Supercharge Your Innovation With Domain-Expert AI Agents!

Digital universal optical disk optical head

A technology of optical head and optical disc, which is applied in the direction of optical recording head and light beam guiding device, and can solve the problems of increasing difficulty, large volume and weight of optical head components, etc.

Inactive Publication Date: 2006-08-16
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen from the above that there are many optical components in the whole system. The laser and the optical components themselves have a certain volume and weight, and there must be a certain distance between each component. Therefore, the entire optical head assembly is bulky and heavy, which makes the tracking , The time extension of the focus servo
In addition, the optical head system has strict requirements on beam quality, and the aberration must be controlled within a small range. Therefore, each component needs to be precisely calibrated to ensure that no additional aberration is generated, which increases the technical difficulty.

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
  • Digital universal optical disk optical head
  • Digital universal optical disk optical head
  • Digital universal optical disk optical head

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] see first figure 2 , figure 2 It is the schematic diagram of the optical head of the embodiment 1 of the present invention, as can be seen from the figure, the optical head of the digital versatile disc of the present invention comprises a main optical path, on which an objective lens 17 and a collimating mirror 16 are successively provided with the same optical axis from the optical disc 18 , beam splitting prism 14, cylindrical mirror 19 and photodetector 20, this optical disk 18 is positioned at the focal plane of objective lens 17, and photodetector 20 is positioned at the focal plane of cylindrical mirror 19, and described objective lens 17 is contained in a On the actuator, it is characterized in that the plane of the cylindrical mirror 19 is attached to the bottom surface 142 of the beam splitting prism 14; a parallelogram glass body 21, the first vertical surface 213 of the glass body is bonded to the splitting prism. On the vertical side 143 of the beam pris...

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 present invention relates to an optical head for digital universal optical disk. On a main optical circuit are successively and coaxially set optical disk, object lens, collimating lens, beam splitter prism, cylindrical lens and photoelectric detector. Besides, said invention also includes the components of actuator, parallel quadrangular glass body, first laser source and second laser source, etc.

Description

technical field [0001] The invention relates to an optical head of a CD player, in particular to a DVD digital universal optical head. Background technique [0002] At present, the storage capacity of optical discs is getting larger and larger. Single-sided DVDs can store 4.7GB of information, and double-sided DVDs can store 9.4GB of information. Therefore, the requirements for reading speed are also greatly improved. One way to improve the reading speed of the optical head is to reduce the weight of the optical head, thereby reducing the inertia, so that it can track and focus quickly. The DVD system must be backward compatible, that is, it can be compatible with CD. The laser wavelength used by DVD is 650nm red light, while the laser wavelength used by CD is 780nm. Therefore, the general digital universal optical disc optical head is a dual-wavelength optical head. The current digital versatile disc optical head generally adopts a dual-wavelength laser separation method. ...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/12G11B7/135
Inventor 赵春梅阮昊
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com