光:先进制造(英文)最新文献_第6页

Design and realization of 3D printed fiber-tip microcantilever beam probes applied to hydrogen sensing 用于氢气传感的3D打印光纤微悬臂梁探头的设计与实现

光:先进制造(英文) Pub Date : 2022-01-01 DOI: 10.37188/lam.2022.005

C. Liao, Cong Xiong, Jinlai Zhao, Mengqiang Zou, Yuanyuan Zhao, Bozhe Li, P. Ji, Zhihao Cai, Zongsong Gan, Ying Wang, Yiping Wang

引用次数: 16

Hybrid multimode - multicore fibre based holographic endoscope for deep-tissue neurophotonics 基于混合多模多芯光纤的深层神经光子学全息内窥镜

光:先进制造(英文) Pub Date : 2022-01-01 DOI: 10.37188/lam.2022.029

Yang Du, S. Turtaev, I. Leite, A. Lorenz, J. Kobelke, K. Wondraczek, T. Čižmár

{"title":"Hybrid multimode - multicore fibre based holographic endoscope for deep-tissue neurophotonics","authors":"Yang Du, S. Turtaev, I. Leite, A. Lorenz, J. Kobelke, K. Wondraczek, T. Čižmár","doi":"10.37188/lam.2022.029","DOIUrl":"https://doi.org/10.37188/lam.2022.029","url":null,"abstract":"In-vivo microendoscopy in animal models became a groundbreaking technique in neuroscience that rapidly expands our understanding of the brain. Emerging hair-thin endoscopes based on multimode fibres are now opening up the prospect of ultra-minimally invasive neuroimaging of deeply located brain structures. Complementing these advancements with methods of functional imaging and optogenetics, as well as extending its applicability to awake and motile animals constitute the most pressing challenges for this technology. Here we demonstrate a novel fibre design capable of both, high-resolution imaging in immobilised animals and bending-resilient optical addressing of neurons in motile animals. The optimised refractive index profile and the probe structure allowed reaching a spatial resolution of 2 μm across a 230 μm field of view for the initial layout of the fibre. Simultaneously, the fibre exhibits negligible cross-talk between individual inner-cores during fibre deformation. This work provides a technological solution for imaging-assisted spatially selective photo-activation and activity monitoring in awake and freely moving animal models.","PeriodicalId":56519,"journal":{"name":"光:先进制造(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69983530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Holography with high-power CW coherent terahertz source: optical components, imaging, and applications 高功率连续波相干太赫兹源全息术:光学元件、成像和应用

光:先进制造(英文) Pub Date : 2022-01-01 DOI: 10.37188/lam.2022.031

Y. Choporova, B. Knyazev, V. Pavelyev

引用次数: 6

In-process monitoring in laser grooving with line-shaped femtosecond pulses using optical coherence tomography 利用光学相干层析成像技术监测线形飞秒脉冲激光开槽过程

光:先进制造(英文) Pub Date : 2022-01-01 DOI: 10.37188/lam.2022.033

S. Hasegawa, M. Fujimoto, Toshihisa Atsumi, Y. Hayasaki

引用次数: 8

Investigation of human organoid retina with digital holographic transmission matrix measurements 人类器官视网膜的数字全息传输矩阵测量研究

光:先进制造(英文) Pub Date : 2022-01-01 DOI: 10.37188/lam.2022.023

N. Koukourakis, Felix Wagner, Stefan Rothe, M. Karl, J. Czarske

引用次数: 6

Photopatterning via Photofluidization of Azobenzene Polymers 偶氮苯聚合物的光流化光制模

光:先进制造(英文) Pub Date : 2022-01-01 DOI: 10.37188/lam.2022.003

H. Kang, Shu Yang

{"title":"Photopatterning via Photofluidization of Azobenzene Polymers","authors":"H. Kang, Shu Yang","doi":"10.37188/lam.2022.003","DOIUrl":"https://doi.org/10.37188/lam.2022.003","url":null,"abstract":"In current photo-based patterning techniques, an image is projected onto a photosensitive material to generate a pattern in the area where the light is focused. Thus, the size, shape, and periodicity of the pattern are determined by the features on the photomask or projected images, and the materials themselves generally do not play an active role in changing the features. In contrast, azobenzene polymers offer a unique type of photopatterning platform, where photoisomerization of the azobenzene groups can induce substantial material movements at the molecular, micro-, and macroscales. Stable surface relief patterns can be generated by exposure to interference light beams. Thus, periodic nanoand microstructures can be fabricated with both twoand three-dimensional spatial control over a large area in a remarkably simple way. Polarized light can be used to guide the flow of solid azobenzene polymers along the direction of light polarization via an unusual solid-to-liquid transition, allowing for the fabrication of complex structures using light. This review summarizes the recent progress in advanced manufacturing using azobenzene polymers. This includes a brief introduction of the intriguing optical behaviors of azobenzene polymers, followed by discussions of the recent developments and successful applications of azobenzene polymers, especially in microand nanofabrication.","PeriodicalId":56519,"journal":{"name":"光:先进制造(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69983318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Miniaturization of a coherent monocular structured illumination system for future combination with digital holography 用于未来与数字全息相结合的相干单目结构照明系统的小型化

光:先进制造(英文) Pub Date : 2022-01-01 DOI: 10.37188/lam.2022.034

A. Stark, E. Wong, H. Babovsky, Christian Franke, R. Kowarschik

{"title":"Miniaturization of a coherent monocular structured illumination system for future combination with digital holography","authors":"A. Stark, E. Wong, H. Babovsky, Christian Franke, R. Kowarschik","doi":"10.37188/lam.2022.034","DOIUrl":"https://doi.org/10.37188/lam.2022.034","url":null,"abstract":"Miniaturization of a coherent monocular structured system for future combination holography. Abstract Holographic and 3D-measurement processes are an often-used tool in industry, medicine, and scientific applications. While small deviations of objects can be visualized by holographic means with high accuracy, optical systems with active structured illumination are a reliable source of absolute 3D-information in these fields. The combination of digital holography with structured illumination allows to simultaneously measure deformations and absolute 3D coordinates but also requires coherent light and has already been demonstrated in principle with a stereo camera setup. Multi-camera systems are limited to certain setup sizes given by the volume and distance of the detectors. Reducing the system to a one-camera (monocular) setup reduces space and acquisition costs. By using a multi-aperture illumination source an extremely high projection rate could be realized and reduced to a monocular approach with a novel voxel-calibration technique, while the projection system itself still requires a large amount of space. In this paper we present a miniaturized, monocular 3D-measurement system that works with repeatable, coherent speckles, generated by a fiber-coupled laser whose light was distributed by a fiber-switch to a diffuser plate connected with a measurement-head, also including a camera. By addressing different fibers through the switch, varying but repeatable patterns are generated. The size of the device (diameter < 3 cm) is now mainly limited by the volume of the camera. A first 3D-reconstruction of an object and an outlook for a combination of this system with digital holography is given, allowing absolute 3D-coordinates and relative deviations of object points to be measured simultaneously.","PeriodicalId":56519,"journal":{"name":"光:先进制造(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69983600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Holographic optics in planar optical systems for next generation small form factor mixed reality headsets 用于下一代小尺寸混合现实头显的平面光学系统中的全息光学

光:先进制造(英文) Pub Date : 2022-01-01 DOI: 10.37188/lam.2022.042

B. Kress, Maria Pace

{"title":"Holographic optics in planar optical systems for next generation small form factor mixed reality headsets","authors":"B. Kress, Maria Pace","doi":"10.37188/lam.2022.042","DOIUrl":"https://doi.org/10.37188/lam.2022.042","url":null,"abstract":"Helmet Mounted Displays (HMDs), such as in Virtual Reality (VR), Augmented Reality (AR), Mixed reality (MR), and Smart Glasses have the potential to revolutionize the way we live our private and professional lives, as in communicating, working, teaching and learning, shopping and getting entertained. Such HMD devices have to satisfy draconian requirements in weight, size, form factor, power, compute, wireless communication and of course display, imaging and sensing performances. We review in this paper the various optical technologies and architectures that have been developed in the past 10 years to provide adequate solutions for the drastic requirements of consumer HMDs, a market that has yet to become mature in the next years, unlike the existing enterprise and defense markets that have already adopted VR and AR headsets as practical tools to improve greatly effectiveness and productivity. We focus specifically our attention on the optical combiner element, a crucial element in Optical See-Through (OST) HMDs that combines the see-through scene with a world locked digital image. As for the technological platform, we chose optical waveguide combiners, although there is also a considerable effort today dedicated to free-space combiners.","PeriodicalId":56519,"journal":{"name":"光:先进制造(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69983900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Parallax limitations in digital holography: a phase space approach 数字全息术中的视差限制:相位空间方法

光:先进制造(英文) Pub Date : 2022-01-01 DOI: 10.37188/lam.2022.028

U. Schnars, C. Falldorf

引用次数: 1

FEM-based modeling of microsphere-enhanced interferometry 基于有限元法的微球增强干涉测量建模

光:先进制造(英文) Pub Date : 2022-01-01 DOI: 10.37188/lam.2022.049

T. Pahl, Lucie Hüser, Sebastian Hagemeier, P. Lehmann

{"title":"FEM-based modeling of microsphere-enhanced interferometry","authors":"T. Pahl, Lucie Hüser, Sebastian Hagemeier, P. Lehmann","doi":"10.37188/lam.2022.049","DOIUrl":"https://doi.org/10.37188/lam.2022.049","url":null,"abstract":"To improve the lateral resolution in microscopic imaging, microspheres are placed close to the object’ s surface in order to support the imaging process by optical near-field information. Although microsphere-assisted measurements are part of various recent studies, no generally accepted explanation for the effect of microspheres exists. Photonic nanojets, enhancement of the numerical aperture, whispering-gallery modes and evanescent waves are usually named reasons in context with microspheres, though none of these effects is proven to be decisive for the resolution enhancement. We present a simulation model of the complete microscopic imaging process of microsphere-enhanced interference microscopy including a rigorous treatment of the light scattering process at the surface of the specimen. The model consideres objective lenses of high numerical aperture providing 3D conical illumination and imaging. The enhanced resolution and magnification by the microsphere is analyzed with respect to the numerical aperture of the objective lenses. Further, we give a criterion for the achievable resolution and demonstrate that a local enhancement of the numerical aperture is the most likely reason for the resolution enhancement.","PeriodicalId":56519,"journal":{"name":"光:先进制造(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69984049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8