Apparatus for recording and/or reproducing data onto and/or from optical disk and method thereof

A technology for optical discs and equipment, applied in the field of optical disc equipment, to achieve the effect of improving access speed and simple manufacturing

Inactive Publication Date: 2005-06-15
SONY CORP
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to ensure a recording/playback time of 2 hours from one side of a DVD (to provide the same recording/playback time as a videocassette) and to enable

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
  • Apparatus for recording and/or reproducing data onto and/or from optical disk and method thereof
  • Apparatus for recording and/or reproducing data onto and/or from optical disk and method thereof
  • Apparatus for recording and/or reproducing data onto and/or from optical disk and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0095] Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0096] Fig. 2 is a diagram of a master device according to a first embodiment of the present invention. As described more fully below, an optical disc is manufactured by using a master device 1 to expose a master disc 2 formed thereon to a laser beam.

[0097] The original disc 2 may have a casing protection layer on the surface of, for example, a glass substrate. Such a disc can be rotated by a spindle motor 3 at a constant angular velocity consistent with the master device 1 .

[0098] The optical head 4 irradiates the laser beam L to the original disk 2 in such a manner that it is gradually displaced from the inner peripheral side to the outer peripheral side of the original disk in synchronization with the rotation of the original disk by a predetermined screw mechanism. As a result, the optical head 4 forms a spiral track from the inner peripheral s...

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

PropertyMeasurementUnit
Lengthaaaaaaaaaa
Thicknessaaaaaaaaaa
Diameteraaaaaaaaaa
Login to view more

Abstract

An apparatus for recording user data to and/or reproducing user data from an optical disc, the apparatus comprising an optical head for directing a laser beam having a wavelength of about 680 nm or less to the optical disc, the optical head having about Objectives with numerical apertures of 0.7 or greater and working distances of 560 μm or less. By utilizing such devices, a relatively large amount of data can be recorded onto an optical disc.

Description

technical field [0001] The present invention relates to optical disc devices, and more particularly to an apparatus for recording data (such as video signal data and audio signal data) to and / or reproducing data from an optical disc using a laser beam having a wavelength of 680 nm or less and a lens system having a numerical aperture (NA) of 0.7 or more and arranged with a working distance of 560 μm or less, so as to enable a large amount of data to be recorded on an optical disc. Background technique [0002] Video and / or audio data can be recorded to and / or played back from many different types of storage media, such as cassette tapes and so-called digital versatile discs (DVDs). data. However, as described below, cassette tapes and DVDs have disadvantages associated with this. [0003] The videocassette for consumer use has about 2 hours of data recorded on it. While this recording time is acceptable for consumer use, the quality of playback cannot always be acceptable...

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): G11B7/007G11B7/013G11B7/12G11B7/135G11B19/28G11B20/10G11B23/033G11B27/034G11B27/036G11B27/10G11B27/19G11B27/24G11B27/30G11B27/34G11B27/36
CPCG11B7/00718G11B7/1374G11B7/24079G11B7/24085G11B19/28G11B20/10G11B23/0332G11B27/034G11B27/036G11B27/105G11B27/24G11B27/3027G11B27/34G11B27/36G11B2020/10592G11B2220/216G11B2220/235G11B2220/2525G11B2220/2545G11B2220/2562G11B7/122G11B7/007G11B20/1426G11B7/127G11B7/139G11B2007/00709G11B2007/00754G11B2007/00727G11B2020/1453
Inventor 応和英男小林昭荣千秋进桂本伸治渡边俊夫森秀则山本真伸齐藤真树
Owner SONY CORP
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