Unlock instant, AI-driven research and patent intelligence for your innovation.

Information recording/reproducing device and optical pickup

A technology of optical pickup and reproducing device, which is applied in the direction of optical recording/reproducing, data recording, information storage, etc., and can solve the problems of increasing the size of optical disc devices, etc.

Inactive Publication Date: 2008-01-30
CANON KK
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This means that the base member 79 on which the photodetector 98 and the semiconductor laser 80 are arranged protrudes more from the projection plane, resulting in an increase in the size of the entire optical disc device.

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
  • Information recording/reproducing device and optical pickup
  • Information recording/reproducing device and optical pickup
  • Information recording/reproducing device and optical pickup

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0024] A first embodiment of the present invention will be described below with reference to FIGS. 1 and 2 . Fig. 1 shows an optical pickup 1 according to a first embodiment of the present invention.

[0025] The configuration of the optical pickup 1 will be described with reference to FIG. 1 .

[0026] The optical pickup 1 has an optical base 2 on which a semiconductor laser 3 as a light source, a polarizing beam splitter 4 as a splitter, a collimator 11, a quarter-wave plate 12, a deflection mirror 5, and a photodetector RF servo sensor 6, objective lens actuator 8, sensor lens 9 and monitoring sensor 13 of the device. The objective lens actuator 8 supports the objective lens 7 in the focusing direction and the tracking direction with respect to the recording track of the optical disc 10 in a bidirectional shaft drivable manner. The objective lens actuator 8 has a known structure such as a four-wire structure, and thus a description of its structure will be omitted.

[00...

no. 2 example

[0054] A second embodiment of the present invention will now be described with reference to FIG. 4 .

[0055] The basic concept of the second embodiment is similar to that of the first embodiment. Accordingly, components equivalent to those in the first embodiment are denoted by the same reference numerals, and descriptions of these components will not be repeated.

[0056] FIG. 4 shows an optical pickup 1 according to the second embodiment.

[0057] The basic configuration of the optical pickup 1 is similar to that of the first embodiment. In the second embodiment, the optical axis extending from the deflection mirror 5 to the RF servo sensor 6 via the polarizing beam splitter 4 is arranged to be inclined at an angle θ toward the inner periphery of the optical disc 10 with respect to the direction perpendicular to the moving direction of the optical pickup 1 . Also, the semiconductor laser 3 is arranged on the inner peripheral side of the optical disc 10 with respect to th...

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 information recording / reproducing device includes an optical pickup and traversing means for moving the optical pickup in a radial direction of a disc-shaped recording medium. The optical pickup includes a splitter for splitting light emitted from a light source into transmitted light and reflected light, an objective lens for focusing the transmitted light onto the recording medium, a deflecting mirror for guiding the transmitted light to the objective lens, and a photo detector that detects light reflected by the recording medium. The light source, splitter, and deflecting mirror are arranged on the optical pickup such that a light axis extending from the light source to the deflecting mirror is slanted towards an inner periphery of the recording medium with respect to a direction perpendicular to a moving direction of the optical pickup. The photo detector is disposed at an inner periphery side of the recording medium relative to the light axis.

Description

technical field [0001] The present invention relates to information recording / reproducing devices such as optical disc devices for CDs, DVDs, and Blu-ray discs, and optical pickups. Background technique [0002] In recent years, optical disc devices have been used as storage devices for video camcorders. Such an optical disc device is preferably reduced in size in the projection plane of the disc. In order to achieve downsizing of the optical disc device in the projection plane of the disc, it is necessary to reduce the amount of protrusion of the optical disc device with respect to the outer contour of the optical disc. [0003] 5 and 6 show a prior art optical disc device disclosed in Japanese Patent Laid-Open No. 7-201044. The configuration of the optical pickup unit 78 will be described below. [0004] The optical pickup unit 78 has: a base member 79 on which a semiconductor laser 80 as a light source, a beam splitter 82 as a splitting device, a photodetector 98 as a ...

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): G11B7/08
CPCG11B7/12G11B7/08582G11B7/1395G11B7/1362
Inventor 鸟居信之介
Owner CANON KK