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Near field optical head driving device of superhigh compactness mother disc RW machine

An ultra-high-density, near-field optical technology applied in the field of optical storage to achieve high resolution, strong adaptability, and high positioning accuracy

Inactive Publication Date: 2003-03-12
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing optical head drive device for mastering is difficult to meet this requirement

Method used

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  • Near field optical head driving device of superhigh compactness mother disc RW machine
  • Near field optical head driving device of superhigh compactness mother disc RW machine
  • Near field optical head driving device of superhigh compactness mother disc RW machine

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Embodiment Construction

[0015] figure 1 Shown is a schematic structural diagram of the driving device of the near-field optical head of the ultra-high-density master disc recorder. Its focusing lens 1 and piezoelectric driving element 7 are coaxially bonded on the optical head support 6, and the piezoelectric driving element is a piezoelectric stack composed of four cylindrical piezoelectric ceramics 7.1 (such as figure 2 As shown), the positive and negative poles of the piezoelectric crystal are connected in parallel to form a piezoelectric driving element. The SIL optical head 2 is hemispherical, made of strontium titanate material, and embedded in the optical head carrying element 3 using micro-assembly technology; the extension of the optical head carrying element 3 has three claws 3.4 uniformly distributed along 120°, and The elastic connecting elements 5 are connected, the upper surface of the carrying element is flat, and there is a stepped hole inside, the larger diameter part is used to em...

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Abstract

A driver of near-fieldoptical head for high-compactness mother disc CD-RW device is a cylindrical device. The piezoelectric drive element is fixed to the external circular step of the optical head's supporter. The focusing lens is installed in the hole of upper step. The elastic element, bearing element and optical head are respectively fixed on the step hole of bottom. Said piezoelectric drive element can drive the supporter of optical head to move up and down for regulating the distance between mother disc and optical head SIL. The wedge track on the bottom of bearing element can be used to regulate the working gap's variation caused by surface airflow variation of mother disc. Its advantages are high stability and reliability and high compactness increased by more than one order of magnitude.

Description

technical field [0001] The invention belongs to the technical field of optical storage, and in particular relates to a novel near-field optical head drive device for an ultra-high-density master recorder used for positioning and driving a near-field optical head of an ultra-high-density master recorder. technical background [0002] Ultra-high-density and ultra-high-speed optical storage is an emerging, interdisciplinary high-tech field, which brings together electronics, mechanics, materials, manufacturing, testing and other disciplines, and has broad application prospects. In the field of optical storage technology, ultra-high-density and ultra-high-speed optical storage technology involves different research directions such as storage materials and storage systems. It is mainly suitable for traditional CD, DVD and other optical storage and recording systems. The realization of its positioning and driving functions is also designed relative to the master recording system w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/08G11B9/12
Inventor 李庆祥赵大鹏訾艳阳李玉和
Owner TSINGHUA UNIV
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