WO2009044671A1 - 対物レンズ - Google Patents
対物レンズ Download PDFInfo
- Publication number
- WO2009044671A1 WO2009044671A1 PCT/JP2008/067430 JP2008067430W WO2009044671A1 WO 2009044671 A1 WO2009044671 A1 WO 2009044671A1 JP 2008067430 W JP2008067430 W JP 2008067430W WO 2009044671 A1 WO2009044671 A1 WO 2009044671A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- objective lens
- thickness
- reproducing
- satisfying
- thin
- Prior art date
Links
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
- G11B7/1372—Lenses
- G11B7/1374—Objective lenses
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
- Optical Head (AREA)
Abstract
像高特性が良好であり、作動距離やコバ厚をある程度取りながらレンズ厚をできるだけ小さくした対物レンズを提供する。光記録媒体の記録再生に用いられる対物レンズであって、互いに対向する第1面と第2面のうち少なくとも一面が非球面に形成され、下記の式を満たすことを特徴とする対物レンズ。t<1.1・fかつ、t>1.52・f-0.79(ただし、t:対物レンズの軸上厚さ、f:対物レンズの焦点距離)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007257201A JP2010281847A (ja) | 2007-10-01 | 2007-10-01 | 対物レンズ |
JP2007-257201 | 2007-10-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009044671A1 true WO2009044671A1 (ja) | 2009-04-09 |
Family
ID=40526100
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2008/067430 WO2009044671A1 (ja) | 2007-10-01 | 2008-09-26 | 対物レンズ |
Country Status (2)
Country | Link |
---|---|
JP (1) | JP2010281847A (ja) |
WO (1) | WO2009044671A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012048768A (ja) * | 2010-08-24 | 2012-03-08 | Konica Minolta Opto Inc | 光ピックアップ装置用の対物レンズ及び光ピックアップ装置 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010027183A (ja) * | 2008-07-24 | 2010-02-04 | Hoya Corp | 光情報記録再生装置用対物レンズ、および光情報記録再生装置 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0772386A (ja) * | 1993-06-23 | 1995-03-17 | Asahi Glass Co Ltd | 光ディスク用対物レンズ |
JPH0829682A (ja) * | 1994-12-19 | 1996-02-02 | Konica Corp | 光情報記録媒体の記録再生用対物レンズ |
JP2003077171A (ja) * | 2001-08-13 | 2003-03-14 | Samsung Electronics Co Ltd | 光ピックアップ装置及びこれに適用される記録媒体 |
JP2003091854A (ja) * | 2001-09-18 | 2003-03-28 | Pentax Corp | 光ヘッド用対物レンズおよびこれを用いた光ヘッド |
JP2003107341A (ja) * | 2001-09-28 | 2003-04-09 | Pentax Corp | 光ピックアップ用対物光学系 |
JP2008123573A (ja) * | 2006-11-08 | 2008-05-29 | Hitachi Maxell Ltd | 光ピックアップレンズ |
-
2007
- 2007-10-01 JP JP2007257201A patent/JP2010281847A/ja not_active Withdrawn
-
2008
- 2008-09-26 WO PCT/JP2008/067430 patent/WO2009044671A1/ja active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0772386A (ja) * | 1993-06-23 | 1995-03-17 | Asahi Glass Co Ltd | 光ディスク用対物レンズ |
JPH0829682A (ja) * | 1994-12-19 | 1996-02-02 | Konica Corp | 光情報記録媒体の記録再生用対物レンズ |
JP2003077171A (ja) * | 2001-08-13 | 2003-03-14 | Samsung Electronics Co Ltd | 光ピックアップ装置及びこれに適用される記録媒体 |
JP2003091854A (ja) * | 2001-09-18 | 2003-03-28 | Pentax Corp | 光ヘッド用対物レンズおよびこれを用いた光ヘッド |
JP2003107341A (ja) * | 2001-09-28 | 2003-04-09 | Pentax Corp | 光ピックアップ用対物光学系 |
JP2008123573A (ja) * | 2006-11-08 | 2008-05-29 | Hitachi Maxell Ltd | 光ピックアップレンズ |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012048768A (ja) * | 2010-08-24 | 2012-03-08 | Konica Minolta Opto Inc | 光ピックアップ装置用の対物レンズ及び光ピックアップ装置 |
Also Published As
Publication number | Publication date |
---|---|
JP2010281847A (ja) | 2010-12-16 |
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