Articles tagged with Holography
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Researchers have demonstrated an easy method to alter VCSELs to reduce speckles, improving their suitability for applications like lighting and holography. By changing the device shape, they introduced chaotic behavior, allowing more modes to be emitted and reducing speckle density.
Researchers developed temporal compressive super-resolution microscopy (TCSRM) to overcome optical diffraction's spatial resolution restriction. TCSRM achieves high-speed imaging at 1200 frames per second with a spatial resolution of 100 nanometers, enabling observation of fast dynamics in fine structures.
A new study reveals that holographic haptic displays create diffuse and faint tactile sensations due to widespread vibration patterns in the skin. The researchers discovered a phenomenon known as constructive interference that amplifies shock waves, leading to reduced spatial precision and clarity.
Direct incorporation of a metasurface in a laser cavity enables spatiotemporally modulated laser pulses. Giant nonlinear saturable absorption allows pulsed laser generation via Q-switching process.
Researchers at Max Planck Institute and Heidelberg University have developed a technology to assemble matter in 3D using sound waves. They successfully printed microparticles, gel beads, and biological cells into three-dimensional shapes, paving the way for novel 3D cell culture techniques.
Researchers use coherent correlation imaging to image the evolution of magnetic domains in time and space without prior knowledge. The study reveals thermal motion and pinning effects on domain boundaries, unlocking new insights into magnetism's microcosm.
Researchers at POSTECH have created a humidity-responsive display that changes brightness and color depending on humidity levels, allowing for infinite imaging capabilities. The technology uses polyvinyl alcohol (PVA) and single-step nanoimprinting to achieve high-tunability of holographic images.
Researchers at ARC Centre of Excellence for Transformative Meta-Optical Systems have developed a miniaturized optical system that can be integrated on a chip, allowing for the creation of 3D holograms. This technology has the potential to replace current 2D imaging, enabling less invasive surgeries and better surgical outcomes.
Scientists have successfully filmed the impulsive response of bound electrons to intense XUV pulses using a new photoelectron spectroscopy. The technique provides a novel method for time-resolved imaging of ultrafast bound-state electron processes in intense laser fields.
Researchers develop new method to evaluate telescope performance before installation, enabling better optimization and reduced scattering. This approach uses near-field radio holography to map the optics at cryogenic temperatures, improving signal-to-noise ratio and ensuring accurate space observations.
The gauge/gravity duality states that gravity emerges from a quantum gauge theory, linking the fundamental nature of spacetime and matter. Recent advances in this duality have led to breakthroughs in resolving information paradoxes of black holes and modeling neutron star behavior.
Researchers can now study microplankton at an individual level using holographic microscopy and AI, gaining a deeper understanding of their movement, growth, reproduction, and interactions. This breakthrough provides new insights into the ocean's oxygen production and carbon cycle.
Researchers at Kyushu University counted electric charges in individual platinum nanoparticles down to the electron level, revealing net charge with high precision. This breakthrough enables better understanding and development of catalysts for breaking down pollutants.
Researchers developed a metasurface device with three working modes, exploiting nanostructures to manipulate light and create holographic or structural-color nanoprinting images. The device offers two layers of security for anticounterfeiting measures, providing a simple yet effective approach to fight against counterfeiting.
A team of researchers led by Prof. Shinya Hosokawa analyzed the atomic configurations of Pd42.5Ni7.5Cu30P20, a champion bulk metallic glass, and found its characteristic configurations that lead to its excellent glass-forming ability.
Researchers have developed a new end-to-end neural network called Fourier Imager Network (FIN) that can speed up the reconstruction of holographic images. FIN works well on new types of samples not seen by the network during training, delivering high-quality images and improved computational speed.
Researchers developed a new holographic microscope that can see through the intact skull and image the neural network of a living mouse brain with high resolution. The technology uses a wave correction algorithm to filter out multiple scattered light waves, allowing for sharper images.
Researchers developed a high-resolution holographic endoscope system that can reconstruct microscopic images without attaching equipment to the fiber bundle. The new endoscope has a diameter of 350 μm and achieves spatial resolution of 850 nm, far smaller than the core size of optical fibers.
Researchers have developed a novel neural network architecture that achieves unprecedented generalization to unseen sample types, outperforming classical algorithms and state-of-the-art models. The Fourier Imager Network (FIN) demonstrates superior computational speed in phase retrieval and holographic image reconstruction tasks.
A novel metaholographic platform has been developed to detect light exposure, addressing concerns about light damage to vaccines and other biomedical substances. The technology can be used in intelligent packaging and labeling to prevent counterfeits and verify authenticity of products.
A new AI-rendering system leverages layered depth image representation to create high-quality phase-only 3D holograms in real-time on consumer desktops and cellphones. The system corrects vision aberrations and produces realistic depth boundaries, making holographic displays more accessible.
Researchers have developed a new chip-based beam steering device that eliminates aliasing errors, enabling high-quality beam steering over large fields of view. The device, published in Optica, has the potential to revolutionize lidar applications in autonomous driving, virtual reality, and biomedical sensing.
Researchers developed a new printing technique that applies a 19th-century color photography method to modern holographic materials, producing large-scale images on elastic materials with structural color. The team's results enable the creation of pressure-monitoring bandages, shade-shifting fabrics, or touch-sensing robots.
Scientists at Kyoto University propose a novel approach using holograms to approximate the universe's expansion in de Sitter space. The model uses conformal field theory and a positive integer for the cosmological constant, enabling the identification of the first example of two-dimensional CFT.
Researchers have created a tunable liquid crystal grating based holographic 3D display system that achieves a wide viewing angle of 57.4°, seven times greater than conventional systems. The system can also enlarge the size of holographic images by up to 4.2 times and is simple to operate.
Researchers present a broad overview of modern computer-generated holography (CGH) algorithms, acceleration techniques, and dedicated hardware solutions. They classify CGH algorithms based on discretization methods and discuss visual quality assessment to optimize perceptual quality.
The Holography and Metamaterials Lab uses a Mach-Zehnder interferometer to record holograms containing intensity and phase information. These are reconstructed and combined to create true 3D virtual reality and high-resolution topograms of fingerprints, revealing level-3 details.
Researchers at NJIT are developing a mixed-reality system that can provide coaches with real-time statistics, facial interpretation data, and remote access to trainers. The system aims to enhance training and decision-making in team sports.
A team of scientists has created a new manufacturing routine and application of binary amplitude-only holograms for direct drug printing. The diffraction pattern reflects the amount of cargo remaining in the hologram, enabling tracking of substance release over time.
Researchers developed a metasurface-based device that produces multiple distinct holographic images depending on the surrounding medium and wavelength of light used. The device can be used for encryption, humidity sensing, or biomedical applications.
Researchers at Universitat Politècnica de València have developed 3D-printed acoustic holograms that can open the blood-brain barrier, allowing for precise administration of therapeutic drugs to treat Alzheimer's and Parkinson's diseases. The technology enables controlled focusing of ultrasonic beams on specific brain structures.
A research team at Pohang University of Science & Technology developed an optical encryption platform that works in both the visible and ultraviolet regimes. The platform uses metasurface technology to display unique product numbers and improve encryption security.
Researchers from the University of Cambridge and Disney Research developed a new method to display highly realistic holographic images using holobricks that can be stacked together. This technology has the potential to support large-scale holographic 3D displays with high-quality visual experiences.
Researchers developed a two-wavelength holographic system to measure the topography of metal melt pools during laser beam melting. The system successfully captured 3D shape dynamics, including key-hole regime instabilities and oscillations between modes.
A review of digital holography (DH) for measuring and characterizing soft matter structures reveals its strong ability to characterize films and dynamic processes. DH enables accurate and high-precision measurements in various applications, including inkjet printing, additive manufacturing, and advanced fabrication techniques.
Recent advancements in machine learning and neural networks enable real-time computer-generated holograms, overcoming data transmission challenges. Larger spatial light modulators and improved rendering hardware are also bringing holographic projection systems closer to consumer market.
The article examines the inconsistencies in holography's language and its evolution across diverse communities. The pioneers created a useful and accurate language, but much of it has been lost over time. A layman can describe a hologram as a window that transforms light into a different wave, enabling viewing of a 3D image.
Researchers at Duke University developed a holographic system that can image and analyze tens of thousands of cells per minute to spot signs of disease. The technique distinguished between healthy samples and cancerous or pre-cancerous cells with nearly 100% accuracy, using just four basic cellular physical parameters.
Shima Shahab, a Virginia Tech assistant professor, is studying acoustic holograms to manipulate sound waves and their effects on physical surfaces. Her research aims to improve non-invasive treatment of neurological disorders using this technology.
Researchers at Northwestern University developed a new high-resolution camera that can see hidden objects by indirectly scattering coherent light. The device overcomes limitations of existing NLoS imaging technologies with high spatial and temporal resolution, small probing area, and large angular field of view.
The Stanford Computational Imaging Lab has developed a technique to reduce speckling distortion in holographic displays, while another paper proposes a method to realistically represent the physics of 3D scenes. The new system uses neural networks and camera-in-the-loop calibration for real-time adjustments.
Digital holography enhances non-contact, precise, and dynamic measurements for complex amplitude analysis. Common-path configurations share paths between object and reference beams, improving temporal stability.
Researchers at Harvard SEAS have demonstrated a new way to control polarized light using metasurfaces, enabling holographic images with an unlimited number of polarization states and manipulation in virtually infinite directions. This advancement could lead to applications in imaging, microscopes, displays, and astronomy.
A POSTECH research team has developed an encrypted hologram printing platform that works in both natural light and laser light using the metasurface technology. The device can produce a holographic color image retaining specific polarization, setting it apart from previously reported holograms.
A research team led by the University of Göttingen has created tiny gas bubbles with a radius of a few thousandths of a millimeter using laser pulses, observing their expansion and shockwaves. The team used holographic flash imaging and X-ray laser pulses to capture data and images, providing insights into cavitation processes.
A team of scientists has developed an efficient method to suppress meta-holographic artifacts while maintaining image quality. By fine-tuning the coherence of illumination using a degenerate cavity laser, they can reduce coherent artifacts and improve the spatial resolution of holographic images.
Researchers at Brigham Young University have developed technology to create holographic-like virtual objects that co-exist in physical space. They can interact with humans and are projected onto everyday objects, enabling immersive experiences.
Researchers have discovered a precise way to control individual ions using holographic optical engineering technology. The new technology promises to aid the development of quantum industry-specific hardware and potentially quantum error correction processes.
Researchers at POSTECH developed an ultra-compact wearable gas sensor that detects toxic gases and displays a holographic alarm. The sensor uses metasurface technology to provide immediate visual notification without relying on external mechanical or electronic devices.
A team of researchers from EPFL's Audiovisual Communications Laboratory used historic photographic plates to study the original light and colors of century-old scenes. They found that Lippmann's method captured 26-64 spectral samples, far more than modern techniques, and were able to recreate the original light using an algorithm.
Researchers developed a holographic endoscope made of single-hair thin optical fibers to reconstruct images of macroscopic objects at larger imaging distances. The tool sheds light on biological processes occurring at the macromolecular and subcellular levels, allowing for better treatment of severe brain diseases like Alzheimer's.
Researchers from Tokyo Metropolitan University have developed a simplified algorithm to convert freely drawn lines into holograms on standard desktop CPUs. The new method reduces computational cost and power consumption, allowing for real-time conversion of writing into holographic images.
UNIST students won multiple awards at the 2021 Samsung Humantech Paper Award, including the grand prize for Jong Won Oh's work on multimodal holograms. The institute has a strong track record of producing excellent research, with 2 Silver and 5 Bronze awards also given to students.
A team of MIT researchers has developed a new way to produce holograms almost instantly using deep learning, allowing for real-time hologram generation. The 'tensor holography' method can run on a smartphone and is more efficient than traditional physics-based simulations.
Researchers have developed a laser-based method to print nanostructured holograms on dried corn syrup films, enabling edible hologram decoration for foods. The holograms can also indicate sugar content or ensure food safety, making them a promising innovation in the food industry.
A new scanless high-speed holographic fluorescence microscopy system has been developed with submicron resolution, enabling 3D sensing of nanoparticles and color-multiplexed holographic fluorescence imaging. The system achieves measurements in less than 1 millisecond using digital holography and a phase modulator.
Researchers developed a new approach to improve holographic display technology, combining software and hardware advancements. Michelson holography uses two phase-only SLMs to create higher-quality images, overcoming limitations of existing technologies and enabling compact devices for virtual and augmented reality applications.
Researchers have developed a new method called Raman holography, which uses surface-enhanced Raman scattering to image and analyze single particles in three dimensions. This technology has the potential to revolutionize fields such as live cell imaging and anti-counterfeiting.
Holographic fluorescence imaging combines sensitivity, resolution, and specificity to track individual particles in 3D. The technique uses lateral shearing-interferometry to access phase information of each photon, enabling single-molecule sensitivity.
ETRI's 1μm pixel pitch panel and 360° tabletop hologram system has won the I-zone Best Prototype Award at Display Week 2020, showcasing a significant advancement in display technology. The system allows for large viewing angles and is the first to receive this award from a South Korean developer.