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Apparatus for two-sided writing

A device, two-sided technology, applied in the field of double-sided writing devices, to achieve the effect of rapid storage

Inactive Publication Date: 2004-11-17
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Another problem with any advanced CD-ROM writing technology is whether it is compatible with existing CD-ROM reading technology

Method used

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Embodiment Construction

[0084]In previously filed application Serial No. 08 / 626,302, filed April 1, 1996 (which was issued as Patent No. 5,684,782 on December 4, 1997, which patent is incorporated herein by reference), the signal SXI generated and used. Specifically, the inventors in this paper conclude that if a laser source is dithered back and forth across light boundaries exhibiting different optical properties, such as reflectivity, it is possible to determine and control laser position using modulated return light. In the present application, the inventors of that application extend their work to cover such sites where the main purpose is to write information on laser discs. Specifically, applicants describe herein a writing system based on various signal processing techniques demonstrated by the same inventor in several related patent applications that have already been filed.

[0085] For a more complete understanding of the invention, please turn your attention to figure 1 , showing in sch...

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Abstract

An information storage system employs rotatable disks with embedded tracks for precise control of writing and reading operations. Advantage is taken of the reference tracks on one of the disks to also control laser spot positioning on the other side of the disk. The edges of the reference tracks are employed to assure accurate positioning and the presence of multiple information tracks between adjacent reference tracks.

Description

technical field [0001] The present invention is generally directed to the manufacture and use of information storage systems employing rotatable storage devices that contain a reference track that makes it possible to perform a variety of storage and retrieval operations, including identifying The operation of each bit unit. More specifically, the invention is directed towards an optical mechanism that allows the use of two sides of a rotatable medium. More specifically, the present invention allows the use of both sides of a recordable medium without having to have reference tracks on both sides. Background technique [0002] A central aspect of the present invention relates to the recognition of the frequency doubling phenomenon that occurs when a light source with a substantially Gaussian brightness distribution dithers at high frequencies on a surface exhibiting sharp reflection discontinuities or other discontinuities in optical properties. frequency doubling phenomen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/095G11B7/00G11B7/085G11B7/09G11B7/125G11B7/135
CPCG11B7/08564G11B7/126G11B2007/0013G11B7/1362G11B7/0904G11B7/127G11B7/26
Inventor 卡斯米尔·M·德库萨蒂斯劳伦斯·雅各博威兹
Owner MEDIATEK INC
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