Optimized random phase only holograms

Velez-Zea, Alejandro; Barrera-Ramírez, John Fredy; Torroba, Roberto

doi:10.1364/ol.43.000731

Cited by 57 publications

(16 citation statements)

References 11 publications

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“…Moreover, optimized random phase (ORAP) method 88 , which combined iterative algorithms and non-iterative algorithms, was also developed to implement the generation of POHs for arbitrary target images. This method consists of off-line calculation and on-line calculation as shown in Fig.…”

Section: Image Quality Enhancement and Speckle Suppressionmentioning

confidence: 99%

Review of computer-generated hologram algorithms for color dynamic holographic three-dimensional display

2022

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Holographic three-dimensional display is an important display technique because it can provide all depth information of a real or virtual scene without any special eyewear. In recent years, with the development of computer and optoelectronic technology, computer-generated holograms have attracted extensive attention and developed as the most promising method to realize holographic display. However, some bottlenecks still restrict the development of computer-generated holograms, such as heavy computation burden, low image quality, and the complicated system of color holographic display. To overcome these problems, numerous algorithms have been investigated with the aim of color dynamic holographic three-dimensional display. In this review, we will explain the essence of various computer-generated hologram algorithms and provide some insights for future research.

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Section: Image Quality Enhancement and Speckle Suppressionmentioning

confidence: 99%

Review of computer-generated hologram algorithms for color dynamic holographic three-dimensional display

2022

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“…Currently, there are two typies algorithms for generate POH, one is the iterative algorithms and the other is non-iterative algorithms. Non-iterative algorithms include phase mask-like methods [11][12][13][14], where the target image is multiplied with a phase mask on the image plane and then the phase of the complex amplitude on hologram plane is taken to reconstruct the target image, where the quadratic mask method mentioned in the references [15,16] can obtain a higher signal-to-noise ratio. Other noniterative algorithms, such as the Sampled Phase-Only Hologram algorithm [17] and the Complementary Phase-Only Hologram algorithm [18] are available for ensuring reconstruction quality still, they are computationally intensive and require a high-performance SLM.…”

Section: Introductionmentioning

confidence: 99%

A Hybrid Iterative Algorithm of Amplitude Weighting and Phase Gradient Descent for Generating Phase-Only Fourier Hologram

Min¹,

Yang²,

Du³

et al. 2022

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Reconstruction of target images from phase-only hologram (POH) has the advantages of high diffraction efficiency and no conjugate terms. The Gerchberg-Saxton (GS) algorithm is a classical algorithm applied to recover the phase, but it most likely stagnantes after a few iterations. This paper proposes a hybrid iterative algorithm of Amplitude Weighting and Phase Gradient Descent (AW-PGD) to generate a higher-quality POH. Firstly, the quadratic phase is used as the initial phase, zero-pads the periphery of the target image, and then multiplies the two to form the complex amplitude as the iterative initial value. During iteration, the amplitude of the reconstructed image is constrained by an adaptive dynamic exponential term in the signal region to improve the reconstruction accuracy, the constraint in the non-signal region is relaxed to reduce the computational effort at the same time; and the phase gradient descent technology is used to increase the iteration step and speed up the convergence. Finally, the target image amplitude is reconstructed based on the generated POH. The numerical simulation results show that the algorithm does not have a significant increase in time cost with better reconstruction quality than the GS, Weighted GS (WGS) and Adaptive Weighted GS (AWGS) algorithm.

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“…With the development of spatial light modulator (SLM) and the high diffraction efficiency of SLM to phase-only hologram (POH) [20], [21], the high quality reconstruction of cylindrical POH is a valueable issue to study. In the process of generating cylindrical POH, random phase is often introduced to simulate the diffuse reflection phenomenon on the object surface and increase the viewing angle [22], [23]. However, serious interference effect occurs in a reconstructed image due to the use of the random phase, which results in speckle noise and degrades the reconstructed image.…”

Section: Introductionmentioning

confidence: 99%

Speckle Suppression Using Cylindrical Self-Diffraction for Cylindrical Phase-Only Hologram

Jin

Wang

et al. 2021

IEEE Photonics J.

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In the reconstruction of cylindrical phase-only hologram (POH), speckle noise caused by the addition of random phase is rarely discussed. Although some speckle noise suppression algorithms have been proposed for planar POH, it does not work well if they are directly applied to cylindrical POH. To solve this issue, the cylindrical self-diffraction iteration (CSDI) algorithm is proposed. This is an iteration algorithm based on the cylindrical selfdiffraction model which is a special case of the cylindrical backward-propagation model at a limit condition. Simulation results show that CSDI can suppress speckle noise and improve the quality of reconstructed images significantly. Furthermore, the proposed CSDI algorithm outperforms conventional algorithms, which work well in planar POH and are directly applied to cylindrical POH, in suppressing speckle noise for cylindrical POH. To our best knowledge, the models of cylindrical backward-propagation and cylindrical self-diffraction as well as the concept of CSDI are firstly proposed and applied to speckle suppression of cylindrical POH.

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Optimized random phase only holograms

Cited by 57 publications

References 11 publications

Review of computer-generated hologram algorithms for color dynamic holographic three-dimensional display

Review of computer-generated hologram algorithms for color dynamic holographic three-dimensional display

A Hybrid Iterative Algorithm of Amplitude Weighting and Phase Gradient Descent for Generating Phase-Only Fourier Hologram

Speckle Suppression Using Cylindrical Self-Diffraction for Cylindrical Phase-Only Hologram

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