This PDF file contains the front matter associated with SPIE Proceedings Volume 13067, including the Title Page, Copyright information, Table of Contents, and Conference Committee information.

In 360° color three-dimensional (3D) holographic display, numerous color computer-generated holograms (CCGH) are required to achieve compact distribution of view window on the viewing circumstance band [1]. However, traditional look-up-table methods cannot meet the needs of massive computing. This paper proposes a convolutional symmetric compressed look-up-table (CSC-LUT) method to accelerate CCGH computation based on the Fresnel diffraction theory and LUT. The proposed method can achieve one-time high-quality fast generation of CCGH by utilizing dynamic convolution operation, which is divided three processes. Firstly, the pre-calculated data of maximum horizontal modulation factor is compressed in 1D array by coordinate symmetry. Then, the test object is resampled to satisfy convolutional translation invariance. Finally, the dynamic convolution operation is used to simplify CCGH computation process rather than the point-by-point computation. Numerical simulation and optical experimental results show that our proposed method can achieve faster computation speed, higher reconstruction quality and wider application compared to conventional SC-LUT method. The further optimization method for parallel acceleration on the GPU framework can achieve real-time (>24fps) color holographic display corresponding to three perspectives of a 3D scene.

In contemporary art exhibitions, installation art occupies a significant position, displaying diversity in theme selection, cultural orientation, value positioning, medium application, emotional direction, and creative methods. Hologram, as a visual art medium emerging from the fusion of science and art, is characterized by its innovativeness, exploratory nature, and experimental qualities. This paper focuses on the construction of holographic art installations, discussing in detail the five elements of holographic installation art construction and the seven-step production process of holographic installation artwork. It includes an in-depth analysis of the holographic installation artwork "Within Reach" as a case study.

This study delves into the emotional engagement elicited by displaying holograms in museum settings, offering a comprehensive analysis of visitors’ emotional responses and the technological features that influence them. Utilising a qualitative approach complemented by a TF-IDF analysis, the research gathered data from diverse participants who experienced holographic exhibits. The study revealed a range of emotional responses, with ‘Curiosity’ and ‘Amazement’ being predominant, signifying the ability of the display of holograms to enhance visitor engagement and learning experiences significantly. Key technological aspects of holography, such as display method, colour, and three-dimensionality, were crucial in eliciting strong emotional responses and deepening understanding of the exhibit content. The study also highlighted the long-term impact of these experiences, suggesting that the display of holograms can leave a lasting impression and foster sustained interest in museum visits. This study enriches the field of museology by shedding light on the emotional dimensions of visitor interactions with holographic technology. The findings reveal the significant potential of holography to deepen visitor engagement, suggesting that, when effectively implemented, the display of holograms can significantly elevate the museum experience. This research highlights the importance of understanding and catering to visitors’ emotional and experiential needs in the evolving landscape of museum exhibit design.

Bonsai, an art form that condenses nature into a miniature scale, encapsulates not only the vastness of the world within a limited space but also mirrors the inner world of humans. Holograms, as mediums that record the light wave information of objects, are seen as creations of light, capable of replicating everything. This study aims to transcend traditional narrative methods in bonsai art by integrating the practice of bonsai with holographic imaging. By doing so, it seeks to create bonsai works with a novel aesthetic, offering viewers an entirely new context for contemplation and experience. Based on artistic practice, this paper presents three experimental sets of holographic art works. It also summarizes four advantages of holographic technology in the re-creation and innovation of bonsai art, analyzed from an interdisciplinary perspective.

The concept of imperfection, where perfection itself is an imperfection, aligns with the aesthetic of glitch art in holographic art. Originating in the 1960s as an integration of science, technology, and art, the creation of holograms requires meticulous craftsmanship in optical laboratories, blending specific technical skills with extensive practical experience. This paper introduces glitch art within the realm of holographic art and explores its historical significance in holograms. It identifies 4 key factors, stability during exposure, control of exposure parameters, path length difference control and post-processing techniques, that commonly induce glitches. Additionally, the paper examines recent glitch-infused holograms encountered by the author, thereby enhancing the understanding of glitches as a unique artistic expression within holographic art. This exploration sheds light on the technical aspects of hologram creation and contributes to the evolving narrative of digital art in contemporary practice.

Research is to further increase the display size of the original 3D display system to achieve a better display effect. In order to achieve our goal, we adopted a new method to achieve large-area rotation display and at the same time reduce the noise generated by rotating parts during high-speed rotation. In this study, the relevant technology of magnetic levitation bearing is used for reference[1] and the magnetic bearing is mainly used to offset the gravity of the intermediate turntable and reduce the noise generated by friction and the brushless motor is used to improve the speed of the turntable, hoping to obtain better imaging effect. At the same time, high-precision sensors are used to read the rotation speed and rotation Angle of the magnetic levitation bearing.

In this paper, we report a stable processing method to farbricate the nickel disc and polycarbonate(PC) disc with massive character code and address code in a ϕ120mm master disc. Currently, the optimum laser intensity is found to be 45% for exposure step. The micropore size remains the same size during the electroplating indicating the excellent stability and reliability of the process. In addition, the demolding process during the production of optical disc is smooth due to the controlled angle between photoresist and nickel surface. However, the height of microstructure boss on the optical disc after injection molding is about 10-15nm smaller than we expected.

High-performance photopolymers are the key to promote the development of holographic optical waveguides in the field of AR. In this study, through introducing high refractive index monomers and low refractive index fluoroelastomers into the formulation of a photopolymer, both transmission and reflection volume holographic gratings (VHGs) with high Δn can be recorded. In addition, the transmittance of the VHGs within 400~800 nm can reach 96% after photobleaching. The results indicate the photopolymer has great application potential to prepare VHGs for AR.

Now the era of big data has arrived, and there is an urgent need for high storage capacity storage solutions to store large amounts of data. As a new generation of storage technology, holographic optical storage has the advantages of large data storage capacity, fast transmission speed, read-write parallelism and so on. The storage material for holographic storage should have the characteristics of fast response, high signal-to-noise ratio, high diffraction efficiency and high stability. Phenanthrenequinone-doped poly (methyl methacrylate) (PQ/PMMA) photopolymer is a common storage material, which has the advantages of high diffraction efficiency, inexpensive and simple preparation. Currently, PQ/PMMA is mainly prepared manually. The reproducibility of the preparation process faces challenge due to human errors. Therefore, we designed an automatic PQ/PMMA preparation device, which can effectively eliminate the differences caused by human factors. We have verified through experiments that materials prepared automatically have better stability than those prepared manually. Among the prepared single sheet materials by automatic preparation device, we measured that the difference in diffraction efficiency at different positions is within 10%. The automated experimental platform provides assistance for the stable preparation of materials

Photopolymer is well-recognized as an ideal holographic recording medium, but there is holographic reciprocity law failure in pulse exposure. In this study, the holographic properties of the samples containing an acrylate dendritic monomer with high refractive index (DM-1, n=1.634) are investigated under a 532 nm single-pulse or multi-pulses exposure. The effects of pulse number, spatial frequency, thickness and exposure dosage on diffraction efficiency are discussed. The diffraction efficiency of recorded grating in a sample containing 4% DM-1 (0.5 mm thickness) reaches 77.2% under the 100 pulses exposure. Besides, a grating with diffraction efficiency of 1.35% and narrow selection angle of 0.11° can be recorded in this sample under a single-pulse exposure (8.7 mJ/cm² exposure dosage), indicating its’ potential in ultrafast holography.

The frame frequency matching of the Digital Micro-mirror Device (DMD), the acousto-optic modulator (AOM) and high-speed camera can realize the holographic high-speed reading under the reference light changing scene, which greatly improves the data reading speed. In this work, the frame frequency matching to achieve high-speed reading is related to four factors: the resolution and exposure time of the high-speed camera, the duty ratio of AOM, and the phase difference between the signals sent by AOM and DMD. Through the research of the exposure time and resolution of high-speed cameras, the maximum synchronous frame rate of DMD and high-speed cameras can achieve 18KHZ. By synchronizing the frame frequency of both DMD and AOM trigger signals with the signal generator, controlling the duty ratio of AOM and the phase difference of the trigger signals sent to DMD and AOM can enable the high-speed camera to read the reproduction data page near the data recording point, avoiding the waste of storage space. The analysis of the experimental results shows that the camera can read clear information under the conditions of the incident optical power density is 32μw, the AOM duty ratio is larger than 10%, and the phase difference between AOM and DMD is 26°. The realization of DMD, high-speed camera and AOM frequency matching will effectively ensure the reading speed and decoding accuracy of holographic stored data

Displacement multiplexing can improve the storage density of collinear holographic data storage systems and is an essential multiplexing method. This article introduces the use of dark reaction phenomena in recording media to improve the displacement multiplexing effect of collinear holographic data storage systems, and achieves a multiplexing distance of 5 μm.

In the digital age, the volume of data is expanding exponentially, rendering it as a fundamental asset. Consequently, the need for storage systems that possess substantial capacity, affordability, exceptional performance, and unwavering dependability has become increasingly pressing. In response to this demand, storage systems have extensively embraced erasure codes, particularly the wide stripe erasure codes, owing to their remarkable storage efficiency and reliability. However, this paper found that the encoding and decoding performance of wide stripe erasure codes significantly deteriorates compared to narrow stripe erasure codes, when using mainstream erasure code acceleration libraries. In order to gain a comprehensive understanding of this phenomenon, extensive experimentation was conducted to test the performance of encoding and decoding process of erasure codes. Further, hardware events during erasure code calculation were analyzed. The results show that the root cause of performance degradation is the increasing L3 cache misses which saw a 240% increase given a set amount of encoding data

This paper proposes a fabrication method for realizing all-optical AND and NOR logic gates based on polarization holography. During the recording process, two specially designed polarization holograms are recorded at the dual-region position of the polarization-sensitive material. During the reconstruction process, two reading waves in different directions are used as two input lightwaves. The background lightwave is added to the propagation direction of the two reconstructed waves, and the two reconstructed waves superimposed with the background lightwave are used as two output lightwaves. The light intensity of the two output lightwaves, together, defines the logic signal of the final output. The all-optical AND and NOR logic gates fabricated using this method have the advantages of simple structure, low cost, and fast response.

In this paper, We first analyze the challenges for the collinear holographic data system to adopt the rotating disc mechanism to decrease the complexity and improve the data throughput. Then we propose a technique design to address them. The implementaion gives the details of major control procedures and the necessary optimizations for the control algorithm. Finally, the evaluation results show the effectiveness of the design.

Linear polarization holography based on tensor theory has yielded numerous intriguing discoveries and applications. Utilizing theories such as null reconstruction, applications beneficial for holographic optical storage have been realized, with dual-channel polarization multiplexing being one of them. However, previous research has found deviations in the grayscale ratios on reconstructed images compared to original images, especially when uploading grayscale images with higher levels, such as 4-level grayscale images. This study conduct experiments using different recording methods to identify the source of grayscale crosstalk from a single test image. The results indicate that the recording modes, whether co-polarized or orthogonal polarized, do not significantly disrupt amplitude recording.

Holographic data storage systems are candidates for information recording due to their large storage capacity and high transmission rate. In this paper, a phase modulation holographic storage technology with three-grayscale encoding is proposed and implemented. According to the experimental results, if two phase codes in the three-grayscale encoding are relatively close, the performance of phase reconstruction would be degenerated.

In the field of holographic storage, poly (methyl methacrylate) (PQ/PMMA) photopolymer doped with phenanthraquinone has the characteristics of controllable material thickness, polarization sensitivity, and simple manufacturing process, demonstrating good research value and application prospects. This paper prepared PQ/PMMA materials with thicknesses of 0.3, 0.5, 1.0, 1.5, 2.0, 3.0, and 4.0 mm, and analyzed the holographic characteristics of PQ/PMMA materials with different thicknesses, such as diffraction efficiency, photosensitivity, refractive index modulation, etc. By comparing the holographic performance parameters of materials with different thicknesses, it was found that as the thickness increases, the saturation diffraction efficiency shows a trend of first increasing and then decreasing. The 3.0 mm thick PQ/PMMA material has higher saturation diffraction efficiency and photosensitivity, providing a basis for optimizing material preparation parameters.

The reconstruction process of polarization holography needs to strictly meet the Bragg condition. This paper aims to study the Bragg condition in the reconstruction process of polarization holography. The Bragg mismatch will have a negative impact on the reconstructed recording information. It not only affects the diffraction efficiency of there constructed light in the original reference light direction, but also affects the reconstructed recording image. Based on PQ/PMMA, we studied the variation of the diffraction efficiency of the polarized hologram and its effect on there constructed recorded image under the condition of deviating from the Bragg condition.

Exposure intensity affects the diffraction intensity and bit error rate of holographic materials. Now we design the experiment, unify the exposure amount, adjust the intensity of the information light and the recording time, and observe the bit error rate and diffraction intensity after the dark reaction for 1 minute. We verify that holograms with high intensity and short exposure time and dark reaction after 1 minute have lower bit error rate and higher diffraction intensity

The modulation of light is important in phase holographic data storage, and different spatial light modulators have different modulation capabilities for light. In this study, a lens less non-interference phase reconstruction system based on deep learning is applied to evaluate the performance differences of different spatial light modulators in holographic data storage. The performance differences are evaluated, which include the deep learning results versus pixel crosstalk results for phased holographic optical storage.

With the rapid development of information technology, the amount of data has shown explosive growth. The traditional magnetic storage and optical storage can no longer gradually meet the needs of data storage. Holographic data storage breaks through the mode of two-dimensional data storage and stores data in the form of three-dimensional volume, which can improve the data storage density by one dimension and bring ultra-fast data transfer rate at the same time. However, to promise holographic data storage work well, the servo system should be used in practice to avoid the effect of vibration.

Polarization holography has important research significance and application prospect. UV curing has a certain effect on polarization hologram. Using PQ/PMMA as the storage medium, the effects of UV curing on the quality and storage time of generated vector light field in the medium were studied.