Deformable reflector apparatus, optical pickup device and optical drive apparatus

A deformable mirror, mirror technology, applied in optics, optical elements, optical recording heads, etc., can solve the problems of deteriorating image formation performance, deteriorating signal writing/reading performance, etc., to suppress flatness deterioration, prevent size increase, The effect of reducing time

Inactive Publication Date: 2008-12-24
SONY CORP
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0008] Generation of spherical aberration deteriorates image forming performance and also deteriorates signal writing / reading performance

Method used

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  • Deformable reflector apparatus, optical pickup device and optical drive apparatus
  • Deformable reflector apparatus, optical pickup device and optical drive apparatus
  • Deformable reflector apparatus, optical pickup device and optical drive apparatus

Examples

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Embodiment Construction

[0043] Embodiments of the present invention will be described below.

[0044] First, the configuration of an optical disk drive apparatus including an optical pickup having a deformable mirror device according to an embodiment of the present invention will be described with reference to FIG. 1 .

[0045] The optical disc drive may be a read-only device that can only read data. The optical disc drive apparatus can read not only the optical disc D, which is a read-only ROM disc that stores data using a combination of pits and lands, but also a write-once or rewritable disc D that is one of writable discs.

[0046] Referring first to FIG. 1, an optical disc D is a multilayer optical disc having a plurality of recording layers. According to this embodiment, it is assumed that the optical disc D is a high recording density optical disc such as BD ("Blu-ray Disc" (registered trademark)). For example, writing / reading can be performed thereon using an objective lens 26 of NA=0.85 de...

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Abstract

Disclosed is a deformable mirror apparatus, optical pickup and optical drive apparatus. The deformable mirror apparatus includes a flexible member having a mirror on a surface and having a part having a different section form to form a convex on the opposite surface of the mirror such that a predetermined strength distribution is imparted to the flexible member; a base substrate; a strength securing member provided between the base substrate and the flexible member to support the flexible member from the base substrate side; and a driving section that deforms the form of the mirror by applying driving force to the opposite surface of the mirror of the flexible member.

Description

[0001] Cross application of related applications [0002] The present invention includes subject matter related to Japanese Patent Application JP 2007-160462 filed in the Japan Patent Office on Jun. 18, 2007, which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to a deformable mirror device whose mirror is deformable and an optical pickup including the deformable mirror device. The invention also relates to an optical drive for writing or reading an optical recording medium. Background technique [0004] In an optical drive apparatus for writing or reading an optical disc recording medium, for example, laser light is focused on a recording layer of the optical disc recording medium through an objective lens to read or write a signal thereon. [0005] It is known that in the case where laser light is irradiated through an objective lens, spherical aberration occurs due to a difference in the thickness of the cover ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B26/08G11B7/135
CPCG02B26/0825G02B27/0068G11B7/1362G11B7/13925G11B2007/0013
Inventor 青木直山田正裕
Owner SONY CORP
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