Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Optical recording and reproducing apparatus, optical head and skew detection method

A technology for optical recording and optical recording media, which is applied in the directions of recording/reproducing, data recording, and recording information storage by optical methods, and can solve problems such as damage to optical recording media.

Inactive Publication Date: 2006-11-15
SONY CORP
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the near-field light radiation unit hits the surface of the optical recording medium, there is a risk of damaging portions of the optical recording medium on which information has already been recorded

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
  • Optical recording and reproducing apparatus, optical head and skew detection method
  • Optical recording and reproducing apparatus, optical head and skew detection method
  • Optical recording and reproducing apparatus, optical head and skew detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0058] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but it goes without saying that the present invention is not limited to these embodiments.

[0059] Figure 5 is a schematic diagram showing the arrangement of an optical recording and reproducing apparatus (including an optical head) according to an embodiment of the present invention.

[0060] Such as Figure 5 As shown, in this optical recording and reproducing apparatus, a light source 20, a collimating mirror 21, a beam splitter 22, a polarizing beam splitter 23, a quarter wave plate 24, an optical lens 25, and A near-field light radiation unit 26 composed of a suitable element such as a SIL (Solid Immersion Lens) is arranged in this order on the optical axis of light emitted from the light source 20 . Then, the first light receiving unit 27 is located on the optical path of the light reflected by the polarization beam splitter 23 , and the second l...

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

An optical recording and reproducing apparatus for recording and / or reproducing an optical recording medium by irradiating light from a light source to the optical recording medium as near-field light from a near-field light irradiating unit includes a light source for emitting light, a first light-receiving unit for receiving and detecting returned light from the optical recording medium, a second light-receiving unit for receiving and detecting returned light from the near-field light irradiating unit, a control unit for detecting a relative skew between the optical recording medium and the near-field light irradiating unit based on a plurality of gap detection signals generated from divided detection signals of the second light-receiving unit and a drive control unit for outputting a drive signal to correct a skew of at least the near-field light irradiating unit to a drive unit in response to a skew detected in the control unit.

Description

technical field [0001] The present invention relates to an optical recording and reproducing apparatus, an optical head, an optical recording and reproducing method, and a skew detection method suitable for use with an optical recording medium capable of recording and / or reproducing with radiation of near-field light. Background technique [0002] Optical recording media (or magneto-optical recording media) represented by CD (Compact Disc), MD (Mini Disc) and DVD (Digital Versatile Disc) are widely used as storage media to store music information, video information, data, programs, etc. . In systems for recording and reproducing these optical recording media, it has been customary for the objective lens to be opposed to the recording surface of the optical recording medium in a non-contact manner, to Pit and bump or phase change material reflectance change structure to read very small recording marks. If the recording medium is a magneto-optical recording medium, it has be...

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 Applications(China)
IPC IPC(8): G11B7/095G11B7/1387
Inventor 齐藤公博石本努
Owner SONY CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com