Optimized random phase only holograms

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August undefined, 2024

WebThe resulting Optimized Fresnel RAndom Phase (OFRAP) is then multiplied with the desired intensity target, and after performing a Fresnel transform and a phase extraction we obtain the corresponding phase only hologram. WebSep 7, 2024 · We present a fast and simple technique to generate phase only Fresnel holograms of 2D intensity objects. This technique uses a modified Gerchberg-Saxton (G-S) algorithm to optimize a random phase. This optimization takes into account the resolution, pixel size, reconstruction plane, and optical characteristics of the system that will …

Frontiers Deep-Learning Computational Holography: A …

WebThis produces an optimized random phase (ORAP), which is used for fast generation of phase only holograms of arbitrary amplitude targets. This ORAP needs to be generated … WebWe propose for the first time, to the best of our knowledge, the use of optimized random phases (ORAPs) in a double random phase encryption scheme (DRPE). In DRPE schemes the convolution between two random phase functions encrypts the … bulbapedia ash\u0027s incineroar

Review of computer-generated hologram algorithms for color

WebSep 7, 2024 · We present a fast and simple technique to generate phase only Fresnel holograms of 2D intensity objects. This technique uses a modified Gerchberg-Saxton (G … WebFeb 7, 2024 · The Gerchberg–Saxton (GS) algorithm is a widely employed algorithm for the calculation of a phase-only hologram (POH). However, the POH that can strictly satisfy the amplitude constraints on the object and the holographic plane may not exist or be obtained, resulting in speckle noise and reduction of the reconstruction quality. WebNov 10, 2024 · The optimized random phase tiles can be generated for any distance between the hologram plane and the object using an iterative Fresnel algorithm. … crush niere icd 10

Improvement of the image quality of random phase-free …

Optimized random phase only holograms in the Fresnel domain

WebJul 26, 2024 · In 1966, Lohmann and Brown devised detour phase method to encode the optical wavefronts into holograms by computer 19. In 1967, Lohmann and Paris applied the fast Fourier transform (FFT)... WebFeb 15, 2024 · This produces an optimized random phase (ORAP), which is used for fast generation of phase only holograms of arbitrary amplitude targets. This ORAP needs to be … bulban road werribeeWebMay 1, 2024 · For the CGH optimized algorithm, an usual solution for generating holograms is the integral diffraction calculation of the target intensity and the random phase mask [8], [9], [10], [11], which is defined as the conventional method in this paper. crush new york

"WebApr 20, 2024 · The enhanced-NA Fresnel hologram reconstructs a holographic image at a viewing angle larger than the diffraction angle of a hologram pixel. The image space is limited by the bandwidth of a digital hologram. In this study, we investigate the property of image formation in the extended image space beyond a diffraction zone. A numerical … " - Optimized random phase only holograms

Optimized random phase only holograms

Optimized random phase tiles for non-iterative hologram generation

WebNov 10, 2024 · The optimized random phase tiles can be generated for any distance between the hologram plane and the object using an iterative Fresnel algorithm. Afterwards, this tile can be used to generate holograms from any number of objects without the need for further iterative algorithms. WebFeb 15, 2024 · The random phase method and quadratic phase method are most widely used in the generation of non-iterative phase holograms. However, the former leads to the reconstruction being severely disturbed by speckle noise, with serious loss of detailed information, and the latter leads to the reconstruction being contaminated with ringing …

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WebFeb 1, 2024 · This website requires cookies, and the limited processing of your personal data in order to function. By using the site you are agreeing to this as outlined in our privacy … WebJun 10, 2024 · Ishii, Y. et al. Optimization of phase-only holograms calculated with scaled diffraction calculation through deep neural networks. Applied Physics B 128, 1-11 (2024). ... In this method, a small phase mask with random phase is first optimized by iterative optimization. Then, the optimized small mask is tiled to the same size as the original ...

WebFeb 15, 2024 · This produces an optimized random phase (ORAP), which is used for fast generation of phase only holograms of arbitrary amplitude targets. This ORAP needs to … WebThe resulting Optimized Fresnel RAndom Phase (OFRAP) is then multiplied with the desired intensity target, and after performing a Fresnel transform and a phase extraction we …

WebDec 1, 2024 · The hologram resolution is 1024 × 1024 pixels, while the signal area had a resolution of 800 × 800 pixels, and 12 μ m pixel size. According to Eq. (10), the … WebApr 7, 2024 · Generation and experimental reconstruction of optimized Fresnel random phase-only holograms 1. Introduction Controlling the degrees of freedom of a light field, …

WebIn this work, we introduce a technique for fast, high-quality, non-iterative generation of phase-only holograms from both 2D and 3D scenes. In this technique, we generate an optimized random phase tile which behaves like a small diffuser, spreading the amplitude of a section of the scene throughout the hologram plane. Each section of the scene is …

WebNov 15, 2015 · There are well-known methods for improving the random phase applied-holograms: the Gerchberg–Saxton (GS) algorithm [10], [11], the multi-random phase method [12], the one-step-phase-retrieval method (OSPR) … crush n grind carolina beachWebFeb 13, 2024 · The phases of the wavefront recorded at different times are calculated, only one image hologram is needed for the phase to be determined at a given time instant . Matoba et al. propose an optical voice recorder based on digital holography for recording and reproducing propagating sound waves in air [ 20 ]. crush n gusher disneyWebNov 10, 2024 · The optimized maximal value of the random phases is analyzed. Utilizing the evaluation results, we propose a frequency-based optimized random phase that reduces the unfavorable effect of the insufficient dynamic range of computer-generated holograms and prevents excessive diffusions by traditional random phases. crush night clubWebJan 15, 2024 · In phase-only holograms, only the object light is reconstructed, but in principle, a bleached-phase hologram generates conjugate light and direct light in addition … bulban rd werribeeWebSep 7, 2024 · The ORAP method can also be adapted to the generation of phase-only Fresnel holograms; in this case, it is known as the optimized Fresnel random phase (OFRAP) … crushnightgal10.meWebAug 9, 2024 · The ORAP technique uses a pre-generated random phase to obtain large amounts of holograms without need for iterative algo- rithms. As we will show, this method has the advantage of introducing an interframe correlation when generating a … crush nighty on meeshoWebAug 9, 2024 · generate phase only holograms corresponding to a color scene using a technique known as optimized random phase (ORAP) [36] under a space division … crush nicknames girl