检索结果-内蒙古大学图书馆

conference on advances in optical data storage technology

作者： Tsuda, S Hirota, Y Uzawa, E Kaneko, R Ferrotec Corp Chiba 2892131 Japan

ISBN: (纸本)0819455989

Rotational speed of optical drives and servo speed of optical pick-up actuators should be higher to meet high performance for optical drives. One of the methods to achieve such a high performance product is to increase an input power for the coil, but a heat problem generated by the coil will become serious. Two kinds of new ferrofluids have been designed to transfer a heat from the coil of optical pick-up actuator. Their physical properties have been properly designed to be functioned at a wide operating temp. and various aspects of their reliability including resistance for deterioration to high temp. and humidity, etc., have been evaluated. Also, they have been applied to optical pick-up actuators and the properties of ferrofluids such as heat transfer and shock resistance have been examined. The life tests showed that the new ferrofluids had at least two times longer life and a smaller viscosity change than CF-3A, which has been used in commercially available optical pick-up actuators. The new ferrofluids could tolerate the shock of 500 G without a ferrofluid splash, the coil temp. with the ferrofluid was about 10 degrees C or more lower than the one without it at the same input power.

关键词： ferrofluid heat transfer damping optical pick-up actuator servo speed

来源：评论

学校读者我要写书评

暂无评论

A brief history of high-power semiconductor lasers

引用

IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS 2000年第6期6卷 1470-1477页

作者： Welch, DF SDL Inc San Jose CA 95134 USA

The following is a historical perspective of the significant technological demonstrations that shaped the history of high power semiconductor lasers, This article is not meant to be a re view article, as there are much better review articles and reviewers available, nor would the article try to cover all of the contributions to such a rich technology. Nonetheless, this article will, anecdotally, present a perspective on the technological advances that resulted in the enabling technology of high power semiconductor lasers for applications such as fiber optic communications, data storage, and material processing.

关键词： optical communications semiconductor lasers

来源：评论

学校读者我要写书评

暂无评论

Recent advances in near-field-based small form factor optical storage

引用

IEEE TRANSACTIONS ON MAGNETICS 2007年第2期43卷 768-772页

作者： Davies, David H. Bell, Bernard W., Jr. Wilson, Scott D. Blankenbeckler, David L. DPHI Dataplay Inc Boulder CO 80304 USA

A review of small form factor optical storage (media diameters less than 50 mm) is presented with emphasis on the development of near-field technology. The current efforts are summarized together with the commercially desired attributes. The results of the examination of gallium phosphide (GaP) and diamond solid immersion lenses in conjunction with evanescent coupling are presented. A polarization-based gap error signal (GES) technique for air-gap servocontrol is described. Results indicate that the method is relatively insensitive to contamination on the surface and can resolve 100-nm surface features. A 50-GB 120-mm read-only memory (ROM) disc was successfully read and the results indicate that a 10-GB 32-mm diameter RW/ROM optical disc based on 650-nm lasers should be feasible.

关键词： diamond evanescent coupling gallium phosphide (GaP) optical storage solid immersion lenses

来源：评论

学校读者我要写书评

暂无评论

Developing characteristics of Thermally Fixed holograms in Fe:LiNbO₃

Developing characteristics of Thermally Fixed holograms in F...

引用

conference on advances in optical data storage technology

作者： Yang, R Jiang, ZQ Liu, GQ Tao, SQ Beijing Univ Technol Coll Appl Sci Beijing 10002 Peoples R China

ISBN: (纸本)0819455989

Thermal-fixing holographic storage in photorefractive crystals is an effective nonvolatile storage technique for stabilizing holograms against the optical erasure. The developing characteristics of fixed holograms in iron-doped lithium niobate dominate their final diffraction efficiencies after developing, provided that the ionic compensation in the fixing stage is nearly complete. Developing kinetics of fixed holograms under homogeneous illumination is studied. The effect of developing light intensity on developing efficiency has been demonstrated experimentally. The fixed holograms with the same initial recording grating strength are developed under illumination of the different light intensities, such as 200mW/cm(2), 400mW/cm(2), 600mW/cm(2). and 800mW/cm(2), respectively. The fixed holograms with the different initial recording grating strengths are developed under illumination of the same light intensities as well. The overdeveloping characteristics of fixed holograms are described. The developing efficiency of the hologram with a given initial recording grating strength is found to depend on the intensity of developing light. These features can be explained with the joint effect of the resulting space-charge holographic field of the fixed hologram and the photovoltaic field under homogeneous illumination.

关键词： volume holographic storage developing diffraction efficiency thermal fixing efficiency developing efficiency

来源：评论

学校读者我要写书评

暂无评论

Finite-Element Shock Analysis of Slim optical Disk Drives

引用

IEEE TRANSACTIONS ON MAGNETICS 2009年第5期45卷 2213-2216页

作者： Lim, Seungho Kim, Kyungtae Choi, Chanho Park, No-Cheol Park, Young-Pil Park, Kyoung-Su Cha, Ik-Joo Yonsei Univ Dept Mech Engn Seoul 120749 South Korea Hitachi LG Data Storage Inc Pyeongtaek Si 451713 Gyeonggi Do South Korea

In this paper, a finite-element model of a slim optical disk drive is developed to investigate the transient response of the sled base and disk. The model is simplified by using beam, shell and lumped parameter elements, in order to decrease the computational time. After the dynamic characteristics of the finite-element model have been verified by modal test, the shock response is obtained and compared with the results of a drop test. Finally, dynamic characteristics are modified to improve the shock performance.

关键词： Finite-element method linear drop test shock analysis slim optical disk drive

来源：评论

学校读者我要写书评

暂无评论

Further advances in electron beam recording

Further advances in electron beam recording

引用

conference on optical data storage (ODS2000)

作者： Reynolds, G Cartwright, G Nimbus Technol & Engn Ltd Wyastone Leys NP25 3SR Monmouth England

The development of a production Electron Beam Recorder designed for making masters for optical discs of up to 100 gigabytes capacity is discussed. A second-generation electron beam column for this machine will also be... 详细信息

ISBN: (纸本)0819437336

关键词： electron E beam recorder mastering HDDVD HDD

来源：评论

学校读者我要写书评

暂无评论

Two-dimensional silicon-on-glass actuator combined with a dispensed polymer microlens

引用

MICRO & NANO LETTERS 2013年第10期8卷 606-608页

作者： Li, Pei Pan, Longfa Zappe, Hans Tsinghua Univ Dept Precis Instruments & Mechanol Beijing 100084 Peoples R China Univ Freiburg Dept Microsyst Engn IMTEK D-79106 Freiburg Germany

Actuators for objective lens positioning are indispensable components for writing and reading data to and from optical storage media. Significant advances in the technical capabilities of microlens actuators for optical heads have been achieved using MEMS technology, enabling miniaturisation and integration of optical data storage systems. In this reported work, a compact silicon-on-glass (SOG) actuator for two-dimensional (2D) positioning of a dispensed polymer microlens is developed by MEMS technology. A wafer-level process for fabrication of the SOG actuator is achieved using anodic bonding, in which a Pyrex wafer was bonded with an ultra-thin silicon wafer. Dispensed polymer microlenses are fabricated and subsequently integrated onto the 2D actuator by an automatic handling system. Typical displacements of about +/- 28.6 mu m in the tracking direction and 3.2 mu m in the focusing direction are experimentally characterised. The compact 2D SOG actuator and assembly technology may be particularly useful for expanding the application area for the optical head.

关键词： actuators bonding processes glass microactuators microlenses optical storage silicon two-dimensional silicon-on-glass actuator objective lens positioning writing data reading data optical storage media technical capability microlens actuators optical heads MEMS technology optical data storage systems compact silicon-on-glass actuator two-dimensional positioning wafer-level process anodic bonding pyrex wafer ultra-thin silicon wafer dispensed polymer microlenses 2D actuator automatic handling system typical displacements 2D SOG actuator assembly technology

来源：评论

学校读者我要写书评

暂无评论

optical storage: technology and applications

Optical storage: Technology and applications

引用

Proceedings of the 1994 13th Symposium on Mass storage Systems

作者： Lenth, Wilfried IBM Almaden Research Cent San Jose United States

optical storage technology is characterized by the combination of high storage density, high data rate, fast access time, high reliability and media removability. The paper discusses innovations in component technologies that are leading to rapid advances in the optical storage technology. The appearance of improved storage management software will continue to extend the application potential of optical disk libraries beyond the more traditional backup and archival functions.

关键词： optical data storage

来源：评论

学校读者我要写书评

暂无评论

Performance Evaluation of Iterative Channel Codes for Digital data storage on Microfilm

Performance Evaluation of Iterative Channel Codes for Digita...

引用

IEEE Global Telecommunications conference (GLOBECOM 2010)

作者： Pflug, Florian Voges, Christoph Fingscheidt, Tim Tech Univ Carolo Wilhelmina Braunschweig Inst Commun Technol D-38106 Braunschweig Germany

ISBN: (纸本)9781424456383

In the past few years microfilm has gained new research interest as a medium for long-term storage of digital data. This became particularly possible by recent advances in laser film recording technology. In contrast to other optical or magnetic storage media, the microfilm digital channel (MDC) still has been subject to characterization in only a few publications. In this paper we investigate iterative channel codes for the MDC, in particular low-density parity-check and turbo convolutional codes. Simulation results show that practically error-free storage can be achieved with code rates even above 0.85 on a monochrome MDC with binary amplitude-shift keying modulation.

关键词： amplitude shift keying binary amplitude-shift keying modulation binary codes convolutional codes digital data storage iterative channel codes iterative decoding laser film recording low density parity check code magnetic storage magnetic storage media mic

来源：评论

学校读者我要写书评

暂无评论

optical COMPUTING, optical MEMORY, AND SBIRS AT FOSTER-MILLER 5

OPTICAL COMPUTING, OPTICAL MEMORY, AND SBIRS AT FOSTER-MILLE...

引用

5th conference on optical Pattern Recognition

作者： DOMASH, LH FOSTER MILLER INC WALTHAMMA 02154

ISBN: (纸本)0819415413

A desktop design and manufacturing system for binary diffractive elements, MacBEEP, was developed with the optical researcher in mind. optical processing systems for specialized tasks such as cellular automation computation and fractal measurement were constructed. A new family of switchable holograms has enabled several applications for control of laser beams in optical memories. New spatial light modulators and optical logic elements have been demonstrated based on a more manufacturable semiconductor technology. Novel synthetic and polymeric nonlinear materials for optical storage are under development in an integrated memory architecture. SBIR programs enable creative contributions from smaller companies, both product oriented and technology oriented, and support advances that might not otherwise be developed.

关键词： Optics manufacturing optical storage Fractal analysis Holograms Polymers Binary data Holography optical signal processing Computer aided design optical computing

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：