013 Coachella festival, holograms have fascinated scientists for decades.

But because they use lasers to project the hologram, it makes interacting with the images potentially dangerous-until now.

Researchers have created 3d holograms using lasers that fire at a quadrillionth a second, and they respond to touch without burning the user's skin.

Scroll down for video Researchers from the University of Tokyo used femtosecond lasers to create 3d holograms that are safe to touch

A camera under the hologram is then able to capture and record a user's interactions,

'The holograms and workspace of the system are up to 1cm3 in volume but the researchers said they could be scaled up depending on

#Hologram, to which can touched Holograms are becoming more and more commonplace phenomenon, finding use in various industries.

A idea of`interaction with the hologram is not subject to only to science fiction stories. The Japanese presented the world another sensation.

Scientists have formed a hologram in the form of hearts, stars and little fairies. The visible image is a three-dimensional representation of two-dimensional data.

But tangible hologram can be used in the holographic interfaces. e

#Over 100 banks hit by sophisticated cyberattack: report The Japan Times WASHINGTON A sophisticated global cyberattack struck more than 100 banks in 30 countries stealing hundreds of millions of dollars The New york times reported Saturday.

"Our understanding of optics on the macroscale has led to holograms, Google glass and LEDS, just to name a few technologies.

and lenses that could create two-dimensional holograms or focus light at the nanoscale. Surface plasmons are confined to the surface of a metal.

or through the image) an effect impossible for a hologram to achieve. An example of Pearl can be viewed at:

#Superfast Lasers Create A Hologram You Can Touch The halls of science fiction are decorated well with dreams of hologramsules Verne introduced holography to literature in 1893 with The Castle of the Carpathians,

interactive holograms comprised of tiny points of light called voxels. Using femtosecond lasers (a femtosecond is a quadrillionth of a second,

the team can make holograms that are safe to touch. The images are three-dimensional, with resolutions up to 200,000 dots per second.

To create their hologram, researchers fired their femtosecond laser through a spatial light modulator, which continues the beam through a series of lenses, a mirror and a Galvano scanner,

A camera underneath the hologram captures user interaction, allowing the dots to respond to being ouched.

making the hologram exponentially safer than previously thought. The key to making these holograms safe is the shorter duration of the laser bursts.

In tests, if the lasers fired in more than two second bursts, they burnt the leather researchers used to simulate skin.

and now his team will work to make the holograms larger. Theye limited by the size of the spatial light modulator,

#Researchers create holograms you can touch using high-powered lasers Three-dimensional, interactive holograms are now a reality,

thanks to researchers in Japan who have used powerful, ultra-quick lasers to produce holograms that can be physically felt

and respond to human touch. According to volunteers who have tested these interactive holograms, the mid-air mirages feel somewhere between sandpaper and a static shock.

They're made using tiny points of plasma light called voxels, that are created when the focused energy of a laser ionises the surrounding air.

That high speed means the holograms can respond in real-time to touches and add a level of interactivity with the help of a camera underneath,

Team leader Yoichi Ochiai says the hologram size is limited by the size of the spatial light modulator included in the setup,

but the potential is there once scientists work out how to make these holograms larger and more varied."

"What we have shown can be thought of as a form of optical holography where the hologram can be made in real time using sound.

said Capasso. ur understanding of optics on the macroscale has led to holograms, Google glass and LEDS,

and lenses that could create two-dimensional holograms or focus light at the nanoscale. Surface plasmons are confined to the surface of a metal.

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