Supercharge Your Innovation With Domain-Expert AI Agents!

Optical pickup and optical disc apparatus

一种光学拾取器、光盘的技术，应用在光束引导装置、光学、光学元件等方向，能够解决光盘装置尺寸或者制造成本增大等问题

Inactive Publication Date: 2007-02-14
SONY GRP CORP
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the size or manufacturing cost of the optical disc device may increase or increase

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 pickup and optical disc apparatus
  • Optical pickup and optical disc apparatus
  • Optical pickup and optical disc apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] An optical disc device using an optical pickup to which the present invention is applied will be described below with reference to the accompanying drawings.

[0027] Such as figure 1 As shown, the optical disc device 1 applying the present invention includes: an optical pickup 3 for recording information on an optical disc 2 and reproducing information from the optical disc 2; a spindle motor 4 used as a driving device for rotating the optical disc 2 and a feed motor 5 for moving the optical pickup 3 in the radial direction of the optical disc 2. The optical disc device 1 allows recording on and / or reproduction from a plurality of types of optical discs in different formats, thereby achieving compatibility.

[0028] The optical disc 2 used in this embodiment is, for example, CD (Compact Disc), DVD (Digital Versatile Disc), CD-R (Compact Disc Recordable) and DVD-R (DVD Recordable) to which information can be added and written, and available in CD-RW (Rewritable Disc)...

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
wavelengthaaaaaaaaaa
wavelengthaaaaaaaaaa
wavelengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to an optical pickup which includes first to third light sources each emitting a light beam each having a first to third wavelength; an objective lens condensing each of the light beams emitted from the light sources on a signal recording face of an optical disc; a collimator lens provided between the light sources and the objective lens to convert a divergent angle of each of the light beams emitted from the light sources so as to obtain a parallel light beam; and a diffractive optical element provided between the collimator lens and the objective lens. The diffractive optical element includes first and second diffractive parts which respectively diffract the light beam having the second wavelength and the third wavelength. The second diffractive part has a diffraction structure formed by a plurality of concentric ring zones, having first to fourth optical faces, each having a different height in an optical axis direction.

Description

[0001] Cross References to Related Applications [0002] The present invention contains subject matter related to Japanese Patent Application JP 2005-231274 filed in the Japan Patent Office on Aug. 9, 2005, the entire content of which is hereby incorporated by reference. technical field [0003] The present invention relates to an optical pickup and an optical disc device which record information on and / or reproduce information from various types of information recording media such as optical discs using light beams of different wavelengths. Background technique [0004] As a next-generation optical disc format, currently adopted is a format using a blue-violet semiconductor laser emitting a beam of light having a wavelength of approximately 400 nm to 410 nm as a light source. [0005] In order to provide an optical pickup compatible with next-generation optical discs, an optical pickup having compatibility with different formats of optical discs, such as existing CD (Compac...

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): G11B7/12G11B7/135
CPCG02B27/4294G02B27/42G11B2007/0006G02B27/4238G11B7/1353
Inventor 齐藤政宏
Owner SONY GRP CORP
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