光:先进制造(英文)最新文献_第7页

Melt pool monitoring in laser beam melting with two-wavelength holographic imaging 激光熔化熔池的双波长全息成像监测

光:先进制造(英文) Pub Date : 2022-01-01 DOI: 10.37188/lam.2022.011

Matthieu Piniard, B. Sorrente, Gilles Hug, P. Picart

引用次数: 6

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

High-speed, large-area and high-precision fabrication of aspheric micro-lens array based on 12-bit direct laser writing lithography 基于12位激光直写光刻的高速、大面积、高精度非球面微透镜阵列制造

光:先进制造(英文) Pub Date : 2022-01-01 DOI: 10.37188/lam.2022.047

Shiyi Luan, Fei Peng, Guoxing Zheng, Chengqun Gui, Yi Song, and Sheng Liu

引用次数: 2

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

55 Years of Holographic Non-Destructive Testing and Experimental Stress Analysis: Is there still Progress to be expected? 全息无损检测和实验应力分析55年:还有进展可期待吗?

光:先进制造(英文) Pub Date : 2022-01-01 DOI: 10.37188/lam.2022.008

W. Osten, G. Pedrini

引用次数: 6

Advanced Optical Methods and Materials for Fabricating 3D Tissue Scaffolds 制造3D组织支架的先进光学方法和材料

光:先进制造(英文) Pub Date : 2022-01-01 DOI: 10.37188/lam.2022.026

Xiaobo Li, Wanping Lu, Xiayi Xu, Yintao Wang, Shih-Chih Chen

{"title":"Advanced Optical Methods and Materials for Fabricating 3D Tissue Scaffolds","authors":"Xiaobo Li, Wanping Lu, Xiayi Xu, Yintao Wang, Shih-Chih Chen","doi":"10.37188/lam.2022.026","DOIUrl":"https://doi.org/10.37188/lam.2022.026","url":null,"abstract":"Three-dimensional (3D) printing, also known as additive manufacturing (AM), has undergone a phase of rapid development in the fabrication of customizable and high-precision parts. Thanks to the advancements in 3D printing technologies, it is now a reality to print cells, growth factors, and various biocompatible materials altogether into arbitrarily complex 3D scaffolds with high degree of structural and functional similarities to the native tissue environment. Additionally, with overpowering advantages in molding efficiency, resolution, and a wide selection of applicable materials, optical 3D printing methods have undoubtedly become the most suitable approach for scaffold fabrication in tissue engineering (TE). In this paper, we first provide a comprehensive and up-to-date review of current optical 3D printing methods for scaffold fabrication, including traditional extrusion-based processes, selective laser sintering, stereolithography, and two-photon polymerization etc. Specifically, we review the optical design, materials, and representative applications, followed by fabrication performance comparison. Important metrics include fabrication precision, rate, materials, and application scenarios. Finally, we summarize and compare the advantages and disadvantages of each technique to guide readers in the optics and TE communities to select the most fitting printing approach under different application scenarios.","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":"69983425","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: 1

Mid-infrared all-optical modulators based on an acetylene-filled hollow-core fiber 基于乙炔填充空心芯光纤的中红外全光调制器

光:先进制造(英文) Pub Date : 2022-01-01 DOI: 10.37188/lam.2022.050

Kaiyuan Zheng, Shoulin Jiang, Feifan Chen, Yan Zhao, Shou-fei Gao, Ying‐ying Wang, H. Ho, W. Jin

引用次数: 3

Holography in the invisible. From the thermal infrared to the terahertz waves: outstanding applications and fundamental limits 不可见的全息术。从热红外到太赫兹波:杰出的应用和基本限制

光:先进制造(英文) Pub Date : 2022-01-01 DOI: 10.37188/lam.2022.022

M. Georges, Yuchen Zhao, J. Vandenrijt

{"title":"Holography in the invisible. From the thermal infrared to the terahertz waves: outstanding applications and fundamental limits","authors":"M. Georges, Yuchen Zhao, J. Vandenrijt","doi":"10.37188/lam.2022.022","DOIUrl":"https://doi.org/10.37188/lam.2022.022","url":null,"abstract":"Since its invention, holography has been mostly applied at visible wavelengths in a variety of applications. Specifically, non-destructive testing of manufactured objects was a driver for developing holographic methods and all related ones based on the speckle pattern recording. One substantial limitation of holographic non-destructive testing is the setup stability requirements directly related to the laser wavelength. This observation has driven some works for 15 years: developing holography at wavelengths much longer than visible ones. In this paper, we will first review researches carried out in the infrared, mostly digital holography at thermal infrared wavelengths around 10 micrometers. We will discuss the advantages of using such wavelengths and show different examples of applications. In nondestructive testing, large wavelengths allow using digital holography in perturbed environments on large objects and measure large deformations, typical of the aerospace domain. Other astonishing applications such as reconstructing scenes through smoke and flames were proposed. When moving further in the spectrum, digital holography with so-called Terahertz waves (up to 3 millimeters wavelength) has also been studied. The main advantage here is that these waves easily penetrate some materials. Therefore, one can envisage Terahertz digital holography to reconstruct the amplitude and phase of visually opaque objects. We review some cases in which Terahertz digital holography has shown potential in biomedical and industrial applications. We will also address some fundamental bottlenecks that prevent fully benefiting from the advantages of digital holography when increasing the wavelength.","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":"69983314","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: 3

Holographic augmented reality display with conical holographic optical element for wide viewing zone 采用锥形全息光学元件的全息增强现实显示器，可实现宽视场

光:先进制造(英文) Pub Date : 2022-01-01 DOI: 10.37188/lam.2022.012

Y. Sando, Kazuo Satoh, D. Barada, T. Yatagai

引用次数: 7

Holographic 3D Imaging through Random Media: Methodologies and Challenges 全息三维成像通过随机媒体:方法和挑战

光:先进制造(英文) Pub Date : 2022-01-01 DOI: 10.37188/lam.2022.014

Mitsuo Takeda, W. Osten, E. Watanabe

引用次数: 2