Basic optical unit of optical disc playing device

A playback device and optical unit technology, applied in the direction of optical recording head, optical recording/reproduction, beam source, etc., can solve the problems of low light quantity, low light efficiency, unsuitable for small and thin optical disc playback equipment, etc. Achieve the effect of easy mass production

Inactive Publication Date: 2006-03-22
LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This leads to the problem that the amount of light utilized in partial reflection and transmission is low, making the light efficiency significantly low
[0015] In order to solve such a problem, even if one beam splitter is used, Patent Application No. 1998-0025783 (Korea) proposes to use a dual pickup that scatters two laser

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Basic optical unit of optical disc playing device
  • Basic optical unit of optical disc playing device
  • Basic optical unit of optical disc playing device

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0057] Hereinafter, the embodiments of the basic optical unit of the optical disc playback device of the present invention will be described in detail based on the drawings.

[0058] However, in the process of describing the present invention, in order to prevent the specific description from damaging the core of the present invention, the description of well-known functions or structures will be omitted. In addition, the same reference numerals are given to the parts that are identical or almost identical to the above-mentioned structure, and detailed descriptions thereof will also be omitted.

[0059] The optical disc playback device is composed of a spindle that rotates the optical disc, a loading device on the optical disc loading shaft, and a pickup that records or displays the data of the optical disc.

[0060] Figure 2 to Figure 8 Shows the structure of an embodiment of the present invention: figure 2 Is a side view of the picker system, image 3 Yes figure 2 Side view ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The basic optical unit of CD player consists of the first laser diode, the second laser diode and optical path compensating plate, and can simplify the structure of double light beam pick-up. The first laser diode emits the first laser beam in the direction of light waveguide axis; the second laser diode emits the second laser beam in the wavelength different from that of the first laser beam and in the direction deviating from the light waveguide axis; and the optical path compensating plate forms grating and makes the laser beam the second laser diode emits converted to the direction of light waveguide axis. The basic optical unit of present invention is formed through lamination and this facilitates the batch manufacture and reduces the size and weight. Therefore, the present invention is suitable for use in portable instrument.

Description

(1) Technical field [0001] The present invention relates to the basic optical unit of the optical disc playing equipment, especially refers to the optical path compensating plate which makes the light emitted by the two laser diodes consistent with the axis of the optical waveguide, and can be used in small and thin optical disc playing equipment. A basic optical unit of an optical disc playback device that plays more than one medium on an optical disc playback device. (2) Background technology [0002] In general, recently, optical pickup devices intended to interchangeably play optical discs having mutually different recording densities have also been developed in various forms. [0003] figure 1 It is a conceptual diagram of a conventional optical pickup device that can play back using different media depending on the thickness of the disc. [0004] As shown in the figure, the existing optical pick-up device is made up of the following parts: the first laser diode 11 of...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G11B7/12G11B7/125G11B7/135G11B7/127G11B7/1353
Inventor 李万炯金相天
Owner LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap