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Optical scanning device

An optical scanning device, a technology of optical nature, applied in the direction of optical recording/reproduction, optical recording/reproduction/erasing method, recording of information on a magnetic disk, etc., can solve problems such as low absorption and reflection

Inactive Publication Date: 2006-07-12
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, it is possible to address only one information layer, while the other layers of the information carrier are either transparent or have low absorption and reflection

Method used

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  • Optical scanning device
  • Optical scanning device
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Examples

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Embodiment Construction

[0042] Figure 2 shows a rotating part and an information carrier according to the invention. The holder 202 is used to receive the information carrier 201 fixedly. The holder 202 is mounted on a rotation shaft 209 which is connected to a rotation motor (not shown in FIG. 2 ). The holder 202 and the rotating shaft 209 form a rotating part.

[0043] The information carrier 201 comprises a plurality of electrodes, for example electrodes 203 and 204 . The information carrier 201 comprises a plurality of information layers, the optical properties of which depend on the applied potential difference between two electrodes. In the example of FIG. 2 , only a part of the information carrier 201 is depicted, which corresponds to the inner part of said information carrier 201 . The information layer may be an electrode, as described in Figure 1, or the information layer may be located between two electrodes.

[0044] The holder comprises contacts, such as contacts 207 and 208 , which ...

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Abstract

The invention relates to an optical scanning device for scanning an information carrier comprising a plurality of information layers which optical properties depend on a potential difference applied between two electrodes. The optical scanning device comprises a fixed part comprising means (302) for generating a signal comprising information about a selected information layer, and a rotating part comprising means (301) for receiving the information carrier. The receiving means comprise a plurality of contacts (311-318) for connecting the electrodes, means (303) for detecting the signal, means (304) for decoding the signal and means (304) for applying a potential difference between the contacts connected to the electrodes corresponding to the selected information layer.

Description

field of invention [0001] The invention relates to an optical scanning device for scanning a multilayer information carrier. [0002] In particular the invention relates to optical disc devices and optical data storage for reading data from and / or recording data to multilayer optical discs. Background of the invention [0003] Conventional optical scanning devices generally comprise a clamper on which an optical disc, such as a DVD (DVD stands for Digital Versatile Disc), is secured prior to scanning. The optical scanning device includes a rotary motor to rotate the holder and the information carrier. The rotating information carrier is scanned by a light beam to read information already written in the helical track, or to write information into the helical groove. [0004] European patent applications 03290470.8, 03290471.6 and 03290473.2 filed on February 27, 2003 are devoted to information carriers comprising a plurality of information layers whose optical properties de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/0037G11B7/00G11B7/004G11B7/24G11B7/24033G11B7/24038G11B19/20
CPCG11B19/2009G11B2007/0013G11B7/0037G11B7/004G11B19/20G11B7/00
Inventor E·梅因德斯M·范德马克A·帕迪J·维尔德比克J·卡尔曼
Owner KONINK PHILIPS ELECTRONICS NV