Optimized random phase only holograms

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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 … 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 ...

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

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 … WebPhase-Only Holograms. Obtaining a desired wavefront in the focal plane requires introducing the appropriate wavefront in the input plane. Most lasers, however, provide … flocking carpet

Generation of non-iterative phase-only hologram based on a hybrid phase …

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) … 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 … 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 … flocking cars

(PDF) 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. WebJan 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 … flocking channelWebMar 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 … great lakes testing services columbus ohio

"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 … " - Optimized random phase only holograms

Optimized random phase only holograms

(PDF) Novel approach based on stochastic gradient descent for ...

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 … WebNov 8, 2024 · Optimized random phase tiles for non-iterative hologram generation In this work, we introduce a technique for fast, high-quality, non-iterative generation of phase …

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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 ... 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 …

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. 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 …

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)...

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 ... great lakes testing services indianapolisWebNov 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. … flocking carpet tile factoryWebA 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 … great lakes textiles solonWebFeb 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 … flocking chargeWebFeb 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 ]. flocking carpet tile productsWebIOPscience flocking curtain supplierWebWe 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 … flocking crazy farm