从CD向DVD光存储发展的关键技术

１９９８年国际光存储技术从ＣＤ存储向高密数字ＤＶＤ存储发展最关键的一年，国外称之为ＤＶＤ革命。为此，着重论述了从ＣＤ向ＤＶＤ光盘发展的关键技术，包括ＤＶＤ－只读，ＤＶＤ－可录，ＤＶＤ－可随机重写等各类光盘的关键技术及相应生产线的技术升级。     

DVD展开深层次技术大战

1、可录 DVD可录式 DVD两大阵营的共同点是 ,其 DVD- RAM的数据存储量 ,约为同样大小之CD- ROM光盘的四倍 ,并可记录新数据。加入竞争的新格式有 :《DVD论坛 (DVD Forum)》提出的第二代 DVD- RAM(预计 2 0 0 1年春面世 )和先锋公司推出的 DVD- R/ W,均为 4 .7GB容量 ;NEC公司推出的5.2 GB多媒体视频文档盘片系统。而索尼与菲利浦公司则加紧开发了 3GB容量的 DVD RW。如今众多厂家推出的新一代可读写 DVD产品是向前兼容的 ,即可以读取只读 DVD盘片的内容。但新的可擦写DVD盘片的拷贝自我保护功能 ,将会阻止它在以前…     

DVD电影碟片制作技术与市场

本文系统地叙述了数码电视光盘DVD如何刻录电影片的详细制作工艺过程，也介绍了DVD各种规格的特点，包括单面单层，单面双层、双层单面、双层双面，其中单面单层DVD-5是常用规格，生产工艺成熟，其记录容量为4．7GB，可以储存一部电影的信息。DVD是基于MEG-2编码的，容许逐行序列，也容许隔行序列，但一般DVD机和DVD光盘都是按隔行扫描设计和制作的，因此用逐行扫描也难以向电视输送良好的逐行扫描信号。文中还特别指出了电影DVD光盘给电影业所带来的巨大市场和效益。     

单张光盘可容100张DVD

美国科技巨头及多元化服务企业通用电气（General Electric）2009年4月27日宣布，在数字存储技术领域取得了一项重大技术突破，其最新数字存储产品采用全息摄影技术（Holography），单张光盘的存储容量将高达500GB，相当于可存储20张蓝光（Bluray）格式DVD和100张普通DVD所存储的内容。目前该产品仍处于实验室开发阶段，但用不了多久，全球消费者都可用上这种新型光盘。     

光存储技术与光盘刻录

世界光存储技术的迅猛发展使得光盘刻录技术成为影视技术中的一个崭新领域，本文对目前在市场占主导的CD－R／RW刻录技术的操作过程进行了详细介绍，并对DVD光盘存储技术必将取代CD-R存储的发展趋势进行了论证和展望。     

蓝光进入高速发展期

<正>自从2002年2月,索尼、飞利浦、松下等九家核心公司向全世界共同发布下一代DVD光盘格式标准Blu-ray(蓝光)光盘标准,到2004年Blu-ray Disc Association(蓝光光盘协会)的成立,蓝光技术的发展和应用已经经历了近10年的历程。在数字高清和3D电视加速普及的背景下,蓝光正式进入了高速发展期。蓝光产品从独享到众享Blu-ray(蓝光)光盘格式是一种基于蓝色激光技术,面向高清影像与高容量存储应用的下一代光盘格式。目前一张单层Blu-ray光盘可达到25GB的数据存     

略论高职院校图书馆依法利用DVD光盘信息资源时应注意的问题

简要论述DVD光盘信息资源的著作权问题,提出图书馆在合法开发利用DVD光盘信息时要充分尊重著作权人的的著作权,维护著作权人的合法权益;在光盘开发过程要善于处理CSS加密,区域限制等问题;光盘信息的存储要有利于流通,有利于交流。     

能自然降解的新型塑料

据海外媒体报道,日本东京大学的研究人员日前制造出氧化钛的一种新的结晶形式,可用于制造“超级”蓝光光盘,这种光盘不仅价格更低廉,且其数据存储能力是DVD的几千倍。     

科技动态

DVD录像机在日本上市日本先锋公司宣布 ,1 999年 1 2月 3日将上市世界上首台 DVD录像机 ,定价 2 5万日元。该机所用光盘与现行单放DVD光盘容量相同 ,为 4.7GBDVD-RW光盘。用光盘标准画质可录两小时 ,若用三倍模式则可录六小时与现行录像带画质相同的图像。放像时有 2倍速、1 / 2倍速、1 / 4倍速、1 / 8倍速及 1 / 1 6倍速的快慢放功能。 DVD-RW光盘定价为3 0 0 0日元 ,至少可录像 1 0 0 0次。但因规格不同 ,DVD-RW光盘无法在目前已上市的DVD播放机上播放。先锋拟在2 0 0 0年夏推出可同时播放DVD-Video及 DVD -RW光盘的 DVD…     

氧化钛一结晶形式可成超级储存材料

据美国物理学家组织网报道，目前，蓝光是最先进的大容量光盘格式，用以储存高画质的影像和高容量的数据。日本研究人员称，他们制造出氧化钛的一种新的结晶形式，可以用于制造“超级”蓝光光盘，这种光盘不仅价格更加低廉，而且其数据存储能力是DVD的几千倍。     

Stability Comparison of Recordable Optical Discs—A Study of Error Rates in Harsh Conditions

The reliability and longevity of any storage medium is a key issue for archivists and preservationists as well as for the creators of important information. This is particularly true in the case of digital media such as DVD and CD where a sufficient number of errors may render the disc unreadable. This paper describes an initial stability study of commercially available recordable DVD and CD media using accelerated aging tests under conditions of increased temperature and humidity. The effect of prolonged exposure to direct light is also investigated and shown to have an effect on the error rates of the media. Initial results show that high quality optical media have very stable characteristics and may be suitable for long-term storage applications. However, results also indicate that significant differences exist in the stability of recordable optical media from different manufacturers.     

数字光盘抖动标准的研究

在分析光盘数据抖动源设计原理和贝塞尔零值法原理基础上,提出了基于贝塞尔零值法的数字光盘抖动测量方法.阐述了数字光盘抖动校准系统的组成结构,分析了其测量不确定度.理论分析和实验表明:其扩展不确定度为0.13%(CD模式)和0.18%(DVD模式).     

Vakuumbeschichtungstechnik optischer Datenspeicher. Vacuum Coating Technology of Optical Discs

The manufacturing of optical discs like the CD or DVD has developed to a considerable industrial branch. A review of the coating and machine development during the last 20 years is given. Key factors for efficient production are reliability and short tact times. Especially the vacuum coating technology gives its contribution to the product optimised process. Future formats will apply the blue laser for read and write. Multiple layers will increase the storage capacity further.     

影响光存储介质信息存储质量的因素暨提高光存储介质信息存储质量的方法

本文从盘片质量、刻录设备、使用和保管方法等几个方面对影响常用光存储介质（CD、DVD）信息存储质量的因素进行阐述;通过针对性研究、实验,初步形成提高光存储介质信息存储质量的有效方法和光存储介质的保管方法。     

Analog signal acquisition from computer optical disk drives for quantitative chemical sensing

Optoelectronic consumer products that are widely employed in the office and home attract attention for optical sensor applications due to (1) their cost advantage over analytical instruments produced only in small quantities, (2) robustness in operation due to the detailed manufacturability improvements, and (3) ease of operation. We demonstrate here a new approach for quantitative chemical/biochemical sensing when analog signals are acquired from conventional optical disk drives, and these signals are used for quantitative detection of optical changes of sensor films deposited on conventional CD and DVD optical disks. Because we do not alter manufacturing process of optical disks, any disk can be employed for deposition and readout of sensor films. The optical disk drives also perform their original function of reading and writing digital content to optical media because no optical modifications are introduced to obtain the analog signal. Such a sensor platform is quite universal and can be applied for chemical and biological quantitative detection, as well as for monitoring of changes of physical properties of regions deposited onto a CD or DVD (e.g., during combinatorial screening of materials). As a model example, we demonstrate the concept using chemical detection of ionic species such as Ca2+ in liquids (e.g., blood, urine, or water). Colorimetric calcium-sensitive sensor films were deposited onto a DVD, exposed to water with different concentrations of Ca2+, and quantified in the optical disk drive. The developed lab-on-DVD system demonstrated a 5 ppm detection limit of Ca2+ determinations, similar or slightly better than that achieved using a conventional fiber-optic portable spectrometer. This detection limit corresponded to a 0.023 absorbance unit resolution, as determined by the measurement of the same colorimetric films with a portable spectrometer. Determinations of Ca2+ unknowns using the lab-on-DVD system demonstrated +/-5 ppm accuracy and 2-5% relative standard deviation precision in predicting 100 ppm Ca2+.     

Collinear holography

A novel reading and writing technology for a holographic storage system called collinear holography is developed. With this method, two-dimensional page data can be recorded as volumetric holograms generated by a reference beam and a signal beam that are bundled on the same axis and irradiated on the recording medium through a single objective lens. The multiplex recording and reconstructing process is demonstrated, and it is presented that optical configuration and the dichroic media disk structure are suitable for a compact system. This method enables us to construct a small volumetric optical disk storage system with CD and DVD upper compatibility.     

主流DVD摄像机导购

本文叙述了六款日立、松下、索尼公司的DVD摄像机产品。DVD数码摄像机所使用的存储媒介是DVD刻录光盘。数码摄像机在技术上时刻推陈出新，采用MiniDV带的数码摄像机才刚刚迎来快速发展，DVD数码摄像机却已经神速的出现在了人们面前，本文扼要对此逐一介绍。     

DVD在线租赁

针对网站DVD在线租凭问题，我们建立了以线性规划为基础的单目标、多目标及混合整数规划等多个数学模型，很好的解决了DVD的分配问题。对问题一，我们建立了单目标整数模型，利用lindo数学软件包求解，求出了两种不同情况下DVD的最小购买量：对问题二，首先我们对所给的表格数据进行了规范化处理，采用倒数公式得到了每个人对每种DVD的满意度系数矩阵，然后建立了单目标混合整数规划的数学划模型，为使DVD的购买量最小且会员满意度最大，引进了权重系数ψ，通过加权组合构造了一个新的单目标的混合整数规划模型，最后使用lingo数学软件包求得了每种DVD的最小购买量以及此时DVD的分配方案。     

Comment on “optimum depth of the information pit on the data surface of a compact disk”

A novel design of HD–DVD optical pick-up head is proposed. The geometrical size of the pick-up head is reduced by using a combined system of a Penta prism and an aspherical lens. Such a combined system can replace the mirror and collimating lens in a conventional pick-up head, to achieve a miniature HD–DVD pick-up head.