Browse Prior Art Database

Magnetic Recording and Optical Readout System

IP.com Disclosure Number: IPCOM000091674D
Original Publication Date: 1968-Apr-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Brown, BR: AUTHOR [+2]

Abstract

This data storage system has transparent or reflective storage medium 1 including magnetic film 2 on which data is stored by magnetic head 3. The latter includes a plurality of separately energizable sections 4 which are used to store a single hologram representative of the data. For readout, polarized light beam 5 is generated by laser 6, directed through polarizer 7, and reflected toward medium 1 by mirror 8. Using the Faraday effect, beam 5 passes through medium 1 to analyzer 9 and is detected at photodiodes 10 to read the data. When a reflective storage medium is used, readout can also be accomplished by the Kerr magneto-optic effect in a similar manner.

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Magnetic Recording and Optical Readout System

This data storage system has transparent or reflective storage medium 1 including magnetic film 2 on which data is stored by magnetic head 3. The latter includes a plurality of separately energizable sections 4 which are used to store a single hologram representative of the data. For readout, polarized light beam 5 is generated by laser 6, directed through polarizer 7, and reflected toward medium 1 by mirror 8. Using the Faraday effect, beam 5 passes through medium 1 to analyzer 9 and is detected at photodiodes 10 to read the data. When a reflective storage medium is used, readout can also be accomplished by the Kerr magneto-optic effect in a similar manner.

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