Optimized random phase only holograms

WebApr 17, 2024 · A fast and non-iterative method for generating a phase-only hologram, hereafter referred to as the patterned-phase-only hologram (PPOH), is reported in this paper. Briefly, a phase mask with a periodic phase pattern is added to the source image, and converted into a hologram. 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 …

Frequency-based optimized random phase for computer …

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 … 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) … shun whetstone 6000 https://andysbooks.org

(PDF) Optimized random phase only holograms

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 … 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 ... 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 ]. shun wiktionary

Frequency-based optimized random phase for computer …

Category:Generation and experimental reconstruction of optimized …

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Optimized random phase only holograms

High-contrast, speckle-free, true 3D holography via binary CGH

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. WebAug 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 …

Optimized random phase only holograms

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WebIOPscience 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 …

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 … 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 …

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 … 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 …

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 …

WebJan 1, 2024 · PDF On Jan 1, 2024, Chenhang Shen and others published Novel approach based on stochastic gradient descent for controlling the reconstructed phase randomness of computer-generated holograms ... the outsiders book bannedshun williamsWebPhase-Only Holograms. Obtaining a desired wavefront in the focal plane requires introducing the appropriate wavefront in the input plane. Most lasers, however, provide … the outsiders book businessWebFeb 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 … shun whetstone 1000/6000WebA DNN of (Ishii et al., 2024) converts a phase-only hologram computed using the random phase-free method in an optimized phase-only hologram. Two layers for computing the forward and inverse scaled diffraction … the outsiders book by william thorndikeWebThe 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. shun williams sonomaWebWe 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 … the outsiders book by s.e. hinton