Articles tagged with Holography
Researchers at Pohang University of Science & Technology developed a secure hologram platform that stores information using the wavelength of light and spacing between metasurface layers. The technology enables information processing using light alone, without electrical power or electronic chips.
Researchers introduce a novel calculation approach to achieve high-quality holographic imaging in vehicle head-up displays. The 'zoom lens' method reduces computation time by 58% and eliminates zero-padding, enabling seamless virtual and physical reality.
Researchers reviewed recent advances and perspectives of TFLN-based detectors, outlining physical mechanisms for photodetection and implementation schemes. Direct material modification techniques expand the photodetection mechanism and application scope of lithium niobate materials.
Researchers propose IncepHoloRGB, a lightweight unsupervised CGH model generating high-definition RGB holograms through a unified framework. The model combines depth-traced superimposition and Inception sampling block to enhance computing efficiency and visual impression.
A novel metasurface design using vanadium dioxide enables fast, energy-efficient modulation of terahertz waves. This allows for real-time holographic encryption and decoding, with applications in secure communication, medical imaging, and more.
Researchers developed an electrically tunable metasurface for THz holographic devices, leveraging VO2's reversible transition to minimize energy consumption and response time. The microladder design enables real-time operation, fast switching times, and robust performance.
A new imaging approach has simplified retina exams by eliminating the need for mechanical focusing, making fundus cameras more accessible. The system uses a diffuser to capture 3D light information and digitally refocus images after they are taken, producing consistent resolution of about 7-10 line pairs per millimeter.
Researchers develop a generic strategy for vectorial holography using ultrathin metasurfaces, enabling complex images with spatially varying polarization states. The method achieves high efficiency, outperforming previous systems, and has potential applications in optical encryption and anticounterfeiting.
Researchers at Stanford University have developed a novel nanodevice that manipulates light using sound waves, enabling precise control over color and intensity. This breakthrough has significant implications for various fields, including computer displays, virtual reality, and optical communications.
Researchers at Stanford University have made a breakthrough in developing lighter, sleeker mixed reality glasses that use holography technology. The new display achieves large field of view and eyebox, providing a crisp 3D image that fills the user's field of view for an immersive experience.
Researchers measured protein content and growth dynamics of individual biomolecular condensates without disturbing them, gaining insights for future drug development and disease modeling. The study revealed intricate nanoscale organization and complex internal architecture of these microscopic structures.
A research team at POSTECH developed a metasurface technology that can display multiple high-resolution images on a single screen, overcoming conventional holographic limitations. The innovation uses nanostructure pillars to precisely manipulate light, allowing for different images based on wavelength and polarization direction.
Scientists at Linköping University have made a significant breakthrough in creating controllable flat optics using nanostructures on a flat surface. By precisely controlling the distance between antennas, they achieved up to tenfold improvement in performance, opening up new avenues for applications such as video holograms and biomedic...
Researchers at Kobe University have created a single-pixel camera that can record three-dimensional holographic movies, even through tissues. The camera uses a high-speed digital micromirror device to project patterns required for recording the hologram, enabling the capture of moving objects and images outside the visible spectrum.
Engineers at Duke University have demonstrated a method to create stable optical knots using laser beams, which could be used to transmit encoded information or measure turbulence in pockets of air. The team found that by adding more squiggles to the knot's features, they could make it stable for longer and resist degradation.
The Extant Life Volumetric Imaging System (ELVIS) will test a new holographic microscope on the International Space Station to analyze the adaptability and resilience of microorganisms. The system aims to reveal how life might persist on distant moons and planets, significantly enhancing our search for life outside Earth.
A new amplifier developed by Chalmers University of Technology can transmit ten times more data per second than current systems, holding significant potential for various critical laser systems, including medical diagnostics and treatment. The amplifier's large bandwidth enables precise analyses and imaging of tissues and organs.
Researchers have created quantum holograms using metasurfaces and nonlinear crystals, enabling precise control over entangled information. The technology holds promise for practical applications in quantum communication and anti-counterfeiting, with potential to increase information capacity and reduce system size.
A palm-sized digital holographic camera system was developed to capture full-color digital holograms in a single exposure using white LED illumination. The camera achieves video-rate full-color digital holographic motion-picture imaging at 22 fps.
Researchers have developed a holographic method for volumetric additive manufacturing that significantly reduces energy required and boosts resolution. The technique involves projecting three-dimensional holograms onto spinning resin vials, resulting in high-fidelity 3D-printed objects with exceptional accuracy.
A new optical encryption system uses holograms and neural networks to encode information, making it virtually unbreakable. The system achieves an exceptional level of encryption by utilizing a neural network to generate the decryption key.
Researchers propose a new matrix for orthogonal matrix of polarization combinations to enhance polarization multiplexing in holography. The method enables the recording and simultaneous reconstruction of multiple polarized holograms at a single location, with high contrast and robustness.
Researchers at UMass Amherst have developed a new method for aligning 3D semiconductor chips with precision as small as 0.017 nanometers, enabling lower costs and increased access to this technology. The approach uses lasers and holograms to detect misalignments without moving parts.
Researchers introduce a novel computational holography-based method for high-resolution, non-invasive imaging through highly scattering media. The technique drastically reduces measurements required and corrects over 190,000 scattered modes using just 25 holographic frames.
Researchers at KAIST have developed a Janus metasurface capable of controlling asymmetric light transmission, enabling the creation of two independent optical systems with a single device. This technology also enables optical encryption by generating different images depending on the direction and polarization state of incoming light.
Concordia researchers develop a novel method of 3D printing using acoustic holograms, capable of creating complex objects quickly and at once. This technique, called holographic direct sound printing (HDSP), stores information of multiple images in a single hologram, allowing for the creation of multiple objects simultaneously.
A new smartphone-based digital holographic microscope enables precise 3D measurements and has potential applications in medical diagnostics, education, and resource-limited settings. The portable device uses a simple optical system created with a 3D printer and calculates reconstructions based on a smartphone.
The study reveals that parallax significantly impacts the perceived realism and immersion of 3D images viewed through holographic displays. The research team confirmed that 3D images generated by the light field method were preferred over those using the multilayer method.
Researchers have developed a new accuracy verification methodology for ultra-large aperture mirrors using computer-generated hologram (CGH), achieving nanometer-level accuracy. The method uses an equivalent element to test the mirror's surface shape accuracy, overcoming aperture limitations and enabling reliable testing.
A review article discusses optimization algorithms for computer-generated holography (CGH), improving hologram reconstructing accuracy. Non-convex optimization methods are applied to seek optimal solutions, addressing the ill-posed inverse problem in CGH.
The team achieves nanofabrication of nanostructures buried deep inside silicon wafers, enabling sub-wavelength and multi-dimensional control directly inside the material. The breakthrough opens up new possibilities for developing nano-scale systems with unique architectures.
Researchers develop a new photopatterning technique to create dual-mode films with polarization and structural patterns, enabling secure authentication and potential applications in high-level security.
Researchers developed a new type of hologram, 'metahologram', that can project multiple high-fidelity images without crosstalk. This breakthrough enables next-generation technologies like virtual/augmented reality displays, information storage, and image encryption.
Engineers at Stanford University have developed a prototype augmented reality headset that uses holographic imaging to overlay full-color, 3D moving images on the lenses of regular glasses. The new approach delivers a visually satisfying 3D viewing experience in a compact and comfortable form factor suitable for all-day wear.
Researchers at Princeton University have developed a device that improves image quality in holographic displays, enabling a wider field of view and more stable images. The new technology has the potential to transform various industries, from healthcare to home repairs.
The team created ten holograms with varying colors and shapes using an inverse design technique driven by artificial intelligence. They integrated an oblique helicoidal cholesterics-based wavelength modulator to accurately implement the designed holograms, enabling the establishment of an optical security system.
Researchers introduced a novel method for generating computer-generated holograms (CGHs) that significantly reduces computational overhead while maintaining high-quality 3D visualization. The approach leverages a split Lohmann lens-based diffraction model, enabling rapid synthesis of 3D holograms through a single-step backward propagat...
A new approach uses a smartphone screen to create full-color 3D holographic images by leveraging computer-generated holography (CGH) and an optical component called a spatial light modulator. The method has the potential to enhance near-eye displays in virtual reality headsets, creating more realistic and interactive user experiences.
Researchers at TU Wien have demonstrated the possibility of encoding valuable data, such as Bitcoin wallet addresses, in ordinary plastic using 3D printing and terahertz radiation. By adjusting the thickness of the plastic plate to alter the terahertz wave, a holographic image is created that stores the desired code.
A new holographic camera using a liquid lens and end-to-end physical model-driven network can capture high-quality holograms of real 3D scenes in 150 milliseconds. The camera solves two major bottlenecks of existing holographic technology, enabling fast acquisition and improved image quality.
Researchers from Pohang University of Science & Technology developed angle-dependent holograms using metasurface technology, allowing for diverse images based on viewing angles. The holographic display demonstrates an extensive viewing angle of 70 degrees, enabling observers to perceive the three-dimensional image from various directions.
A team of physicists and veterinary scientists at Purdue University has developed a method to detect chemoresistance in cancer patients using biodynamic imaging (BDI). This technique measures the motions inside cancer cells and how they respond to chemotherapy, identifying patients who will not respond to treatment. The study shows pro...
A new technique using optical orbital angular momentum lattice (OAML) multiplexed holography boosts information storage capacity and offers novel approaches for implementing high-capacity holographic systems. The research unlocks supplementary encrypted dimensions, enhancing storage capacity and overcoming limitations of traditional me...
Researchers developed a 360-degree head-up display system that can project holographic representations of road obstacles, improving road safety. The system uses LiDAR data to create accurate and dynamic information about potential hazards.
A new method called TWC-Swin effectively restores holographic images even under low spatial coherence and arbitrary turbulence, surpassing traditional convolutional network-based methods. The study demonstrates strong generalization capabilities, extending its application to unseen scenes.
A team of researchers proposes a novel approach to generate three-dimensional holograms directly from regular 2D color images captured using ordinary cameras. This approach utilizes deep learning to transform the image into data that can be used to display a 3D scene or object as a hologram.
Researchers created a self-supervised AI model called GedankenNet that learns physics laws and thought experiments to reconstruct microscopic images. The model successfully reconstructed human tissue samples and Pap smears from holograms without relying on real-world experiments or data.
A new complex-domain neural network enhances large-scale coherent imaging by exploiting latent coupling information between amplitude and phase components. The technique reduces exposure time and data volume significantly while maintaining high-quality reconstructions.
Researchers have implemented Orbital Angular Momentum (OAM) as an independent information carrier for optical holography, leading to OAM multiplexed holography. The new design approach, MHC-OAM, uses spatial light modulators to achieve multiramp helical conical beams with different parameters serving as information encryption or decryp...
Researchers at the University of Adelaide have created 3D holographic images of embryos to aid in selecting the best quality embryos for IVF, potentially improving success rates. The non-invasive approach uses miniscule amounts of light to provide insights into embryo development.
A new rapid viral plaque detection system enabled by holography and deep learning can help accelerate vaccine and drug development. The system reduces the detection time of traditional viral plaque assays by up to 48 hours, eliminating chemical staining and manual counting.
Researchers at Shinshu University developed high-performance source-shifters using acrylonitrile butadiene styrene (ABS) resin, employing inverse design and topology optimization. The optimized structures can reduce the difference between emitted pressure fields to as low as 0.6%, enabling effective acoustic location camouflaging.
A team of researchers developed an acoustic metasurface-based holography technique that uses a deep learning algorithm to generate and iteratively improve a hologram of the Mona Lisa. The technique successfully reconstructed the painting, with even greater detail in her left eye.
Researchers at the University of Washington have developed a multifunctional interface between photonic integrated circuits and free space, allowing for simultaneous manipulation of multiple light beams. The device operates with high accuracy and reliability, enabling applications in quantum computing, sensing, imaging, energy, and more.
Scientists create a simple approach to fabricating highly precise 3D aperiodic photonic volume elements (APVEs) for various applications. The method uses direct laser writing to arrange voxels of specific refractive indices in glass, enabling the precise control of light flow and achieving record-high diffraction efficiency.
Researchers from USTC developed a new method for ultrahigh-density 3D holographic projection, overcoming key limitations in depth control and crosstalk. The technique uses light scattering to improve depth resolution and reduce crosstalk between planes.
Researchers have developed a new way to create dynamic ultrahigh-density 3D holographic projections, overcoming two long-existing bottlenecks in current digital holographic techniques. The new method enables realistic representations of the world around us for use in virtual reality and other applications.
Researchers have developed a novel autonomous, submersible, 3D holographic microscope and imaging system to study marine particles and plankton in their natural environment. The AUTOHOLO system achieved 90% accuracy in detecting red tide blooms at varying concentrations, enabling near real-time monitoring and tracking of bloom phases.
Researchers develop unique method for applying angular momentum holography for information multiplexing, enabling unprecedented capacity for optical information processing. The new paradigm allows for spatially modulating waveforms and offers additional security locks, revolutionizing existing optical encryption schemes.
Researchers have found that embryos in pregnancies ending in miscarriage take four days longer to develop in the womb than those in live births. This delay is associated with a higher likelihood of miscarriage and may be used to estimate pregnancy outcomes.