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Spherical aberration compensation actuator and optical pickup system

一种球面像差、致动器的技术，应用在光学记录头、用光学方法记录/重现、仪器等方向，达到降低制造成本的效果

Inactive Publication Date: 2005-07-13
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, due to the need for real-time position information feedback when providing a separate motor servo system, additional circuitry is required

Method used

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  • Spherical aberration compensation actuator and optical pickup system
  • Spherical aberration compensation actuator and optical pickup system
  • Spherical aberration compensation actuator and optical pickup system

Examples

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Embodiment Construction

[0044] Now, preferred embodiments of the present invention will be described in detail, examples thereof being illustrated in the accompanying drawings.

[0045] image 3 is a perspective view illustrating a spherical aberration compensation actuator according to the present invention, Figure 4 yes image 3 An exploded perspective view of , and Figure 5 is description Figure 4 A perspective view of the partially bonded state.

[0046] refer to Figure 3 to Figure 5 , the spherical aberration compensation actuator includes: a lens holder 210, on which a collimating lens 211 is installed, and is used for the operation of the optical axis direction; a magnetic circuit, including a coil 212 located on the left side / right side of the lens holder , a magnet 213 and a yoke 215 for operating the lens holder 210; a yoke plate 214 with a yoke 215 protruding from its left / right side; shaft guide grooves 204 and 205 and a shaft 207 for guiding the lens The operation of the frame ...

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PUM

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Abstract

A spherical aberration compensation actuator (200) and an optical pickup system are provided. The spherical aberration compensation actuator (200) mounts an element for compensating a spherical aberration and operates to a single-axis direction on an optical path using electromagnetic force. The optical pickup system includes a laser diode (321), an object lens (335), a spherical aberration compensation actuator (200), an optical path changer, and an optical detector (327). The spherical aberration compensation actuator (200) is installed on an optical path between the laser diode (321) and the object lens (335) and includes a lens holder having a spherical aberration compensation element for compensating a spherical aberration generated due to light passing through the object lens (335) and operating in an optical-axis direction using electromagnetic force. A spherical aberration compensation servo (329) controls the spherical aberration compensation actuator (200) on the basis of a jitter signal from a jitter signal detector (328) from the optical detector (327).

Description

technical field [0001] The present invention relates to an optical pickup system, and more particularly, to a spherical aberration compensation actuator and an optical pickup system capable of compensating spherical aberration by operating a spherical aberration compensation element disposed along a uniaxial direction on an optical path. Background technique [0002] Due to the trend of optical recording technology toward high density, laser diodes with shorter wavelengths and objective lenses with larger numerical apertures (NA) are widely used. [0003] Due to this tendency, an optical system using a blue light diode (BD) or the like has been proposed. In an optical system of such a blue light diode (BD), a blue laser beam with a short wavelength (eg, 405 nm) and a large numerical aperture (eg, NA=0.85) is used. [0004] figure 1 It is a structural schematic diagram of a BD-type optical pickup system in the prior art. [0005] Such as figure 1 As shown, the optical sys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/085G11B7/09G11B7/135
CPCG11B7/0925G11B7/1378G11B7/13927G11B7/085
Inventor 李星薰崔仁好金珍阿朴宽禹
Owner LG ELECTRONICS INC
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