Optical Review最新文献_第4页

Truncated cylindrical array plate for mid-air imaging 半空成像用截形圆柱阵列板

IF 1.2 4区物理与天体物理

Optical Review Pub Date : 2025-02-05 DOI: 10.1007/s10043-025-00948-1

Junpei Sano, Naoya Koizumi

{"title":"Truncated cylindrical array plate for mid-air imaging","authors":"Junpei Sano, Naoya Koizumi","doi":"10.1007/s10043-025-00948-1","DOIUrl":"https://doi.org/10.1007/s10043-025-00948-1","url":null,"abstract":"Mid-air imaging, a visual display technology for augmented reality (AR) that enables multiple people to view images simultaneously without the need for special eyewear, involves the formation of real images in mid-air through various optical elements. This paper presents a novel mid-air imaging optical plate, termed the truncated cylindrical array plate (TCAP). TCAP is composed of transparent cylinders with obliquely truncated ends and mirrors, specifically designed to address issues such as stray light and limited viewing angles in existing mid-air imaging optical elements. We evaluated TCAP through computer simulations and by fabricating a prototype optical element. Ray tracing simulations and stereo matching algorithms demonstrated that mid-air images are symmetrically formed on the side opposite of the light source relative to the TCAP. Furthermore, the simulations indicated that a bright, stray-light-free mid-air image could be achieved within a horizontal viewing angle of approximately (pm , 40 ^circ ). Experimental evaluation using a handcrafted prototype further confirmed the plane symmetry of mid-air image formation, validating its functionality as a mid-air imaging element. The proposed method is advantageous in systems where stray light is problematic, such as mid-air image interaction systems or optical systems utilizing mid-air imaging elements.","PeriodicalId":722,"journal":{"name":"Optical Review","volume":"9 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143192364","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}

引用次数: 0

BaTiO3/Si-hybrid slot-waveguide electro-optic modulator BaTiO3/ si混合缝隙波导电光调制器

IF 1.2 4区物理与天体物理

Optical Review Pub Date : 2025-02-04 DOI: 10.1007/s10043-025-00950-7

Thomas M. Mercier, Isao Tomita, Martin D. B. Charlton

引用次数: 0

Achieving higher spatial resolution in complex amplitude modulation using a pixel shift-based dual-phase modulation method 利用基于像素偏移的双相位调制方法实现复杂调幅中更高的空间分辨率

IF 1.2 4区物理与天体物理

Optical Review Pub Date : 2025-02-03 DOI: 10.1007/s10043-025-00949-0

Jianglian Wang, Atsushi Okamoto, Yuta Goto, Akihisa Tomita

{"title":"Achieving higher spatial resolution in complex amplitude modulation using a pixel shift-based dual-phase modulation method","authors":"Jianglian Wang, Atsushi Okamoto, Yuta Goto, Akihisa Tomita","doi":"10.1007/s10043-025-00949-0","DOIUrl":"https://doi.org/10.1007/s10043-025-00949-0","url":null,"abstract":"This paper proposes a novel pixel shift-based dual-phase modulation method (PS-DPMM) designed to enhance the spatial resolution of complex amplitude modulations. Conventional techniques, including off-axis computer-generated holograms (CGH), double-phase holograms (DPH), and kinoforms, often encounter issues like low diffraction efficiency, limited spatial resolution, and high speckle noise. Although the dual-phase modulation method (DPMM), which employs two spatial light modulators (SLMs), achieves high diffraction efficiency, its spatial resolution is constrained by the intrinsic pixel size and resolution of the SLM. To overcome this limitation, we propose the PS-DPMM, an extension of the DPMM that introduces a 1/2-pixel shift between two SLMs. Although this sacrifices a portion of the modulation performance, it effectively improves the spatial resolution of complex amplitude modulation by nearly doubling. Through numerical simulations and experimental validation, we demonstrate that the PS-DPMM attains almost twice the spatial resolution of conventional methods while maintaining a relatively high-quality modulation. This approach provides a promising solution for advancing high-spatial-resolution SLM-based complex amplitude modulation with potential applications in holographic displays, fiber-optic systems, and other fields requiring high spatial resolution wavefront control.","PeriodicalId":722,"journal":{"name":"Optical Review","volume":"25 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143077580","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}

引用次数: 0

Numerical simulations of optimized MSD multiplication on ternary optical computer 优化的MSD乘法在三元光学计算机上的数值模拟

IF 1.2 4区物理与天体物理

Optical Review Pub Date : 2025-01-27 DOI: 10.1007/s10043-025-00947-2

Mei Li, Shu Chun Qu

引用次数: 0

Super-resolution human-silhouette imaging by joint optimization of coded illumination and reconstruction network: a simulation study 编码照明与重构网络联合优化的超分辨率人体轮廓成像仿真研究

IF 1.2 4区物理与天体物理

Optical Review Pub Date : 2025-01-24 DOI: 10.1007/s10043-025-00946-3

Shunsuke Sakoda, Tomoya Nakamura, Yasushi Yagi

引用次数: 0

A terahertz polarization filter based on non-uniform thickness dielectric twin-tube 基于非均匀厚度介电双管的太赫兹偏振滤波器

IF 1.2 4区物理与天体物理

Optical Review Pub Date : 2025-01-13 DOI: 10.1007/s10043-025-00943-6

Peng Zhang, Chun-Kai Chen, Chun-Fang Rao, Xing-Fang Luo, Wen-Jie Zhang, Hua Wang, Yuan-Feng Zhu

{"title":"A terahertz polarization filter based on non-uniform thickness dielectric twin-tube","authors":"Peng Zhang, Chun-Kai Chen, Chun-Fang Rao, Xing-Fang Luo, Wen-Jie Zhang, Hua Wang, Yuan-Feng Zhu","doi":"10.1007/s10043-025-00943-6","DOIUrl":"https://doi.org/10.1007/s10043-025-00943-6","url":null,"abstract":"A simple-structured total internal reflection terahertz filter based on a microstructured optical fiber is proposed in this paper, consisting of two non-uniform thickness dielectric tubes symmetrically nested within an outer cladding. The investigation uses the finite element method and the simulation results show that the x-polarized fundamental mode (XPFM) is well confined within the fiber core, while the lowest-loss higher-order mode (LL-HOM) exhibits significant loss, and y-polarized fundamental mode (YPFM) exhibits even greater loss. Specifically, the loss difference between the XPFM and the LL-HOM is 15.39 dB/cm at 1 THz. After a 2 cm transmission length, the LL-HOM achieves an extinction ratio of 30 dB, while the insertion loss of the XPFM is only 0.67 dB. Furthermore, when the length of the filter is fixed at 4.1 cm, stable single-mode transmission of the XPFM is maintained over the frequency range from 0.755 THz to 1.075 THz, with the insertion loss of the XPFM remaining below 1.5 dB. The proposed filter demonstrates excellent fabrication tolerance and holds significant potential for applications in terahertz systems.","PeriodicalId":722,"journal":{"name":"Optical Review","volume":"47 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142975032","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}

引用次数: 0

Generation of switchable multi-wavelength solitons in a fiber laser mode locked by MoS2-wrapped microfiber 二硫化钼包覆微光纤锁模光纤激光中可切换多波长孤子的产生

IF 1.2 4区物理与天体物理

Optical Review Pub Date : 2025-01-08 DOI: 10.1007/s10043-024-00942-z

Guangyuan Duan, Wenlei Li, Ruping Lin, Feifei Lu, Gaoli Geng, Yao Zhao, Xinliang Wang, Jian Xu

引用次数: 0

Underwater image enhancement via adaptive white-balancing and multi-restoration image fusion 基于自适应白平衡和多重恢复图像融合的水下图像增强

IF 1.2 4区物理与天体物理

Optical Review Pub Date : 2024-12-28 DOI: 10.1007/s10043-024-00941-0

Genping Zhao, Yuanhao Xiao, Canheng Huang, Zhuowei Wang, Heng Wu

{"title":"Underwater image enhancement via adaptive white-balancing and multi-restoration image fusion","authors":"Genping Zhao, Yuanhao Xiao, Canheng Huang, Zhuowei Wang, Heng Wu","doi":"10.1007/s10043-024-00941-0","DOIUrl":"https://doi.org/10.1007/s10043-024-00941-0","url":null,"abstract":"Underwater images often suffer from color shift and visual blur due to light absorption and scattering in the water medium. An adaptive image enhancement method is proposed for underwater image quality improvement. First, adaptive color compensation is proposed based on the color features of the image, and selectively apply the gray world assumption according to the degree of color unevenness. Second, we use the color correction result combined with a rough estimation of ambient light and medium transmission map to restore the brightness and contrast of the underwater image. Next, based on different ambient light estimation values, we obtain multiple restoration results with different local features. Finally, we introduce the well-known multi-scale fusion strategy, using gradient matrix as weight, to fuse multiple restoration results. Extensive experiments on natural and synthetic underwater image datasets show that our method is robust in underwater image enhancement to achieve color, high contrast, moderate brightness in various complex underwater environments. Moreover, its effectiveness is also verified in the applications of underwater image saliency detection and natural image enhancement.","PeriodicalId":722,"journal":{"name":"Optical Review","volume":"2 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142888365","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}

引用次数: 0

Monitoring of size and dynamics of thrombus in artificial blood flow using laser speckle image analysis 用激光散斑图像分析监测人工血流中血栓的大小和动态

IF 1.2 4区物理与天体物理

Optical Review Pub Date : 2024-12-27 DOI: 10.1007/s10043-024-00938-9

Naomichi Yokoi, Yoshihisa Aizu

{"title":"Monitoring of size and dynamics of thrombus in artificial blood flow using laser speckle image analysis","authors":"Naomichi Yokoi, Yoshihisa Aizu","doi":"10.1007/s10043-024-00938-9","DOIUrl":"https://doi.org/10.1007/s10043-024-00938-9","url":null,"abstract":"The formation of thrombus in blood may be a cause of thrombosis which induces symptoms, such as myocardial infarction, cerebral infarction, and economy class syndrome. Recently, investigations on blood flows inside artificial blood vessel and artificial organ have been performed energetically for clinical application. Thus, in vitro monitoring of thrombogenesis in blood flow inside them is thought to be essential to optimize their function for stable blood perfusion in such as artificial dialysis system and blood transfusion system. In the present study, we propose a method for monitoring the size and dynamics of thrombus in artificial blood flow using speckle patterns obtained under the illumination of coherent light. We experimentally discuss the spatial and temporal variation information on speckle patterns in relation to the size and dynamics of thrombus, respectively, under illumination of a laser diode. The above information contributes to the quantification of degree of thrombogenesis. Experimental results show the feasibility of the present method for in vitro monitoring of the formation of thrombus in artificial blood flow.","PeriodicalId":722,"journal":{"name":"Optical Review","volume":"5 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142888366","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}

引用次数: 0

Simulation on temperature rise using ring-resonator-type device for heat-assisted magnetic recording 使用环形谐振器型器件进行热辅助磁记录的温升模拟

IF 1.2 4区物理与天体物理

Optical Review Pub Date : 2024-12-16 DOI: 10.1007/s10043-024-00939-8

Ryuichi Katayama, Satoshi Sugiura

{"title":"Simulation on temperature rise using ring-resonator-type device for heat-assisted magnetic recording","authors":"Ryuichi Katayama, Satoshi Sugiura","doi":"10.1007/s10043-024-00939-8","DOIUrl":"https://doi.org/10.1007/s10043-024-00939-8","url":null,"abstract":"Heat-assisted magnetic recording (HAMR) is a promising technology for improving the recording density of hard disk drives. A near-field transducer (NFT), which forms a small light spot on a recording medium, is necessary in HAMR. The authors’ group previously proposed a novel device, in which a metal nano-antenna acting as an NFT is attached to a semiconductor ring resonator acting as a light source via a dielectric spacer. In this study, the temperature rise including the recording medium using this device was analyzed through the combination of optical and thermal simulations. To reduce the temperature rise of the nano-antenna while heating the recording layer to the Curie temperature, the following two methods were used: first, the nano-antenna length and the spacer thickness were optimized. Second, a heat spreader, which surrounds the nano-antenna, was introduced. The nano-antenna was made of Au, and the spacer and heat spreader were made of SiO2. When the peak temperature of the recording layer was 800 K, the temperature of the nano-antenna was 3350 K without the above methods, but it was significantly reduced to 400 K with the above methods. This is a sufficiently low value to keep the hardness of the nano-antenna. On the other hand, the thermal spot size in the recording layer was slightly increased from 62 × 64 nm2 to 67 × 72 nm2 by the above methods.","PeriodicalId":722,"journal":{"name":"Optical Review","volume":"82 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142825595","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}

引用次数: 0