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Method for checking optical pickup apparatus and optical pickup apparatus

A technology of an optical pickup device and an inspection method, which is applied in the directions of optical recording head and optical head manufacturing, etc., can solve the problems of optical pickup device performance, large quality deviation, unsatisfactory performance, etc.

Inactive Publication Date: 2009-07-22
SANYO ELECTRIC CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, there is a problem that the performance and quality of the optical pickup devices of each manufacturer vary greatly, and satisfactory performance cannot be obtained when the user uses it as an optical disc device such as a player or a drive.

Method used

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  • Method for checking optical pickup apparatus and optical pickup apparatus
  • Method for checking optical pickup apparatus and optical pickup apparatus
  • Method for checking optical pickup apparatus and optical pickup apparatus

Examples

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Embodiment Construction

[0061] figure 1 It is a circuit block diagram showing an example of an inspection device for an optical pickup device that implements an inspection method for an optical pickup device according to the present invention, and the inspection object of the inspection device is suitable for an optical pickup device corresponding to a high-density optical disc whose density is higher than that of a DVD, In this embodiment, it is an optical pickup device corresponding to an optical disc for HD_DVD of the HD_DVD standard.

[0062] exist figure 1 Among them, the optical pick-up device 1 of the specifications corresponding to the HD_DVD standard (such as laser wavelength 405nm, NA (numerical aperture: numerical aperture) of the objective lens 0.65) drives the laser light source through the laser drive circuit 3 according to the control of the laser control circuit 2. HD_DVD The optical disc D is irradiated with laser light, and the reflected light from the optical disc D is received ...

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Abstract

The invention relates to an inspection method of an optical pick-up device and the optical pick-up device thereof. The following questions exist formerly: the optical pick-up device cannot be estimated by using fixed method so that it is difficult to have quality management and performance evaluation wastes time. The optical pick-up device is inspected by using reappearance signal evaluation of more than two kinds of test optical disks such as a first test optical disk using the recording layer as a monolayer and a second test optical disk using the recording layer as double layers. Therefore, the optical pick-up device can be inspected according to reappearance signal, and the quality management of the optical pick-up device is carried out by using fixed evaluation method irrespectively with the manufacturer.

Description

technical field [0001] The present invention relates to a kind of inspection method of optical pick-up device and the optical pick-up device after checking qualified by this inspection method, especially a kind of recording used in HD_DVD (High Definition Digital Versatile Disc: High Definition Digital Versatile Disc) A preferred inspection method for optical pickup devices used when reproducing the characteristics of optical pickup devices. Furthermore, it relates to the optical pickup device which passed the inspection by this inspection method. Background technique [0002] Among optical discs that optically reproduce signals and / or record signals using laser light, use blue-violet (blue) laser light (for example, 405 nm) to achieve higher recording density than DVD (Digital Versatile Disc: Digital Versatile Disc) standard, HD_DVD standard is known. In an HD_DVD with a diameter of 12 cm, about 15 Gbytes of data can be recorded in a single recording layer, and about 30 G...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/22G11B7/24097
Inventor 中谷守雄鹫见聪日比野清司
Owner SANYO ELECTRIC CO LTD
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