31 January 1989 Use Of Magnetic Tape As An Optical Storage Media
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Proceedings Volume 1018, Electro-Optic and Magneto-Optic Materials; (1989) https://doi.org/10.1117/12.950004
Event: 1988 International Congress on Optical Science and Engineering, 1988, Hamburg, Germany
Abstract
With the exception of paper and photographic film no storage media have been as thoroughly studied and improved as magnetic tape. The result is a large industry providing low cost, high quality media. In recent years the density allowed by high coercivity magnetic media crossed the micron mark thus challenging optical media for their high capacity. Optical recording on a tape offers great advantages as far as readout is concerned for the availability of highly integrated sensors such as CCD. On the other hand, writing is not easy since no individually modulated laser array with sufficient integration is available. Nor the deflection process is fast enough for high data rate recording. Therefore we studied an hybrid solution where recording is insured by a multiplexed array of magnetic heads and readout is optical through a magnetooptic converter. This converter is made of a rare earth iron garnet with perpendicular anisotropy. Domains in this garnet are coupled to the recorded pattern through the strayfield and reproduce it in a given range of spatial frequency. We shall discuss the optimization of various parameters of the garnet, as well as the performances of such a recording technique for high data rate digital recording applications.
© (1989) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
S. Neubert, J. C. Lehureau, J. Colineau, J. P. Castera, "Use Of Magnetic Tape As An Optical Storage Media", Proc. SPIE 1018, Electro-Optic and Magneto-Optic Materials, (31 January 1989); doi: 10.1117/12.950004; https://doi.org/10.1117/12.950004
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