光盘中使用的光学薄膜

介绍了用于ＣＤ系列光盘,磁光光盘,相变光盘和ＤＶＤ系列光盘的信息记录膜,光学介质膜和反射膜材料的原理,性能要求,制膜技术以及膜层之间的匹配的问题。     

基于原子力显微镜的光盘表面微结构的检测

利用原子力显微镜在纳米尺度上观察了光盘(CD)和数字通用光盘(DVD)的表面微观结构,对沟槽间距、摆动幅度等参数进行了测量,进而就这些参数对存储性能的影响进行了分析。实验结果显示:CD-R和DVD-R光盘上以连续的沟槽取代坑,并组成螺旋状的轨道,DVD-R光盘的信息存储密度更大。光盘轨道间距的变化范围是摆动幅度的4倍。写入后,沟槽的深度明显变深。实验结果同时表明,利用AFM能直接测量光盘上信息位的形貌参数,进而找出影响光盘质量的直接因素。     

光盘中使用的光学薄膜

介绍了用于ＣＤ系列光盘,磁光光盘,相变光盘和ＤＶＤ系列光盘的信息记录膜,光学介质膜和反射膜材料的原理,性能要求,制膜技术以及膜层之间的匹配问题。     

采用柔性铰链实现多光盘的定位与夹紧

为适应光信息存储高密度,高容量,高速度和集成化的要求,提出一种新的单轴多盘光存储集成化方案,并设计了一种与之相适应的光盘定位与夹紧机构。该机构采用柔性铰链作为弹性元件,实现光盘的可靠定位与夹紧,具有结构紧凑,定位精度高,无间隙,无磨损,可靠性高等优点。理论分析和计算表明,能够满足光盘定位与夹紧的要求,采用该结构制作完成的原理样机,可在5000r/min的转速下平稳运转,光盘定位可靠,运行平稳,基本满足光学头信息读写的要求。     

原子力显微镜(AFM)在光盘检测及其质量控制中的应用

综述了原子力显微镜(AFM)在光盘质量检测中的应用.AFM能够在nm尺度上直接对光盘及其模板上的信息位几何结构的特征尺寸及其误差进行三维测量,从而可以建立生产工艺参数和信息位几何结构之间、信息位几何结构和盘片电气性能之间的关系,进而找出影响光盘质量的直接原因.用AFM进行光盘质量检测主要有三方面：盘片和模板表面的定性观测;信息位几何结构的半定量分析;信息位特征尺寸的统计分析.定性观测和半定量分析可以对盘片播放的高误差率、凹坑形态和块出错率、凸台形态及其表面粗糙度等参数进行有针对性的检测;而信息位特征尺寸的统计分析则可以对信息位几何结构的关键参数进行面向生产过程的统计分析.所得结论表明AFM在光盘质量检测过程中具有独特的优势.     

基于AFM的光盘形貌研究

介绍了原子力显微镜(AFM)的原理及特点。用AFM对光盘上记录信息用的凹坑结构进行了三维检测,并对测量结果进行了分析。结论表明AFM在光盘质量检测过程中具有独特的优势。     

光记录再生原理及应用

光盘是重要的光存储器，本文介绍了光盘的历史和分类，模拟和数字记录的原理，ＣＤ（光盘）和播放机的结构，以及光盘的各种应用。     

5X密度磁光盘模压预格式信息检测系统

模压预格式信息的检测是磁光盘产业化过程中质量检测体系的重要组成部分，本文介绍所研制的一套５Ｘ密度磁光秀模压预格式的检测系统，它以当代仪器发展潮流－－虚拟仪器的基本构架，实现了包括磁光盘扇区标头信号，跨道信号和推挽信号的模压预格式信息及反射率的测试，符合ＩＳＯ／ＩＥＣ１５０４１；１９９６标准规定的测试环境和测试指标。     

光盘伺服系统的实验研究

概述目前光盘存储技术发展很快,可作为计算机外存设备的只读型光盘(如 CD ROM 和一次可写光盘(WORM)已得到广泛应用,可擦型光盘(Erasable Qptical D-isk),也已问世,作为光盘守储技术之一的精密伺服技术也发展到了一个较高的水平,对光盘伺服技术的研究一直很受重视,在国际上,这方面的文章发表了很多,主要至力于提高伺服精度,近年来,国内也陆续     

可录光盘核心技术问世

国内首个拥有自主知识产权的“可录光盘信息存储材料”在深圳通过验收，标志着我国在可录光盘行业拥有自主知识产权的核心技术获得突破进展。来自国家信息产业部、清华大学光盘国家工程研究中心等相关部门负责人参加了验收。     

高密度光盘径向动态特性测量方法研究

分析了现有光盘径向动态特性测量方法的特点，深入研究了一种适用于高密度光盘径向动态特性的基于过道波形信号连续测量方法及其具体实现。比较了该方法与国际标准推荐的测量方法的测量精度，结果表明该方法精度更高，更能适应未来高密度光盘的测试要求。     

光盘轴向机械动态特性测量方法的研究

研究了光盘轴向机械动态特性和聚焦伺服系统的关系，系统研究了影响光盘轴向偏摆各分量对总偏摆的影响，据此建立光盘轴向偏摆的数学模型。根据该模型，分析了几种有代表性的测量方法的优缺点并重点研究了它们各自的测量精度，提出了一种全新的基于激光三角法的测量方法。最后给出了测量结果和结果分析。     

用于蓝宝石光盘的数字化数据存储

为了解决长时数据存储的难题,开展了以数字格式在蓝宝石光盘表面写入数据的研究工作。根据艾林方程,分析了利用常用无机材料进行数据存储的数据失效时间。描述了在蓝宝石材料为基底的光盘上以数字格式记录数据的基本工艺流程,重点介绍了用于蓝宝石光盘的离子束刻蚀系统。实验结果显示,蓝宝石光盘表面刻蚀的信息坑宽度为0.6μm,深度为0.2μm,磁道节距为1.6μm,符合ISO/IEC 10149:1995规定的CD-ROM格式数据存储要求,表明采用本文提出的方法实现蓝宝石光盘的数字化数据存储是可行的。此外,这种基本工艺流程不仅适用于蓝宝石光盘,同样适用于其它以高度稳定的材料(如石英玻璃)作为基底的光盘。     

Fabrication of high quality factor lithium niobate double-disk using a femtosecond laser

We demonstrate fabrication of a high-quality factor lithium niobate double-disk whispering-gallery microcavity using femtosecond laser assisted ion beam milling. Using this method, two vertically stacked 30-µm diameter disks with a 200-nm gap are fabricated. With our device, an optical quality factor as high as 1.35?×?10⁵ is demonstrated. Our approach is scalable to fabricate multiple disks on a single chip.     

Simple positioner with nanometer reproducibility of the focused light beam position on an object

A simple positioner, which allows one to ensure the position of a focused light beam on an object with nanometer precision and reproducibility, is proposed and studied. It can be used for positioning of focused beams (in particular, laser beams) on surfaces of optical fibers, biological objects, optical disks, thin film modulators, and holographic memory systems in the micrometer and nanometer ranges.     

Nanolubrication: Characterization of patterned lubricant films on magnetic hard disks

Patterned lubricant films on magnetic hard disks offer potential advantages in controlled bonding sites, higher average shear strength, and longer durability. However, since the lubricant film thickness is at 1 or 2 nm, characterization of the pattern is difficult. Normal atomic force microscopic techniques can only image very small area in the nanometer range and the sharp tip can potentially modify the pattern. A wide area optical technique is needed to characterize the patterns. This paper examines patterned lubricant film using an optical surface analyzer (OSA) to image the bonded phase and mobile phase of an alcohol functionalized perfluoropolyether (PFPE) on magnetic hard disks. The phase shift signal and reflectivity intensity of the polarized light spectra provide clear optical images of the lubricant film at nanometer thickness. Optical images were successfully obtained before and after the buffing process and the ramp load and unload (L/UL) testing. Results of 100% bonded, 100% mobile, and 20% zigzag patterned lubricant films confirm that the patterned lubricant films can control the bonded/mobile ratio of such films better.     

Note: an underwater multi-channel plasma array for water sterilization

A simple yet effective method to generate multi-channel plasma array in water is presented in this paper. Thin circular metal disks sandwiched between dielectric layers were used, allowing the production of large-volume underwater plasma array with higher stability. The system can be further scaled up by stacking multiple metal disks, making it suitable for large-scale industrial water treatment. Generation of UV and reactive species was identified by optical emission spectroscopy. Sterilization experiments were performed. Results show that the device was effective in deactivating E. coli in water over a wide range of initial concentrations ranging from 10(4) to 10(8) CFU/ml.     

Development of flying type head/slider for optical recording technology

Flying-type sliders with the integration of optical components were developed for Near-Field Recording (NFR) and Far-Field Recording (FFR) technologies. The key design issue was the integration of the optical components with the slider. Due to the size of the lenses mounted on it, the slider had to be relatively large, corresponding to the size of a micro-slider. Also, the non-uniform distribution of the slider body density was incorporated in the design. As for the optical disk substrate, a plastic material such as polycarbonate was investigated because of its manufacturing convenience and cost effectiveness. The flying and tribological performance of the prototype optical sliders on various media were assessed. The results showed that the tribological characteristics of the slider/disk interface were sensitive to several factors including the properties of the disk. Adequate flying characteristics of the optical sliders on glass (NFR) and plastic (FFR) disks could be attained by optimizing these parameters.     

Using the differential method of measurement to control the accuracy of precision angle measuring structures

Specific features of monitoring metrological parameters of optical scales, limbs, or code disks are considered. A concept of building an intelligent mechatronic module on the air bearing basis for a high-performance angle measuring machine is proposed. The result is achieved by using the differential method of measurement in the mechatronic module design. This method allows one to determine the contribution of the measuring setup to the resulting error of structures.