JP2006053994A5 - - Google Patents
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- Publication number
- JP2006053994A5 JP2006053994A5 JP2004234574A JP2004234574A JP2006053994A5 JP 2006053994 A5 JP2006053994 A5 JP 2006053994A5 JP 2004234574 A JP2004234574 A JP 2004234574A JP 2004234574 A JP2004234574 A JP 2004234574A JP 2006053994 A5 JP2006053994 A5 JP 2006053994A5
- Authority
- JP
- Japan
- Prior art keywords
- optical
- information recording
- laser light
- recording surface
- optical pickup
- 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
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Claims (3)
上記レーザ光の光路上に設けられ、上記第１及び第２の光ディスクの基盤厚の中間値を基盤厚とする仮想ディスクの情報記録面に生じる球面収差を最適化するように、レンズ面の形状が設定された対物レンズ
を具えることを特徴とする光ピックアップ。 Laser light emitted from a laser light source is irradiated onto one of the information recording surfaces of the first and second optical discs on which information is recorded in the same format with different base thicknesses, and modulated by the information recording surface. In an optical pickup adapted to detect a change in the amount of laser light,
The shape of the lens surface is optimized so as to optimize the spherical aberration generated on the information recording surface of the virtual disk provided on the optical path of the laser beam and having a base thickness that is an intermediate value between the base thicknesses of the first and second optical disks. An optical pickup characterized by comprising an objective lens set with.
ことを特徴とする請求項１に記載の光ピックアップ。 When the base thickness of the first optical disk is 0.9 [mm] and the base thickness of the second optical disk is 1.2 [mm], the base thickness of the virtual disk is set to 1.0 [mm] or more and 1.2 [mm]. The optical pickup according to claim 1, wherein the optical pickup is set within a range of less than [mm].
上記光ピックアップは、The above optical pickup
上記レーザ光の光路上に設けられ、上記第１及び第２の光ディスクの基盤厚の中間値を基盤厚とする仮想ディスクの情報記録面に生じる球面収差を最適化するように、レンズ面の形状が設定された対物レンズThe shape of the lens surface is optimized so as to optimize the spherical aberration generated on the information recording surface of the virtual disk provided on the optical path of the laser beam and having a base thickness that is an intermediate value between the base thicknesses of the first and second optical disks. Objective lens set with
を具えることを特徴とする光ディスク装置。An optical disc apparatus comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004234574A JP2006053994A (en) | 2004-08-11 | 2004-08-11 | Optical pickup |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004234574A JP2006053994A (en) | 2004-08-11 | 2004-08-11 | Optical pickup |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2006053994A JP2006053994A (en) | 2006-02-23 |
| JP2006053994A5 true JP2006053994A5 (en) | 2007-07-05 |
Family
ID=36031372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2004234574A Pending JP2006053994A (en) | 2004-08-11 | 2004-08-11 | Optical pickup |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2006053994A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4797796B2 (en) * | 2006-05-25 | 2011-10-19 | 株式会社ケンウッド | Optical disc playback apparatus, optical disc playback method, and optical disc playback program |
| EP4239378A1 (en) * | 2016-09-13 | 2023-09-06 | Facebook Technologies, LLC | Fresnel lens with dynamic draft for reduced optical artifacts |
| JP7001345B2 (en) * | 2017-01-17 | 2022-02-03 | マクセルフロンティア株式会社 | Diffractive lens and in-vehicle lamp using it |
-
2004
- 2004-08-11 JP JP2004234574A patent/JP2006053994A/en active Pending
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