WO2008114593A1 - 光ピックアップ装置及び対物光学素子 - Google Patents
光ピックアップ装置及び対物光学素子 Download PDFInfo
- Publication number
- WO2008114593A1 WO2008114593A1 PCT/JP2008/053507 JP2008053507W WO2008114593A1 WO 2008114593 A1 WO2008114593 A1 WO 2008114593A1 JP 2008053507 W JP2008053507 W JP 2008053507W WO 2008114593 A1 WO2008114593 A1 WO 2008114593A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- optical
- region
- optical element
- luminous flux
- objective
- Prior art date
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Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1365—Separate or integrated refractive elements, e.g. wave plates
- G11B7/1367—Stepped phase plates
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1372—Lenses
- G11B7/1374—Objective lenses
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
- G11B2007/0006—Recording, reproducing or erasing systems characterised by the structure or type of the carrier adapted for scanning different types of carrier, e.g. CD & DVD
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
- Lenses (AREA)
Abstract
複雑な機構を用いることなく、低コストで、同一の光束を用いるBDとHDの一つの対物光学素子での互換を可能とする光ピックアップ装置及び対物光学素子を提供するため、波長λ1(380nm<λ1<450nm)の第1光束を出射する第1光源と、第1光束を光ディスクの情報記録面上に集光させるための対物光学素子を有する集光光学系を有する光ピックアップ装置において、対物光学素子は、少なくとも、光軸を含む第1領域と、第1領域の周囲の第2領域とに分割され、第1領域を通過した前記第1光束は第1光ディスク及び第2光ディスクの記録及び/又は再生に用いられ、第2領域を通過した第1光束は第1光ディスクの記録及び/又は再生に用いられ、集光光学系は、対物光学素子の前記第1領域に相当する領域に補正面を有し、補正面は、段差によって光軸を中心とする同心円状の複数の領域に分割されている。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009505115A JPWO2008114593A1 (ja) | 2007-03-19 | 2008-02-28 | 光ピックアップ装置及び対物光学素子 |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007-069842 | 2007-03-19 | ||
JP2007069842 | 2007-03-19 | ||
JP2007182778 | 2007-07-12 | ||
JP2007-182778 | 2007-07-12 | ||
JP2007265109 | 2007-10-11 | ||
JP2007-265109 | 2007-10-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008114593A1 true WO2008114593A1 (ja) | 2008-09-25 |
Family
ID=39765703
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2008/053507 WO2008114593A1 (ja) | 2007-03-19 | 2008-02-28 | 光ピックアップ装置及び対物光学素子 |
Country Status (2)
Country | Link |
---|---|
JP (1) | JPWO2008114593A1 (ja) |
WO (1) | WO2008114593A1 (ja) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006216141A (ja) * | 2005-02-02 | 2006-08-17 | Konica Minolta Opto Inc | 光ピックアップ装置 |
JP2006286140A (ja) * | 2005-04-04 | 2006-10-19 | Ricoh Co Ltd | 光ピックアップおよび光情報処理装置 |
JP2007317348A (ja) * | 2006-04-26 | 2007-12-06 | Ricoh Co Ltd | 光ピックアップおよび光情報処理装置 |
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2008
- 2008-02-28 JP JP2009505115A patent/JPWO2008114593A1/ja active Pending
- 2008-02-28 WO PCT/JP2008/053507 patent/WO2008114593A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006216141A (ja) * | 2005-02-02 | 2006-08-17 | Konica Minolta Opto Inc | 光ピックアップ装置 |
JP2006286140A (ja) * | 2005-04-04 | 2006-10-19 | Ricoh Co Ltd | 光ピックアップおよび光情報処理装置 |
JP2007317348A (ja) * | 2006-04-26 | 2007-12-06 | Ricoh Co Ltd | 光ピックアップおよび光情報処理装置 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2008114593A1 (ja) | 2010-07-01 |
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