Optimized random phase only holograms

Author: cwgw

August undefined, 2024

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 … 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 in the Fresnel domain

Web1. Introduction. The computer-generated hologram (CGH), as a promising technology for three-dimensional display, has attracted broad attention in the past two decades [1 – 4].Since no display device can modulate the amplitude and phase of the incident light field simultaneously, the complex amplitude hologram (CAH) needs to be converted to an … WebMar 17, 2024 · The Gerchberg–Saxton (GS) iteration algorithm is widely used for phase-only computer-generated holograms. However, as the GS algorithm was originally developed for single-plane holographic reconstruction, its reconstruction capability for multiple planes is limited. The additive cross-talk between different image planes results in image-quality … how big is an average inground pool

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WebFeb 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 ]. WebAn iterative method with bandwidth constraint strategy is proposed to design phase holograms for high-quality speckle-free optical reconstruction. The bandwidth properties of the reconstructed field are analyzed theoretically based on the sampling theory, which helps in properly allocating the sampling resources for efficiently describing the speckles and … 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 … how many nukes has nato got

Optimized iterative method for generating phase-only Fourier …

Optimized random phase only holograms in the Fresnel domain

WebPhase-Only Holograms. Obtaining a desired wavefront in the focal plane requires introducing the appropriate wavefront in the input plane. Most lasers, however, provide … 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, … how big is an average sharkWebNov 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. how big is an average chicken

"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. " - Optimized random phase only holograms

Optimized random phase only holograms

Applied Sciences Free Full-Text Expansion of Image Space in ...

WebFeb 18, 2024 · The GS method and non-optimized random phase results are compared by applying an equal number of TM (24 binary holograms). The Random results are illustrated by dot line because they are not ... WebMay 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.

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WebIOPscience WebIn order to optimize computer-generated holograms (CGHs) for three-dimensional objects, an extension of the well known Gerchberg-Saxton algorithm is used. Optical reconstructions using an electrically addressed twisted-nematic liquid crystal display are presented. For arbitrary CGHs, reconstructing 3D-objects, we will discuss the problems and ...

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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. WebMar 16, 2024 · The calculation conditions are as follows: hologram size 1024 × 1024 pixels, 532 nm wavelength, pixel pitch of 8 μ m, and a propagation distance of 0.2 m between the hologram and object planes. We used the angular spectrum method for …

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 …

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. how big is an average ovaryWebWe 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 … how big is an average ratWebIn 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 … how big is an average stomachWebJan 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 … how big is an average tiny houseWebSep 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) … how big is an average starWebFeb 1, 2024 · For comparison, we generated three holograms of the same resolution and the same intensity distribution using the sequential G-S algorithm with 20 iterations and by using simple multiplexing of random phase holograms for each individual plane of … how many nukes do nato haveWebFeb 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 … how big is an average yacht