Research on Issues about Reconstructed Holographic Image Based on a Pixelated Spatial Light Modulator

Chuan, 沈川 Shen; Cheng, 张成 Zhang; Kaifeng, 刘凯峰 Liu; Sui, 韦穗 Wei; Hong, 程鸿 Cheng; Qing, 张庆 Zhang

doi:10.3788/aos201232.0309001

Cited by 6 publications

(3 citation statements)

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“…In this holographic display system, both the multilevel diffracted light resulting from the PLM's structure and the diffracted image corresponding to the phase hologram are focused onto the back focal plane of a lens. Shen et al 9 proposed a method that involves superimposing a focused spherical wave's phase into a phase hologram.…”

Section: Methods For Eliminating the Zero Diffraction Ordermentioning

confidence: 99%

Colorful field sequence laser display and pixel alignment method based on single-chip phase light modulator device

Guo,

Yuan

et al. 2024

Emerging Digital Micromirror Device Based Systems and Applications XVI

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Texas Instruments has developed a phase light modulator (PLM) based on Micro-Electromechanical System (MEMS). This modulator offers several excellent advantages, including high refresh rate, compact optical path, and high optical efficiency, making it well-suited for applications in laser displays. In this paper, we divide the PLM into three regions and illuminate them with corresponding color laser light. The diffracted image is eventually reproduced and superimposed at the image plane in order to obtain a colorful display. We measured the display indicators such as inherent resolution, coincidence error, contrast ratio, uniformity, optical efficiency and diffraction efficiency of this methodology. The advantages of this methodology lie in its compact optical path and excellent optical efficiency. This work enhances the development of single PLM for color laser display applications in field sequence, including holography and volume display.

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Section: Methods For Eliminating the Zero Diffraction Ordermentioning

confidence: 99%

Colorful field sequence laser display and pixel alignment method based on single-chip phase light modulator device

Guo,

Yuan

et al. 2024

Emerging Digital Micromirror Device Based Systems and Applications XVI

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“…Considering the Fourier transform property of the 4f system, the incident light can be modulated in the Fourier plane with a SLM. However, devices have some limitations, such as rasterized structures, relatively large pixels, fill factor less than 100%, difficulty of alignment, and high cost [28]. These drawbacks limit the performance of the SLM and result in problems such as slow speed and low accuracy in the phase retrieval system.…”

Section: Coded Diffraction Patterns Design Based On Electrically Tuna...mentioning

confidence: 99%

Large-scale phase retrieval from coded diffraction patterns with electrically tunable lens

Zhang¹,

Zhang²,

Wang³

et al. 2022

Phys. Scr.

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General optical detection devices rely on converting photons to electrons (current), and do not allow for direct recording of the phase due to the high oscillation frequency. As so, the missing phase can only be recovered from the intensity measurements. The emerging non-convex phase retrieval algorithm, represented by the Wirtinger Flow (WF) algorithm requires multiple-shot coded diffraction patterns (CDPs) for accurate recovery. To achieve the real-time acquisition for multiple CDPs, this paper proposes a 4f imaging system based on an electrically tunable lens (ETL), which can be used for real-time acquisition of multiple-shot CDPs, and can take the advantages of highspeed, high-resolution, extended depth-of-field, high-sensitivity and low-cost imaging. In this paper, the performance of 4f-ETL based imaging system for phase retrieval with multiple CDPs is compared under different iteration times, different object size, different numbers of masks and different noise levels. Numerical experiments demonstrate the effectiveness and superiority of our proposed ETL-based imaging system, and ETL allows variable-distance focusing of imaging and display systems without mechanical structures, which reduces the mechanical complexity and power consumption, improves acquisition speed.

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“…式中 t( ) u, v 表示 SLM 的透射率(反射率)函数，ℱ{ } 表示傅里叶变换。最终的衍射图样中心出现的一个亮斑，称为零级光，是由像素之间非活动区域产生的光的反射或透射造成的。除此之外，最终的图样会产生显著的衍射效应，即产生多级衍射现象 [80] 。像素结构造成全息图傅里叶变换的谐波复制现象，即多级衍射全息再现像。多级衍射全息再现像的能量分布受到 SLM 单个像素衍射因子的调制。零级光和多级衍射光的存在影响了全息重构的视觉感受并且降低了光能的利用率。Arrizon 等 [81] 分析了具有有限填充因子的 SLM 的衍射效率问题。为了解决 SLM 像素结构引起的零级光、多级衍射光和全息图对应的多级衍射再现像对于全息重构的干扰，在全息投影应用中，目前大多数的研究立足于滤波的方法 [82][83] ，即采用加载等效透镜相位到全息图，达到分离重构图像与零级光位置的目的，再利用滤波器进行滤除零级光。也可以通过设置 4f 系统进行频域滤波从而消除高级衍射光的影响 [84] 。此类滤波的方法与电寻址 SLM 的可编程特性相结合，可以获得简单有效的结果，但是降低了光能利用率。而通过引入校正光束与零级光束相互干涉抑制零级光影响的方法提供了另一种思路 [85] 。近期，利用相位压缩技术抑制零级光影响的研究工作也是在此方法的基础上开展的 [86] 。此外，数字全息中也有诸多消除零级衍射的研究工作 [63,87]…”

Section: -unclassified

Survey on Methods and Systems of Color Holographic Display

Chuan¹,

Sui²,

Kaifeng³

et al. 2014

激光与光电子学进展

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Color holographic display is an important aim of holographic video display technology. In this paper， an overview of the issues about the methods and system design of color holographic display based on spatial light modulator (SLM) is presented. Firstly, the basic principles that three monochromatic holographic images are combined into a color image are introduced. The methods of generating holograms are analyzed and the comparison of three kinds of holograms including optical holograms, digital holograms, and computergenerated holograms (CGHs) is achieved. Secondly, the choice of SLM to design a color holographic display system and the phase modulation characteristics for multi-wavelength illumination are discussed. It is feasible to employ either red, green, and blue (RGB) lasers or light-emitting diodes (LEDs) as illumination source in practice system. Then, the configurations of color holographic display system by use of different methods including time division multiplexing, space division multiplexing, spatial division, and spatial multiplexing are described, and it is pointed out that the color holographic reconstructions are corrupted by effects arising from the discrete nature of SLM and the chromatics. Finally, the prospective development of color holographic display technology is given.

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Research on Issues about Reconstructed Holographic Image Based on a Pixelated Spatial Light Modulator

Cited by 6 publications

References 0 publications

Colorful field sequence laser display and pixel alignment method based on single-chip phase light modulator device

Colorful field sequence laser display and pixel alignment method based on single-chip phase light modulator device

Large-scale phase retrieval from coded diffraction patterns with electrically tunable lens

Survey on Methods and Systems of Color Holographic Display

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