JP2005327401A5 - - Google Patents
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- Publication number
- JP2005327401A5 JP2005327401A5 JP2004145644A JP2004145644A JP2005327401A5 JP 2005327401 A5 JP2005327401 A5 JP 2005327401A5 JP 2004145644 A JP2004145644 A JP 2004145644A JP 2004145644 A JP2004145644 A JP 2004145644A JP 2005327401 A5 JP2005327401 A5 JP 2005327401A5
- Authority
- JP
- Japan
- Prior art keywords
- refractive power
- lens group
- variable element
- objective lens
- power variable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Claims (6)
上記光源より出射されたレーザ光を平行にする１枚以上のコリメートレンズ群と、
アパーチャを介して入射された上記コリメートレンズ群によって平行光とされたレーザ光を光ディスクの信号記録面に集光する１枚以上の対物レンズ群と、
上記コリメートレンズ群と上記対物レンズ群との間に設けられ、屈折力を可変することにより球面収差を補正する屈折力可変素子とを備える光ピックアップにおいて、
上記屈折力可変素子の主平面から上記対物レンズ群の主平面までの距離が上記対物レンズ群の焦点距離と等しくされたことを特徴とする光ピックアップ。 A light source that emits laser light;
One or more collimating lens groups for collimating the laser light emitted from the light source;
One or more objective lens groups for condensing the laser beam that has been collimated by the collimating lens group incident through the aperture onto the signal recording surface of the optical disc;
In an optical pickup provided with a refractive power variable element that is provided between the collimating lens group and the objective lens group and corrects spherical aberration by changing refractive power,
An optical pickup characterized in that the distance from the main plane of the refractive power variable element to the main plane of the objective lens group is equal to the focal length of the objective lens group.
上記光ディスクに対して情報信号の書き込み及び／又は読み出しを行う光ピックアップとを備えた光ディスク装置において、
上記光ピックアップは、
レーザ光を出射する光源と、
上記光源より出射されたレーザ光を平行にする１枚以上のコリメートレンズ群と、
アパーチャを介して入射された上記コリメートレンズ群によって平行光とされたレーザ光を光ディスクの信号記録面に集光する１枚以上の対物レンズ群と、
上記コリメートレンズ群と上記対物レンズ群との間に設けられ、屈折力を可変することにより球面収差を補正する屈折力可変素子とを備え、
上記屈折力可変素子の主平面から上記対物レンズ群の主平面までの距離が上記対物レンズ群の焦点距離と等しくされたことを特徴とする光ディスク装置。 A disk rotation driving means for rotating the optical disk;
In an optical disc apparatus provided with an optical pickup for writing and / or reading information signals on the optical disc,
The above optical pickup
A light source that emits laser light;
One or more collimating lens groups for collimating the laser light emitted from the light source;
One or more objective lens groups for condensing the laser beam that has been collimated by the collimating lens group incident through the aperture onto the signal recording surface of the optical disc;
A refractive power variable element that is provided between the collimating lens group and the objective lens group and corrects spherical aberration by varying the refractive power;
An optical disc apparatus characterized in that the distance from the main plane of the refractive power variable element to the main plane of the objective lens group is equal to the focal length of the objective lens group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004145644A JP2005327401A (en) | 2004-05-14 | 2004-05-14 | Optical pickup |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004145644A JP2005327401A (en) | 2004-05-14 | 2004-05-14 | Optical pickup |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2005327401A JP2005327401A (en) | 2005-11-24 |
| JP2005327401A5 true JP2005327401A5 (en) | 2007-06-28 |
Family
ID=35473619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2004145644A Pending JP2005327401A (en) | 2004-05-14 | 2004-05-14 | Optical pickup |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2005327401A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100074077A1 (en) * | 2006-10-18 | 2010-03-25 | Ryuichi Katayama | Optical head device and optical information recording/reproducing device |
| WO2009125765A1 (en) * | 2008-04-10 | 2009-10-15 | 日本電気株式会社 | Optical information recording and reproducing apparatus and optical information recording and reproducing method |
| JP5240098B2 (en) * | 2009-06-30 | 2013-07-17 | 日本電気株式会社 | Optical unit and optical information recording / reproducing apparatus |
-
2004
- 2004-05-14 JP JP2004145644A patent/JP2005327401A/en active Pending
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