Results 11 to 20 of about 3,939 (278)
Use of Computer-Generated Holograms in Security Hologram Applications [PDF]
Latvian Journal of Physics and Technical Sciences, 2016 Abstract The article discusses the use of computer-generated holograms (CGHs) for the application as one of the security features in the relief-phase protective holograms. An improved method of calculating CGHs is presented, based on ray-tracing approach in the case of interference of parallel rays.
Bulanovs, A. +2 more
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Form-birefringent computer-generated holograms [PDF]
Optics Letters, 1996 Polarization-selective computer-generated holograms made with form-birefringent nanostructures were designed, fabricated, and evaluated experimentally at 1.5 microm. The fabricated element showed a large polarization contrast ratio (>250:1) and a high diffraction efficiency (>40% for a binary phase level element).
Xu, Fang +5 more
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Performance Estimation of Intensity Accumulation Display by Computer-Generated Holograms
Applied Sciences, 2021 The image generated by binary computer-generated holograms (CGHs) always suffers from serious speckle noise. Thanks to the fast frame rate of the binary spatial light modulator, the speckle can be significantly suppressed by intensity accumulation, i.e.,
Jung-Ping Liu +3 more
doaj +2 more sources
Computer-Generated Holograms for 3D Imaging
ACM Computing Surveys, 2020 Holography is usually considered as the ultimate way to visually reproduce a three-dimensional scene. Computer-generated holography constitutes an important branch of holography, which enables visualization of artificially generated scenes as well as real three-dimensional scenes recorded under white-light illumination.
Erdem Sahin +3 more
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Optical Encryption Based on Computer Generated Holograms in Photopolymer. [PDF]
Polymers (Basel), 2021 An optical encryption method based on computer generated holograms printing of photopolymer is presented. Fraunhofer diffraction is performed based on the Gerchberg-Saxton algorithm, and a hologram of the Advanced Encryption Standard encrypted Quick ...
Wu T, Ma J, Wang C, Wang H, Cao L, Su P.
europepmc +2 more sources
Light: Science & Applications, 2022 Holographic three-dimensional display is an important display technique because it can provide all depth information of a real or virtual scene without any special eyewear.
Dapu Pi, Juan Liu, Yongtian Wang
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IEEE Photonics Journal, 2023 Fast holographic generation technology depends on the swift creation of computer-generated holograms (CGHs). Currently, the fast generation method of computer-generated holograms based on ray tracing is still based on non-physical ray tracing methods ...
Xindi Chen +5 more
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Fast 3D Analytical Affine Transformation for Polygon-Based Computer-Generated Holograms
Applied Sciences, 2022 We present a fast 3D analytical affine transformation (F3DAAT) method to obtain polygon-based computer-generated holograms (CGHs). CGHs consisting of tens of thousands of triangles from 3D objects are obtained by this method.
Houxin Fan +6 more
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QUALITY ASSESSMENT OF BINARY OBJECT IMAGES RECONSTRUCTED BY COMPUTER-GENERATED HOLOGRAMS [PDF]
Научно-технический вестник информационных технологий, механики и оптики, 2020 Subject of Research.The paper considers the issues of objective quality assessment of computer-generated Fresnel holograms and reconstructed binary object images. Method.The work is performed by the method of projection holographic photolithography based
Sergey N. Koreshev +3 more
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Optics, 2023 Photodissolution is a process that is well known for its ability to cause inclusion of silver into the matrix of a chalcogenide layer, changing its optical properties.
Arjun Karimbana Kandy +6 more
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