Optical Review最新文献

{"title":"Enhancement of spatial noise tolerance in single-pixel imaging with a feature-extended deep neural network","authors":"Taku Hoshizawa, Shinjiro Kodama, Chihiro Sato, Tomoaki Mizoguchi, Moe Sakurai, Eriko Watanabe","doi":"10.1007/s10043-025-00991-y","DOIUrl":"https://doi.org/10.1007/s10043-025-00991-y","url":null,"abstract":"<p>To compensate for time-fluctuating spatial noise and reconstruct an object image, a deep learning-based single-pixel imaging (SPI) system using a neural network consisting of five transposed convolutional layers and three convolutional layers has been developed. In the present study, we proposed a new image reconstruction method using deep learning with a feature-extended time-division pattern-learning (TDPL) network, which further increased the number of features in each layer to enhance the tolerance to time-fluctuating spatial noise. Simulations and experiments were performed to compare the performance of the proposed network with that of conventional methods, such as computational ghost imaging, Hadamard single-pixel imaging, deep convolutional auto-encoder network (DCAN), and TDPL network. We found that the image quality of the reconstructed image using the proposed method is superior to that of conventional methods in any environment with time-fluctuating spatial noise. For example, the quality of an object image reconstructed using the proposed method improved by − 0.037 and − 0.014 in a root-mean-square error and + 0.083 and + 0.005 in a structural similarity compared to that using the DCAN and TDPL network, respectively, under time-fluctuating spatial noise with a standard deviation of 0.5. Therefore, the proposed deep learning-based SPI system with a feature-extended TDPL network is expected to be applied to various imaging or observation in an environment where conditions are likely to change, such as astronomical observations, remote monitoring, and optical wireless communications.</p>","PeriodicalId":722,"journal":{"name":"Optical Review","volume":"71 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145009522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pupil expansion prism and beam splitter array waveguide for high luminance and high resolution head-mounted display","authors":"Toshiteru Nakamura, Takuma Kuno, Ryuji Ukai","doi":"10.1007/s10043-025-00997-6","DOIUrl":"https://doi.org/10.1007/s10043-025-00997-6","url":null,"abstract":"<p>Head-mounted displays (HMDs) for augmented reality (AR) require optical systems that deliver high luminance, high optical see-through performance, and high image resolution. Conventional two-directional pupil expansion using beam splitter array (BSA) waveguides often suffers from low light coupling efficiency and degraded image quality due to narrow coupling mirrors and wavefront disturbances caused by exposed mirror edges along the total internal reflection surface. We propose a novel HMD optical system that combines a pupil expansion (PE) prism with a one-directional BSA waveguide. The PE prism features an enlarged coupling surface, efficiently capturing light from the light engine. Importantly, the PE prism is designed to avoid exposed mirror edges in the optical path, thereby eliminating wavefront disturbances and enabling high-resolution virtual image projection. Within the PE prism, multiple ray paths are generated through complex reflections and transmissions via overlapping multi-mirrors. This multi-path propagation not only expands the eye-box orthogonally to the BSA waveguide, but also ensures uniform output luminance. A prototype HMD implementing the proposed method achieves high luminance (over 5000 cd/m²), high image resolution (MTF &gt; 58% at 10 cycles/degree), high optical see-through transparency (over 94%), and luminance uniformity (over 53%). These results demonstrate significant improvements over conventional BSA waveguide approaches.</p>","PeriodicalId":722,"journal":{"name":"Optical Review","volume":"30 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144930839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The interference of the evanescent mode of two Airy beams in near field","authors":"Ze Wang, Zhengling Wang","doi":"10.1007/s10043-025-00995-8","DOIUrl":"https://doi.org/10.1007/s10043-025-00995-8","url":null,"abstract":"<p>The exact analytical solution of the electric field of the Airy beam with a polarization in the <i>x</i>-direction is derived by the vector angular spectrum theory. And then, the evanescent interference of two symmetrically offset evanescent Airy beams is investigated by the angular spectrum theory in detail. Two separated Airy beams at the initial position will overlap and interfere due to the lateral self-acceleration. The <i>y</i>-axis interference field shows a superior stability and a slower decay compared to the <i>x</i>-axis. The interference optical field forms a spindle-shaped central optical field along the <i>y</i>-axis, and the intensity rapidly decays along the <i>x</i>-axis, and a small-scale scattered optical field is formed in the low-intensity regions on both sides. The result is useful to elucidating the formation mechanism and theoretical properties of the interference phenomenon of Airy beams.</p>","PeriodicalId":722,"journal":{"name":"Optical Review","volume":"63 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144930838","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design and performance of photon counting detector with charge coupling delay-line readout","authors":"Yalong Zhang, Yongan Liu, Xianghui Yang, Zhe Liu, Lizhi Sheng, Yue Li","doi":"10.1007/s10043-025-00982-z","DOIUrl":"https://doi.org/10.1007/s10043-025-00982-z","url":null,"abstract":"<p>Detectors based on cross delay-line (XDL) anodes with charge induction are widely applicable in space astronomical telescopes, deep space exploration, and fluorescence lifetime measurements. In this article, a three-dimensional structure XDL anode based on Printed Circuit Board (PCB) technology is proposed, which can conveniently realize high-resolution detection with a simple process and low cost. We theoretically studied the charge induction principle and established a model of the XDL anode through the finite element method. The model allows us to determine anode parameters, such as anode strip width, inter-strip distance, and substrate thickness, to optimize the output signal on the XDL anode, thereby indirectly affecting the resolution of the detector. Based on the experimental platform, we systematically characterized the key performance parameters of the detector. We conclude that the spatial resolution of the detector is better than 50 <span><span style=\"\"></span><span data-mathml='&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;mrow&gt;&lt;mtext fontfamily=\"Times\"&gt;&amp;#x03BC;&lt;/mtext&gt;&lt;/mrow&gt;&lt;/math&gt;' role=\"presentation\" style=\"font-size: 100%; display: inline-block; position: relative;\" tabindex=\"0\"><svg aria-hidden=\"true\" focusable=\"false\" height=\"2.913ex\" role=\"img\" style=\"vertical-align: -0.465ex; margin-top: -0.324ex; margin-bottom: -0.266ex;\" viewbox=\"0 -939.5 502.9 1254\" width=\"1.168ex\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"><g fill=\"currentColor\" stroke=\"currentColor\" stroke-width=\"0\" transform=\"matrix(1 0 0 -1 0 0)\"><text font-family=\"Times\" stroke=\"none\" transform=\"scale(52.083) matrix(1 0 0 -1 0 0)\">μ</text></g></svg><span role=\"presentation\"><math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mtext fontfamily=\"Times\">μ</mtext></mrow></math></span></span><script type=\"math/tex\">upmu</script></span>m and the non-linearity is less than 5<span><span style=\"\"></span><span data-mathml='&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;mi mathvariant=\"normal\"&gt;&amp;#x0025;&lt;/mi&gt;&lt;/math&gt;' role=\"presentation\" style=\"font-size: 100%; display: inline-block; position: relative;\" tabindex=\"0\"><svg aria-hidden=\"true\" focusable=\"false\" height=\"2.308ex\" role=\"img\" style=\"vertical-align: -0.368ex;\" viewbox=\"0 -835.3 833.5 993.6\" width=\"1.936ex\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"><g fill=\"currentColor\" stroke=\"currentColor\" stroke-width=\"0\" transform=\"matrix(1 0 0 -1 0 0)\"><use x=\"0\" xlink:href=\"#MJMAIN-25\" y=\"0\"></use></g></svg><span role=\"presentation\"><math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi mathvariant=\"normal\">%</mi></math></span></span><script type=\"math/tex\">%</script></span>. </p>","PeriodicalId":722,"journal":{"name":"Optical Review","volume":"16 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144930843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Robust multibook recording with signal beam phase optimization based on Gerchberg–Saxton algorithm for holographic data storage","authors":"Makoto Hosaka, Ryushi Fujimura","doi":"10.1007/s10043-025-00989-6","DOIUrl":"https://doi.org/10.1007/s10043-025-00989-6","url":null,"abstract":"<p>Owing to the rapid growth of digital information, demand for archival storage with high data transfer rate, large capacity, longevity, low power consumption, and low running cost has surged. Although holographic data storage (HDS) is considered as a promising candidate for next-generation archival storage due to its potential in these areas, it has not been released commercially due to difficulties in stable recording and reproduction across the whole recording area or multibook area. In this study, we proposed a robust multibook recording technique based on signal beam phase optimization using the Gerchberg–Saxton (GS) algorithm. We optimized the target distribution of the signal beam amplitude at the Fourier plane for the GS algorithm, considering the hologram recording and reproduction characteristics, such as DC suppression, inter-book-interference (IBI) reduction, and the signal-to-noise ratio (SNR). Optical simulation of multibook recording and reproduction shows that IBI can be properly reduced, and sufficient SNR can be retained even if 13.6% book misalignments occur during recording. In addition, combining the proposed technique with an accurate book alignment method could increase the HDS capacity by 33.9%.</p>","PeriodicalId":722,"journal":{"name":"Optical Review","volume":"19 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144930844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Noncontact detection of underwater ultrasound using laser light based on the self-coupling effect of a semiconductor laser","authors":"Keisuke Fukuyama, Norio Tsuda, Daisuke Mizushima","doi":"10.1007/s10043-025-00983-y","DOIUrl":"https://doi.org/10.1007/s10043-025-00983-y","url":null,"abstract":"<p>When a hydrophone with a vibrating membrane is placed in water, the ultrasonic waves to be detected diffract and reflect. Therefore, conventional hydrophones cannot accurately measure the sound field distribution. Another noncontact method for measuring the sound field distribution is the Schlieren method. However, this method requires meticulous optical axis adjustment using a Schlieren lens and a knife edge, and this method is not versatile. Therefore, a laser hydrophone, which uses the self-coupling effect of a semiconductor laser to detect ultrasonic waves without contact with the sound field, is developed, and the sound field is investigated. The optical system of the laser hydrophone is composed of only a few components. In addition, because ultrasonic waves can be detected using only a small amount of light, no optical axis adjustment is necessary. The frequency response of the laser hydrophone is flat. The upper limit of the detectable frequency is determined by the relationship between the large diameter of the laser beam and the frequency of the ultrasonic waves. The measured sound pressure distribution of the laser hydrophone qualitatively agreed with that of the simulation.</p>","PeriodicalId":722,"journal":{"name":"Optical Review","volume":"32 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144930494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dual coupled subwavelength triangular prism silver nanowire SPPs hybrid waveguide","authors":"Yindi Wang, Yu Yun, Jing Zhang, Ling Sun, Zhe Wu, Ruiqi Wang","doi":"10.1007/s10043-025-00987-8","DOIUrl":"https://doi.org/10.1007/s10043-025-00987-8","url":null,"abstract":"<p>In this paper, a 1550 nm subwavelength triangular prism silver nanowire SPPs hybrid waveguide structure with dual coupling modes was proposed. By introducing two mode coupling regions, the waveguide has achieved efficient and strong mode coupling, which endows the hybrid waveguide with the characteristics of a small effective mode area, a long transmission length and good robustness. The effective mode area of the proposed waveguide is less than 0.002, and the transmission length reaches over 300 μm, which has great application value in the design of small optoelectronic devices.</p>","PeriodicalId":722,"journal":{"name":"Optical Review","volume":"31 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144930846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical simulations on self-referential holographic data storage with built-in denoising function by self-referential holographic deep neural network","authors":"Yuta Eto, Rio Tomioka, Taichi Takatsu, Masanori Takabayashi","doi":"10.1007/s10043-025-00978-9","DOIUrl":"https://doi.org/10.1007/s10043-025-00978-9","url":null,"abstract":"<p>Self-referential holography (SRH), a holographic technique that enables the recording, reading, and control of two-dimensional (2D) patterns using a one-beam geometry, can be applied to holographic data storage (HDS) and optoelectronic deep neural network (OE-DNN). Since both applications are implemented using the same optical system, they can be integrated into a single system. We propose a self-referential HDS (SR-HDS) with a built-in denoising function using a self-referential holographic deep neural network (SR-HDNN), where the quality of reconstructed datapages in HDS can be enhanced using deep neural networks (DNNs) without requiring costly electronic computers for implementation. Numerical simulations are performed to demonstrate the feasibility of the proposed method.</p>","PeriodicalId":722,"journal":{"name":"Optical Review","volume":"11 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144930849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An improved Fourier transform profilometry and phase coding for 3D shape measurement","authors":"Yonghua Han, Yanjun Fu, Shiyang Tian, Pengfei Zhang, Baiheng Ma, Zhanjun Yan","doi":"10.1007/s10043-025-00981-0","DOIUrl":"https://doi.org/10.1007/s10043-025-00981-0","url":null,"abstract":"<p>Optical non-contact 3D shape measurement has attracted wide attention from the scientific community. Although by increasing the frequency of projected fringes, the measurement accuracy can be improved, difficulties in phase unwrapping are induced. Reducing the number of projected fringes can also increase the measurement speed. However, there are still certain challenges to meeting the requirements of high speed and high precision without creating additional projection fringe patterns. Along these lines, an improved 3D shape measurement method based on Fourier transform profilometry and phase coding was proposed in this work, where only four projection fringe patterns must be projected. A sinusoidal grating and a uniform gray-level pattern were used to obtain the wrapped phase recovered by the background-normalized Fourier transform algorithm. Two captured phase coding patterns combine with the uniform gray-level pattern to obtain fringe orders solved by the 2 + 1 phase-shifting algorithm. After the fringe order is calculated, the absolute phase map is retrieved and the 3D shape can be obtained. The proposed method is suitable for isolated and complex objects. The performance of the proposed method in reconstructing the 3D shapes of objects was experimentally verified.</p>","PeriodicalId":722,"journal":{"name":"Optical Review","volume":"18 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144930848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Holographic memory formed by three laser sources with different wavelengths for application to optical reconfiguration","authors":"Akifumi Ogiwara, Minoru Watanabe","doi":"10.1007/s10043-025-00979-8","DOIUrl":"https://doi.org/10.1007/s10043-025-00979-8","url":null,"abstract":"<p>An optical setup using three laser sources with different wavelengths was proposed for the formation of a holographic memory consisting of volumetric periodic structures using liquid–crystal composites. Structural analysis of the holographic gratings formed at different wavelengths was performed using polarizing optical microscopy and scanning electron microscopy. The periodic interval between the interference fringes and the volumetric periodic structures decreased with a decrease in the wavelength of the laser used in the fabrication process. The fabricated holographic memory can be used to record and reconstruct circuit information in optically reconfigurable gate arrays (ORGAs) by applying parallel processing techniques based on spatial light wiring. The development of interference exposure optical systems for various laser wavelengths, including blue lasers with short wavelengths, is extremely important for improving the capacity of holographic memory by miniaturizing its internal lattice structure. The fabricated holographic memory demonstrated the ability to accurately record and reconstruct circuit information patterns by switching between different laser wavelengths. Establishing a holographic memory system for ORGAs is essential for developing radiation-resistant devices that can be used in fields requiring high reliability.</p>","PeriodicalId":722,"journal":{"name":"Optical Review","volume":"28 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144930488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}