How Holographic Memory Will Work 【全像記憶體】
Kevin Bonsor/作 愛俐思/譯
以光來儲存與讀取資料的設備，一直是資料儲存技術近二十年來的研發基礎。80年
代初期的袖珍磁盤（CD）顛覆了既有技術，讓數百萬位元組（multi-megabytes）的資料全裝進直徑僅12公分、厚約1.2公釐的光碟裡。1997年，改良版CD，即數位影音光碟（DVD）問世，讓我們從此只要用一片光碟，便能儲存完整片長的電影。
CD和DVD是用於音樂、軟體、個人電腦和錄影的主要儲存方式。CD可容納783位元的資料，約1小時15分的音樂，不過新力公司計畫推出13億位元組（1.3 gigabyte）的高儲存容量CD。一片雙面雙層的DVD可容納159億位元的資料，約8小時的電影長度。上述傳統媒介尚能滿足目前需求，但儲存科技產業不因此安於現狀，他們必須快馬加鞭，精益求精，才能追上與日遽增的市場需求。CD、DVD和磁性儲存器（magnetic storage）都是將資料位元存在儲存媒介表層，科學家現在則運用一種新的光儲存技術「全像記憶體（holographic memory）」來增加儲存容量，這種技術深入儲存媒介的表面，用整個體積來儲存資料，而非僅用表層面積。。
三維資料儲存讓儲存設備體積變小，容量增加，且資料傳輸速度加快。接下來請點閱
http://computer.howstuffworks.com/holographic-memory.htm，了解全像儲存系統在未來三、四年的發展，並看看製造一台高儲存密度的桌上型全息資料儲存系統（holographic data storage system, HDSS)需要哪些元件。
Devices that use light to store and read data have been the backbone of data storage for nearly two decades. Compact discs revolutionized data storage in the early 1980s, allowing multi-megabytes of data to be stored on a disc that has a diameter of a mere 12 centimeters and a thickness of about 1.2 millimeters. In 1997, an improved version of the CD, called a digital versatile disc (DVD), was released, which enabled the storage of full-length movies on a single disc.
CDs and DVDs are the primary data storage methods for music, software, personal computing and video. A CD can hold 783 megabytes of data, which is equivalent to about one hour and 15 minutes of music, but Sony has plans to release a 1.3-gigabyte (GB) high-capacity CD. A double-sided, double-layer DVD can hold 15.9 GB of data, which is about eight hours of movies. These conventional storage mediums meet today's storage needs, but storage technologies have to evolve to keep pace with increasing consumer demand. CDs, DVDs and magnetic storage all store bits of information on the surface of a recording medium. In order to increase storage capabilities, scientists are now working on a new optical storage method, called holographic memory, that will go beneath the surface and use the volume of the recording medium for storage, instead of only the surface area.
Three-dimensional data storage will be able to store more information in a smaller space and offer faster data transfer times. In this article, you will learn how a holographic storage system might be built in the next three or four years, and what it will take to make a desktop version of such a high-density storage system.
Click here to read the article:
http://computer.howstuffworks.com/holographic-memory.htm
原文和圖片出處：
http://computer.howstuffworks.com/holographic-memory.htm
近期主題：【富豪汽車3CC】
Coming Soon: How the Volvo 3CC works
＊譯文歡迎轉載，但務必註明出處
＊請多多訂閱免費英文電子報
＊訂閱網址
http://computer.howstuffworks.com/register.htm
