Lens holder and optical pickup apparatus using the same

A lens holding and condensing lens technology, applied to head configuration/installation, optical recording/reproduction, optical head manufacturing, etc., can solve problems such as performance degradation, adjustment deviation of each objective lens, and complicated adjustment operations , to achieve the effect of improving stability and suppressing forming deviation

Inactive Publication Date: 2011-08-31
SANYO ELECTRIC CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] When attaching the objective lens 321, the operator adjusts the angle of each objective lens, and there is a problem of deviation due to coma aberration of each objective lens 321, and adjustment deviation due to operator's proficiency, etc.
In addition, if there is a factor of molding variation of the lens holder in addition to this, the adjustment variation will become larger, and there is a problem of increased man-hours due to performance degradation and complicated adjustment work.
[0022] When two objective lenses are mounted on one lens holder, there is also a problem that it affects the adjustment deviation of each objective lens and the correction deviation of relative coma

Method used

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  • Lens holder and optical pickup apparatus using the same
  • Lens holder and optical pickup apparatus using the same
  • Lens holder and optical pickup apparatus using the same

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Embodiment Construction

[0051] Next, use Figure 1 to Figure 11 Embodiments of the present invention will be described in detail.

[0052] refer to figure 1 with figure 2 The optical system of the optical pickup device according to the first embodiment of the present invention will be roughly described. figure 1 It is a schematic diagram showing the optical system of the optical pickup device 50 of this embodiment. figure 2 is a schematic diagram showing the relationship between the optical disc and the optical system, and is figure 1 a-a sectional view. figure 2 Represents the relationship between the position of the objective lens 31 and the position of the signal recording layer R1 provided on the first optical disc D1, the relationship between the position of the objective lens 31 and the position of the signal recording layer R2 provided on the second optical disc D2, and the relationship between the position of the objective lens 31 and the position of the signal recording layer R1 pr...

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Abstract

The invention provides a lens holder and an optical pickup apparatus using the same. When an objective lens is mounted on a lens holder and deformation deviation occurs on a contact surface of the lens holder contacting with a peripheral part, when the objective lens can not be stably mounted, the problem that the adjustment of the coma aberration of the lens after mounting the objective lens is relative complicated and the adjustment deviation of the coma aberration becomes larger. Provided is a lens holder comprising: a mounting hole into which a condenser lens part of the objective lens is to be inserted; a peripheral part which surrounds the mounting hole and on which a flange part of the objective lens is to be mounted; and three protrusions provided in the peripheral part to be spaced apart from each other and to protrude higher than a main surface of the peripheral part. Also provided is an optical pickup apparatus comprising the lens holder and an objective lens supported with a condenser lens part inserted into the mounting hole of the lens holder, and with the flange part being in contact with the three protrusions.

Description

technical field [0001] The present invention relates to a lens holder for supporting an objective lens for reading a signal recorded on an optical disc and for recording a signal to the optical disc, and an optical pickup device using the lens holder. Background technique [0002] As an optical disc device capable of performing a signal readout operation and a signal recording operation by irradiating laser light irradiated from an optical pickup device on the signal recording layer of the optical disc, it is generally popularized to use what is called a CD (Compact Disc, small laser disc). Disc) format, DVD format (Digital Versatile Disc, Digital Versatile Disc) optical disc device. In addition, recently, an optical disc device using an optical disc with increased recording density, namely Blu-ray Disc (Blu-ray Disc, hereinafter abbreviated as BD) format, HD DVD (High Density Digital Versatile Disk, High-Resolution Digital Versatile Disc) format disc. [0003] The install...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/09G11B7/095
CPCG11B7/1374G11B7/22
Inventor 桥本光宏川崎良一
Owner SANYO ELECTRIC CO LTD
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