Optimized random phase only holograms

WebA 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 … WebJan 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 ].

Optimized random phase only holograms

WebNov 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. 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. chv43021 bridgepoint c https://daviescleaningservices.com

Optimized random phase encryption

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 … 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 ... 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. dfw children\u0027s surgery center dallas

Optimized random phase only holograms in the Fresnel domain

Category:Optimized random phase only holograms in the Fresnel domain

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Optimized random phase only holograms

Optimized random phase only holograms in the Fresnel …

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 … 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) …

Optimized random phase only holograms

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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 … 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 …

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 … 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 …

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 … 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 …

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 …

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 … chv43034 scott roadWebWe 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 … dfw children\\u0027s surgery center dallasWebJan 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 ... chv43021 bridgepoint c richmond bcWebNov 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. chv43036 northgate cheWebFeb 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 … chv43022 200th street langleyWebFeb 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 ... chv43021 bridgepoint c richmondWebSep 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 … chv43022 200th street langley bc