检索结果-南通市图书馆

Optical broadband monitoring of thin film growth

在线全文

学校读者我要写书评

暂无评论

光学精密工程 2005年第4期13卷 403-412页

作者： H. Ehlers T. Groβ M. Lappschies d. ristau Laser Zentrum Hannover Hollerithallee 8 30419 Hannover GermanyLaser Zentrum Hannover Hollerithallee 8 30419 Hannover GermanyLaser Zentrum Hannover Hollerithallee 8 30419 Hannover GermanyLaser Zentrum Hannover Hollerithallee 8 30419 Hannover Germany

This contribution is focused on applications of spectroscopic methods for the precise control of deposition processes. In this context, the present study gives a review on selected combinations of conventional and ion deposition techniques with different broadband online spectrophotometric systems. Besides two systems operating in the VIS- and NIR-spectral range in combination with ion processes, also a monochromator system developed for conventional deposition processes in the dUV/VUV-spectral range will be discussed. The considerations will be concluded by a comparison of the major advantages of the specific combinations of processes with online monitoring concepts and by a brief outlook concerning future challenges.

关键词：宽带光学涂覆技术薄膜分光镜

Advanced control and modeling of deposition processes

在线全文

学校读者我要写书评

暂无评论

Chinese Optics Letters 2013年第13期11卷 30-35页

作者： d.tlev ristau Henrik Ehlers Centre of Quantum Engineering and Space-Time Research Hannover Germany department of Laser Components Laser Zentrum Hannover e.V. Hannover Germany

during the last decade, striking improvements could be achieved for the precise control of deposition processes in optical coating technology. For example, as a consequence of enormous progresses in measure- ment and computer technology, direct optical monitoring in a broad spectral range can be considered as a common tool in many production environments nowadays. Besides the development of the corresponding hardware and measurement channels, advanced approaches for the evaluation of the acquired data and new multiple sensor monitoring strategies moved into the focus of modern research on the way towards de- terministic deposition techniques. In this context, also innovative concepts for the simulation of deposition processes to forecast the result for a specified coating design and automatic online correction algorithms gained of importance to reduce the risk of failure in coating production. The present contribution will be dedicated to selected aspects in this field, especially addressing broad band optical monitoring systems. A short review on examples for existing hardware configurations and software tools will be presented illus- trating the advantages of modern process control techniques. Novel approaches based on the modeling of thin film growth are discussed as an additional strategy to improve the predictability of coating processes.

关键词： 310.1860 deposition and fabrication 310.6845 Thin film devices and applications 280.4788 Optical sensing and sensors

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

激光量热法测量光学薄膜微弱吸收

中国激光 2006年第6期33卷 823-826页

作者：李斌成熊胜明 Holger Blaschke d.tlev ristau 中国科学院光电技术研究所四川成都610041 汉诺威激光中心德国汉诺威30419

按照国际标准ISO 11551研制了用于测量光学薄膜微弱吸收的激光量热装置。典型情况下吸收测量灵敏度优于10-6,测量误差估计为10%左右。在1064 nm波长测量1 mm厚石英玻璃基板的绝对吸收为3.4×10-6,测量灵敏度达到1.5×10-7。测量了不同... 详细信息

按照国际标准ISO 11551研制了用于测量光学薄膜微弱吸收的激光量热装置。典型情况下吸收测量灵敏度优于10-6,测量误差估计为10%左右。在1064 nm波长测量1 mm厚石英玻璃基板的绝对吸收为3.4×10-6,测量灵敏度达到1.5×10-7。测量了不同膜层设计、不同使用角度、不同镀膜技术镀制的全介质高反膜样品;使用离子束溅射(IBS)技术镀制的Ta2O5/SiO2多层0°反射镜的吸收仅为1.08×10-5,而使用离子束辅助沉积(IAd)技术镀制的HfO2/SiO2多层45°反射镜的吸收测量值为6.83×10-5。

关键词：测量技术微弱吸收激光量热法光学薄膜

Spatial separation effects in a guiding procedure in a modified ion-beam-sputtering process

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2015年第1期4卷 109-116页

作者： Sina Malobabic Marco Jupé d.tlev ristau Laser Zentrum Hannover e.V. Hollerithallee 8D-30419 HannoverGermany QUEST:Centre for Quantum Engineering and Space-Time Research Leibniz Universität HannoverHannoverGermany

In the present state of the art,ion beam sputtering is used to produce low-loss dielectric *** the manufacturing of a dielectric layer stack,the deposition material must be changed,which requires rapid mechanical movement of vacuum *** mechanical components can be regarded as a risk factor for contamination during the coating process,which limits the quality of high-end laser *** minimize the particle contamination,we present a novel deposition concept that does not require movable components to change the coating material during the coating process.A magnetic field guiding technique has been developed,which enables the tuning of the refractive index in the layer structure by sputtering mixtures with varying compositions of two materials using a single-ion *** versatility of this new concept is demonstrated for a highreflection mirror.

关键词： EM field separation ion beam sputtering plasma guiding

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

大功率激光器的光学镀膜问题

光机情报 1990年第10期7卷 26-32页

作者： ristau,d 大舟

COMPARING EURO-NORMS TO MILITARY STANdARdS

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

COMPARING EURO-NORMS TO MILITARY STANDARDS

Waterproof coatings for high-power laser cavities

1997 International Symposium on Electromagnetic Compatibility

作者： diethard Hansen detlef ristau EURO EMC SERVICE（EES） dr.Hansen GmbH Potsdamer Str.18A D-14513 TeltowGermany

＜正＞A comparison of commercial euro-standards and international military standards is made with respect to dual purpose equipment and CE certification under the European EMC directive 89/336/EEC. *** Europe has implemented equal legal and normative conditions for trade（import,export） throughout the European Union,which

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Light(Science & Applications) 2019年第1期8卷 1063-1068页

作者： Xinbin Cheng Siyu dong Song Zhi Sebastian Paschel Istvan Balasa d.tlev ristau Zhanshan Wang MOE Key Laboratory of Advanced Micro-Structured Materials Shanghai 200092China Institute of Precision Optical Engineering School of Physics Science and EngineeringTongji UniversityShanghai 200092China IFSA Collaborative Innovation Center Shanghai Jiao Tong UniversityShanghai 200240China Laser Zentrum Hannover e.V. Laser Components DepartmentHannover 30419Germany

With the ever-increasing laser power and repetition rate,thermal control of laser media is becoming increasingly *** for widely used air cooling or a bonded heat sink,water cooling of a laser medium is more effective in removing waste ***,how to protect deliquescent laser media from water erosion is a challenging ***,novel waterproof coatings were proposed to shield Nd:Glass from water *** clarifying the dependence of the waterproof property of single layers on their microstructures and pore characteristics,nanocomposites that dope SiO_(2) in HfO_(2) were synthesized using an ion-assisted co-evaporation process to solve the issue of a lack of a highindex material that simultaneously has a dense amorphous microstructure and wide ***_(0.7)Si_(0.3)O_(2)/SiO_(2) multifunctional coatings were finally shown to possess an excellent waterproof property,high laser-induced damage threshold(LIdT)and good spectral performance,which can be used as the enabling components for thermal control in high-power laser cavities.

关键词： power high property

激光薄膜特性参数测试方法标准化进展(特邀)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

光子学报 2022年第9期51卷 32-41页

作者：李斌成王静 ristau d.tlev 电子科技大学光电科学与工程学院成都610054 汉诺威莱布尼兹大学量子光学研究所德国汉诺威30167

综述了近年来激光薄膜元件反射率/透过率、吸收损耗、散射损耗和激光损伤阈值等主要性能参数测试方法的标准化进展。重点分析了分光光度法、激光比率法和光腔衰荡法三种标准的反射率/透过率测试方法的优缺点,指出了分光光度法和光腔衰... 详细信息

综述了近年来激光薄膜元件反射率/透过率、吸收损耗、散射损耗和激光损伤阈值等主要性能参数测试方法的标准化进展。重点分析了分光光度法、激光比率法和光腔衰荡法三种标准的反射率/透过率测试方法的优缺点,指出了分光光度法和光腔衰荡法的适用范围。分析了激光量热法测量薄膜元件吸收损耗的优点和不足,介绍了正在制定中的光热吸收测量国际标准的主要内容和进展情况,明确激光量热法主要适用于实验室薄膜元件吸收损耗绝对值的确定,而光热法更适用于大口径元件吸收损耗的确定和吸收型缺陷分布的成像测量。介绍了激光损伤阈值测试方法目前正在修订版本的主要技术内容和区别,修订后的激光损伤阈值测试方法国际标准将考虑客户的测试要求,测试结果可更满足工程应用需求。最后介绍了中国主持国际标准制定修订情况及国际标准在中国的转化情况。

关键词：标准化测试方法激光损伤阈值反射率/透过率吸收损耗散射损耗

Formation of Platinum (Pt) Nanocluster Coatings on K-OMS-2 Manganese Oxide Membranes by Reactive Spray deposition Technique (RSdT) for Extended Stability during CO Oxidation

在线全文

学校读者我要写书评

暂无评论

Advances in Chemical Engineering and Science 2014年第1期4卷 23-35页

作者： Hector F. Garces Justin Roller Cecil K. King’ondu Saminda dharmarathna Roger A. ristau Rishabh Jain Radenka Maric Steven L. Suib department of Chemistry University of Connecticut Storrs USA department of Chemistry University of Connecticut Storrs USA Institute of Materials Science University of Connecticut Storrs USA department of Materials Science & Engineering University of Connecticut Storrs USA Center for Clean Energy Engineering University of Connecticut Storrs USA department of Materials Science & Engineering University of Connecticut Storrs USA Center for Clean Energy Engineering University of Connecticut Storrs USA Chemical and Biomolecular Engineering department University of Connecticut Storrs US department of Sustainable Energy Science and Engineering Nelson Mandela African Institution of Science and Technology Arusha Tanzania Institute of Materials Science University of Connecticut Storrs USA School of Engineering Brown University Providence USA

Nanocluster formation of a metallic platinum (Pt) coating, on manganese oxide inorganic membranes impregnated with multiwall carbon nanotubes (K-OMS-2/MWCNTs), applied by reactive spray deposition technology (RSdT) is discussed. RSdT applies thin films of Pt nanoclusters on the substrate;the thickness of the film can be easily controlled. The K-OMS-2/MWCNTs fibers were enclosed by the thin film of Pt. X-ray diffraction (XRd), scanning electron microscopy/X-ray energy dispersive spectroscopy (SEM/XEdS), focus ion beam/scanning electron microscopy (FIB/SEM), transmission electron microscopy (TEM), and X-ray 3d micro-tomography (MicroXCT) which have been used to characterize the resultant Pt/K-OMS-2/MWCNTs membrane. The non-destructive characterization technique (MicroXCT) resolves the Pt layer on the upper layer of the composite membrane and also shows that the membrane is composed of sheets superimposed into stacks. The nanostructured coating on the composite membrane material has been evaluated for carbon monoxide (CO) oxidation. The functionalized Pt/K-OMS-2/MWCNTs membranes show excellent conversion (100%) of CO to CO2 at a lower temperature 200℃ compared to the uncoated K-OMS-2/MWCNTs. Moreover, the Pt/K-OMS-2/MWCNTs membranes show outstanding stability, of more than 4 days, for CO oxidation at 200℃.

关键词： Manganese Oxide Membrane Pt Nanostructures Reactive Spray deposition Technology (RSdT) Film deposition X-Ray Tomography