To: Sector Investor who wrote (17454 ) 12/13/1999 12:36:00 PM From: Robert G. Harrell Respond to of 42804
Sector, We're waiting for a song! While we wait, here is some reading on holographic data storage. Although I doubt this is the area of Prof. Fischer's expertise we are going to exploit in the newest start-up, who knows. Still looking for the article I printed out months ago but this is some pretty good stuff: Popular press article:theregister.co.uk BYTE Magazine articles: When Silicon hits its limits, what's next?byte.com Creating Holographic Storagebyte.com AN OVERVIEW OF THE FIELD OF OPTICAL DISK DATA STORAGEitri.loyola.edu Technical article:westworldproductions.com Picture diagrams:darpa.mil darpa.mil IBM article with links to a picture and discussion of their demonstration project, a discussion of material and a simple (for you and me Web) picture diagram of the physics of holography:almaden.ibm.com Ames Research Center Bacteriorhodopsin High Density Data Storage:ctoserver.arc.nasa.gov Electromagnetic MEMS Scanning Mirrors touch.caltech.edu R. Miller and Y.C. Tai, "Electromagnetic MEMS Scanning Mirrors," Optical Engineering, Vol. 36, No. 5, May 1997. We report here a new magnetic MEMS technology that enables many electromagnetic MEMS devices. This new technology combines magnetic thin films and silicon bulk micromachining. Its use is demonstrated by two types of millimeter-sized scanning mirrors that are capable of delivering deflection angles exceeding 60 degrees. Details include the design, fabrication, operation, as well as a complete electromechanical model of the mirrors. In addition, the use of the mirrors is further manifested in a holographic data storage system where hundreds of holograms have been successfully stored and retrieved. Download the full publication in Adobe© Acrobat© 3.0 Format: opteng97.pdf (size 2.71MB)touch.caltech.edu Electromagnetic MEMS Scanning Mirrors For Holographic Data Storage [Picture] Picture of MEMS mirror in the absence of applied magnetic field and coil current R. A. Miller, G. W. Burr, Y. C. Tai, D. Psaltis, C. M. Ho and R. R. Katti, "Electromagnetic MEMS Scanning Mirrors For Holographic Data Storage," Technical Digest, Solid-State Sensor and Actuator Workshop, Hilton Head Island, SC, June 3-6 (1996), pp. 183-186. touch.caltech.edu A mm-sized analog scanning MEMS mirror capable of deflection angles exceeding 60 degrees has been designed and fabricated. Development of this mirror is driven by the need for simple, compact and inexpensive 3-D volume holographic storage systems. Deflection is achieved through the control of an external magnetic field which interacts with a permalloy layer and the current in a 30-turn copper coil. Modeling of the device is also provided here and it agrees with experimental measurements. The use of the mirror is demonstrated in a holographic data storage system and hundreds of holograms have been successfully stored and retrieved. Download the full publication in Adobe© Acrobat© 3.0 Format: paper.pdf (size 2.15MB) Bouncing off the walls listening to the Doobie Brothers!! Bob