A speckle noise suppression method in phase-only holographic display based on an improved Gerchberg–Saxton algorithm

Hua, Minjie; Chen, Yun; Zhang, Tianshun; Zou, Wenlong; Wu, Jianhong

doi:10.1016/j.ijleo.2021.168407

Cited by 9 publications

(2 citation statements)

References 28 publications

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“…Meanwhile, by assessing the SC of the areas marked with red boxes, the SC of the optimized scheme results is reduced by 79% and 82% compared to the results of RPM, and speckle noise is significantly suppressed. To further improve the quality of the reconstructed image, the relationship between the hologram pixels and the target object pixels can be controlled 24 . We propose two schemes: first, the hologram sampling points remain unchanged, and the object sampling points are appropriately reduced under the condition of satisfying the window while increasing the resolution of the reproduced image by using a mosaic method, and second, the object sampling points remain unchanged, and the hologram sampling points are appropriately increased.…”

Section: Simulation Resultsmentioning

confidence: 99%

Optimization algorithm for amplitude-only hologram based on digital micromirror device

Chen¹,

Wu²

2023

Third Optics Frontier Conference (OFS 2023)

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An optimization algorithm for binary amplitude-only hologram (BAOH) based on the point source method (PSM) with the holographic viewing window (HVW) by using particle swarm optimization (PSO) is proposed. We convert the 256 grayscale levels of each pixel of the original image into an 8-bit binary format and sequentially extract the effective bits of each pixel to generate eight frames of binary original images. Then we introduce random constant phases to be optimized on the wavefront phase of the point source to superimpose the wavefront and generate a grayscale hologram with Burch encoding and binarize it. PSO algorithm is used to search for the optimized constant phase (OCPs) corresponding to each point source wavefront to generate an optimized BAOH. The grayscale representation of the reconstructed image is achieved by sequentially loading eight frames of BAOH on the digital micromirror device (DMD) while controlling the pulse width doubling the illumination of the laser. Simulation results show that the speckle noise of the reconstructed image using the proposed method is significantly suppressed compared with that using the random phase method (RPM), which demonstrates the feasibility of the proposed method.

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Section: Simulation Resultsmentioning

confidence: 99%

Optimization algorithm for amplitude-only hologram based on digital micromirror device

Chen¹,

Wu²

2023

Third Optics Frontier Conference (OFS 2023)

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show abstract

“…During the iterations, the amplitude in the signal domain is constrained while the amplitude in the freedom domain is set for freedom. In recent years, double-constraint GS algorithms are also introduced to suppress the speckle noise of the reconstructed images, where both amplitude and phase are constrained in the signal domain during the iteration process [18]- [20]. However, the reconstruction in the freedom domain is less controlled, leading to low diffraction efficiency.…”

Section: Introductionmentioning

confidence: 99%

Optimized Iterative Algorithm to Generate Computer-Generated Holograms Based on the Intermediate Angular-Spectrum Method

Liu

Wang

2022

IEEE Photonics J.

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The intermediate angular-spectrum method is an efficient way to calculate computer-generated holograms without zero-padding and cropping operation. In this paper, we present an optimized iteration algorithm to improve the reconstruction quality in the intermediate angular-spectrum method. The quadratic phase is multiplied with the target image as the initial complex amplitude distribution to suppresses the speckle noise and the freedom domain is introduced in the image plane to improve the reconstruction quality. Numerical simulations and optical experiments are performed to demonstrate that proposed method is an effective method for high-quality reconstruction. It is expected that proposed method could be widely applied in the holographic field in the future.

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Performance evaluation of Python and MATLAB for CGH generation using layer-based approach

Gupta,

Das,

Kumar

2024

J Opt

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A speckle noise suppression method in phase-only holographic display based on an improved Gerchberg–Saxton algorithm

Cited by 9 publications

References 28 publications

Optimization algorithm for amplitude-only hologram based on digital micromirror device

Optimization algorithm for amplitude-only hologram based on digital micromirror device

Optimized Iterative Algorithm to Generate Computer-Generated Holograms Based on the Intermediate Angular-Spectrum Method

Performance evaluation of Python and MATLAB for CGH generation using layer-based approach

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