Optimized random phase only holograms

Author: jsnl

August undefined, 2024

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. … 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.

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

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 ... 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) … headphone jack on dslr

Compression protocol for optimized random phase color …

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 … 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 … WebIOPscience headphone jack on hp laptop not working

Optimized random phase only holograms. - Abstract - Europe PMC

Generation of patterned-phase-only holograms (PPOHs).

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. 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 … headphone jack only plays one sideWebAn 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 … gold shop martinez ga

"WebPhase-Only Holograms. Obtaining a desired wavefront in the focal plane requires introducing the appropriate wavefront in the input plane. Most lasers, however, provide … " - Optimized random phase only holograms

Optimized random phase only holograms

Pattern-adaptive error diffusion algorithm for improved phase-only ...

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 … 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.

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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 … 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.

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 … 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 ...

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 … 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 …

WebSep 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) …

WebFeb 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 … gold shop mainzWebAug 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 … gold shop manchesterWebJan 27, 2024 · Phase holograms [ 18, 19, 20] allow for higher DE value than their amplitude counterparts. This type of hologram is commonly synthesized by iterative methods such as the Gerchberg–Saxton algorithm [ 21 ]. Phase holograms are reconstructed using phase liquid crystal spatial light modulators [ 22 ]. gold shop maryboroughWebJan 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 … headphone jack on iphone 13WebNov 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. headphone jack on kindle fireWeb1. 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 … gold shop mannheimWebA 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 … headphone jack on iphone 11