Complex light modulation for lensless image projection

Makowski, Michał; Siemion, Agnieszka; Ducin, Izabela; Kakarenko, Karol; Sypek, Maciej; Suszek, Jarosław; Wojnowski, Dariusz; Jaroszewicz, Zbigniew; Kołodziejczyk, Andrzej

doi:10.3788/col201109.120008

Cited by 30 publications

(21 citation statements)

References 4 publications

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“…It is important to position the SLMs with pixel precision and not to introduce any aberrations to the wave propagating from one SLM to another. For these reasons, the simple imaging of one SLM onto the surface of the other with 1:1 magnification (relay optics) usually introduces too much error and makes the experiment very difficult to adjust [32]. The lack of additional optical elements requires that the CGH computation algorithms take into account the nonzero distance between the SLMs, as seen in Figure 20.…”

Section: Complex Modulation Methodsmentioning

confidence: 99%

Experimental Aspects of Holographic Projection with a Liquid-Crystal-on-Silicon Spatial Light Modulator

Makowski¹

2019

Holographic Materials and Applications

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Dynamic electroholography is a suitable and promising technology of image display for future projection and near-eye displays. Until a new phase modulation technology is introduced, practical research assumes the use of pixelated spatial light modulators based on liquid crystals with electronically controlled birefringence leading to a controllable refractive index. Such an approach allows for university grade development and testing of holographic computation methodology, but its limitations and drawbacks currently disable the massive application in consumer electronics. This chapter describes the differences between the behavior of the modulator as expected from Fourier optics and that observed in practical optical experiments. Moreover, practical hints and proven techniques of overcoming selected hardware issues of the chosen liquid-crystal-on-silicon (LCoS) phase modulators are given. The smart combination of the described techniques could allow more precise operation of spatial light modulators with a higher agreement with numerical simulations, especially for holographic projection of colorful images.

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Section: Complex Modulation Methodsmentioning

confidence: 99%

Experimental Aspects of Holographic Projection with a Liquid-Crystal-on-Silicon Spatial Light Modulator

Makowski¹

2019

Holographic Materials and Applications

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“…The study of coupling phase and amplitude SLMs in the realization of diffractive optical elements has been conducted by Stolz et al [58] Tudela et al [59], and [60], [61]. More recently, Makowski et al have extended the principles, and implemented a color holographic projection system [62].…”

Section: A General View On Holographic Display Systemmentioning

confidence: 98%

Review on the State-of-the-Art Technologies for Acquisition and Display of Digital Holograms

Tsang

Poon

2016

IEEE Trans. Ind. Inf.

101

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Optical holography for recording threedimensional (3-D) scenes can be traced back to the early sixties. Since then, the art of holography has been applied in many areas, primarily as a tool for 3-D imaging, processing, and display. Extension of optical holography to other disciplines, such as optical computing and encryption, has been explored, but the scope of development is relatively limited. However, with the rapid advancements in electronics, computing, and material science technologies, most of the optical processes can be substituted with numerical or digital hardware means, thus leading to the emergence of digital holography. A typical digital holography framework can be encapsulated into three major stages, namely the input, processing, and output stages. The input and output stages are gatekeepers connecting the optical and digital worlds, without which the study on digital holography could only be restricted to theoretical and numerical analysis. In the past few decades, numerous research works have been conducted on these two important areas. In this paper, we shall provide a review on the recent development in these two important areas of digital holography. Selected pieces of important and popular works on the acquisition and display of digital holograms will be reported.Index Terms-Computer-generated holography (CGH), digital holography (DH), hologram acquisition, hologram display.

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“…But the problem is that the SLMs are incapable of displaying a full complex function, because the present SLM technology allows them to be operated either in amplitude mode or in phase-only mode, not both. Thus a complex function is displayed using two SLMs, either displaying amplitude and phase or the real and imaginary parts of the function [13,14]. The complex function can also be displayed with a single SLM by generating double-phase holograms [15][16][17] or by two or more space shifted amplitude holograms [18].…”

Section: Opto-electronic Reconstruction Of Digital Hologrammentioning

confidence: 99%

Three-dimensional display system using near on-axis, phase-only digital holography

Samsheerali¹,

Khare²,

Joseph³

2015

Appl. Opt.

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We propose a method for carrying out three-dimensional (3D) display based on single-shot digital holography. The 3D display is realized from a digital hologram (DH) by displaying the complex function recovered through the constrained optimization approach on a phase-only spatial light modulator (SLM). A DH of a multiplane object is recorded in a near on-axis configuration, and the complex function corresponding to the object in the hologram plane is recovered. The recovered function is converted into a phase-only function, and it is displayed on a phase SLM. The optical reconstruction through simple diffraction from the SLM reproduced the 3D scene, and the image reconstructed at each plane has been observed.

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Complex light modulation for lensless image projection

Cited by 30 publications

References 4 publications

Experimental Aspects of Holographic Projection with a Liquid-Crystal-on-Silicon Spatial Light Modulator

Experimental Aspects of Holographic Projection with a Liquid-Crystal-on-Silicon Spatial Light Modulator

Review on the State-of-the-Art Technologies for Acquisition and Display of Digital Holograms

Three-dimensional display system using near on-axis, phase-only digital holography

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