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Optical scanning device

A technology of optical scanning device and lens holder, applied in optical recording head, configuration/installation of head, recording/reproducing by optical method, etc., can solve the problems of heating lens holder, short access time, tilting of objective lens, etc.

Inactive Publication Date: 2005-03-09
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, they are more sensitive to resonance phenomena, tilting of the objective lens and thermal load than other parallel guides
On the other hand, especially for high-speed applications and to achieve short access times, high currents are required in the tracking and focusing coils, which heat the lens holder and lead to undesired rocking of the lens holder and to tilting of the objective

Method used

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  • Optical scanning device
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Embodiment Construction

[0042] Consistent reference numerals are used in the various drawings.

[0043] figure 1 A schematic plan view of an optical scanning device for high-speed recording and / or reproducing information according to the present invention is shown in , figure 2 A schematic side view is shown. The optical scanning device includes an actuator substrate AP and an actuator, the actuator is formed by a lens holder LH and a lens L, and the lens holder LH has a focus coil FC and a tracking coil TC. The lens holder LH is connected by elastic wires SW to a wire holder WH mounted on said actuator base plate AP. The wires SW elastically support the lens holder LH on the actuator base plate AP and enable the lens L to be pivoted from an intermediate position in the focusing direction and in the tracking direction for scanning the optical recording medium. The wires generally consist of copper wires and are connected to the lens holder LH and the wire holder WH by a soldered connection. Said...

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Abstract

The invention relates to an optical scanning device for apparatuses for recording and / or reproducing information on optical recording media, which is suitable in particular for recording and / or reproducing information at high speed, such as, for example, the scanning of a DVD at a twelve-fold speed. According to the invention, the optical scanning device has a lens holder which is formed by a hollow body and whose side walls are arranged such that they run at an angle to a connecting point with its elastic support. The thus hexagonally formed lens holder has advantageous air chambers and an enlarged distance from the lens, and also an elastic support deviating from a parallel guide, which lead to a low degree of lens tilting, improved guidance properties and a natural resonance behaviour which is necessary for scanning at high speed. The field of application relates to the production of scanning devices for optical recording media which are provided for recording and / or reproducing information at high speed.

Description

[0001] This application is a divisional application of an invention patent application whose title is "light scanning device", the application date is October 16, 2000, the application number is 00814900.3, and the applicant is Thomson Charter Company. technical field [0002] The present invention relates to an optical scanning device on an apparatus for recording and / or reproducing information on an optical recording medium, the optical scanning device is particularly suitable for recording and / or reproducing information at high speed, such as a DVD scanned at 12x speed. Background technique [0003] Optical scanning devices for recording media in compact discs and CD players are already known. The structure and function of such a scanning device known as an optical pickup is described in Electronic Components & Applications, Vol. 6 No. 4, 1984, pp. 209-215. Such a scanning device has a so-called actuator, on which an objecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/09G11B7/12
CPCG11B7/0935G11B7/0932G11B7/0933G11B7/093H05K13/0465G11B2220/2562
Inventor 于尔根·卡登克劳斯·奥尔德曼铃木恒雄
Owner THOMSON LICENSING SA