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Optical pick-up with stray-light filtering element

An optical pickup, optical disc technology, applied in the directions of beam guiding devices, instruments, optical recording heads, etc., can solve the problems of increasing production cost and manufacturing time, etc.

Inactive Publication Date: 2008-08-20
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this improvement requires a large number of components for fine-tuning while increasing production cost and manufacturing time

Method used

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  • Optical pick-up with stray-light filtering element
  • Optical pick-up with stray-light filtering element
  • Optical pick-up with stray-light filtering element

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Embodiment Construction

[0044] Examples and detailed demonstrations of embodiments of the invention will now be illustrated with reference to the accompanying drawings, wherein like reference numerals refer to like elements throughout. The present invention is explained below by way of embodiments described with reference to the figures.

[0045] 2 is a perspective view schematically illustrating an optical system of an optical pickup according to an embodiment of the present invention; FIG. 3 is a plan view illustrating a configuration of the optical pickup illustrated in FIG. 2 . The optical pickup has an optical configuration using an optical path converter and light of different wavelengths to be appropriately applied to various types of optical discs having different recording densities. The optical configuration can be configured in various ways. Generally, an optical pickup projects a laser beam onto a signal recording layer of an optical disc to record data, and receives the laser beam refle...

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Abstract

To provide an optical pickup and a disc device having the same for overcoming degradation of tracking signals caused by adjacent layers during recording and / or reproducing data of an optical disc having a plurality of recording layers, The optical pickup includes: a light source for emitting light having a predetermined wavelength corresponding to the type of the optical disc; a light collecting unit for focusing the emitted light to form a spot on the signal recording layer of the optical disc, wherein the signal recording layer reflects Light as signal light, and adjacent layers of the optical disc reflect light as noise light; a photodetector for detecting a signal by receiving the signal light; and an optical element for intercepting noise light to reduce noise light entering the photodetector strength.

Description

technical field [0001] Aspects of the present invention relate to an optical pickup and a disc device having the same, and in particular, to effectively preventing tracking signals generated from adjacent layers during recording and / or reproduction of an optical disc having a plurality of recording layers A degraded optical pickup and a disc device having the same. Background technique [0002] With the continuous development of image media and audio media, optical discs for recording and storing high-definition image information and high-quality audio information for a long period of time have been developed and commercialized. [0003] Such an optical disc is a recording medium in which a large number of pits are formed on the surface to change the reflection of laser beams to record and / or reproduce information such as sound, images, documents, and the like. Conventional optical discs (such as compact discs (CDs), digital versatile discs (DVDs), etc.) are mainly used. H...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/135G11B7/13
CPCG11B7/0906G11B7/1381G11B7/13922G11B2007/0013
Inventor 金凤基
Owner SAMSUNG ELECTRONICS CO LTD