Holograms that offer a three-dimensional (3D) view of objects provide a level of detail that is unattainable by regular two-dimensional (2D) images. Due to their ability to offer a realistic and immersive experience of 3D ...
Optics & Photonics
Oct 18, 2023
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The term meta means a concept of transcendence or surpassing, and when applied to materials, metamaterials encompass artificially engineered substances that exhibit properties not naturally found in the environment. Metasurfaces, ...
Nanophysics
Jun 14, 2023
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84
Holograms are often displayed in science fiction as colorful, life-sized projections. But what seems like the technology of the future is actually the technology of the present, and now it has been used to recreate the Mona ...
Optics & Photonics
May 30, 2023
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96
Researchers have developed a new way to create dynamic ultrahigh-density 3D holographic projections. By packing more details into a 3D image, this type of hologram could enable realistic representations of the world around ...
Optics & Photonics
Apr 6, 2023
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90
3D holograms from your phone, television, or favorite droid have been promised for decades but, despite being of great interest, have yet to materialize. The applications for them are far-reaching, particularly in the medtech ...
Optics & Photonics
Dec 19, 2022
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In a scene from "Star Wars: Episode IV—A New Hope," R2D2 projects a three-dimensional hologram of Princess Leia making a desperate plea for help. That scene, filmed more than 45 years ago, involved a bit of movie magic—even ...
Optics & Photonics
Nov 28, 2022
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243
Holographic devices are used for security enhancement, entertainment, 3D display technologies and augmented reality and more. Due to their high information capacity, the ability to track ongoing external processes by assessing ...
Biochemistry
May 20, 2022
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Star Wars turned into real life? A NASA doctor appeared as a hologram at the International Space Station for a telemedicine visit with an astronaut in Oct. 8, 2021, according to a recent release from NASA.
Space Exploration
Apr 20, 2022
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3D holograms, previously seen only in science fiction movies, may soon make their way to consumer technology. Until now, 3D holograms based on phase shifting holography method could be captured using a large, specialized ...
Nanophysics
Jan 5, 2022
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216
Since its invention by Nobel Laureate Dennis Gabor in the late 1940s, holography has found widespread use in science and engineering applications such as computational imaging, microscopy, sensors, displays and interferometry. ...
Optics & Photonics
Nov 2, 2021
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Holography (from the Greek ὅλος hólos, "whole" + γραφή grafē, "writing, drawing") is a technique that allows the light scattered from an object to be recorded and later reconstructed so that when an imaging system (a camera or an eye) is placed in the reconstructed beam, an image of the object will be seen even when the object is no longer present. The image changes as the position and orientation of the viewing system changes in exactly the same way as if the object were still present, thus making the image appear three-dimensional. This effect can be seen in the figure on the right where the orientation of the mouse is significantly different in the two images and its position relative to other parts of the scene has changed. The holographic recording itself is not an image – it consists of an apparently random structure of either varying intensity, density or profile – an example can be seen in Figure 4 below.
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