JP2010176845A5 - - Google Patents
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- JP2010176845A5 JP2010176845A5 JP2010107433A JP2010107433A JP2010176845A5 JP 2010176845 A5 JP2010176845 A5 JP 2010176845A5 JP 2010107433 A JP2010107433 A JP 2010107433A JP 2010107433 A JP2010107433 A JP 2010107433A JP 2010176845 A5 JP2010176845 A5 JP 2010176845A5
- Authority
- JP
- Japan
- Prior art keywords
- radius
- δsag2
- optical
- light source
- optical disk
- 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.)
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- 230000003287 optical Effects 0.000 claims 7
- 230000005540 biological transmission Effects 0.000 claims 2
- 239000000758 substrate Substances 0.000 claims 1
Claims (1)
前記第1の面と反対側の光ディスク基板及び光ディスク内光透過層からなる光ディスクに対向する側の第2の面とを備え、
専ら波長が410nm以下の前記レーザ光源からの光束を、
前記光ディスクに集光する開口数NAが0.84以上で、
前記レーザ光源からの平行光束に対しては、前記光ディスク内光透過層の表面から0.0875mmの面間隔の位置に集光する単レンズであって、
有効径Dが2.0≦D≦2.1mmであって、
前記第1の面の曲率半径r1が0.7512375≦r1≦0.8427213mmであり、
前記第2の面は、光軸からレンズ外径に向かって、半径h1、半径h2、半径h3(h1<h2<h3)とした場合、
半径h1、半径h2、半径h3での各サグ量をsag1、sag2、sag3とし、各サグの変化量をΔsag1、Δsag2、Δsag3としたときに、
Δsag1>Δsag2、及びΔsag2<Δsag3を満足するh1、h2、h3が存在する面形状であり、
波長405nmでの屈折率nが1.51≦n≦1.64である
ことを特徴とする光ピックアップレンズ。 A continuous first surface on which a light beam from a laser light source is incident;
An optical disk substrate opposite to the first surface, and a second surface on the side facing the optical disk comprising a light transmission layer in the optical disk,
A light beam from the laser light source having a wavelength of 410 nm or less exclusively,
The numerical aperture NA focused on the optical disc is 0.84 or more,
For a parallel light beam from the laser light source, a single lens that collects light at a surface interval of 0.0875 mm from the surface of the light transmission layer in the optical disc,
What effective diameter D is 2.0 ≦ D ≦ 2.1 mm der,
The radius of curvature r1 of the first surface is 0.7512375 ≦ r1 ≦ 0.8427213 mm,
When the second surface has a radius h1, a radius h2, and a radius h3 (h1 <h2 <h3) from the optical axis toward the lens outer diameter,
When the sag amounts at the radius h1, the radius h2, and the radius h3 are sag1, sag2, and sag3, and the amount of change of each sag is Δsag1, Δsag2, and Δsag3,
A surface shape in which h1, h2, and h3 satisfying Δsag1> Δsag2 and Δsag2 <Δsag3 exist,
An optical pickup lens, wherein the refractive index n at a wavelength of 405 nm is 1.51 ≦ n ≦ 1.64 .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010107433A JP5005066B2 (en) | 2010-05-07 | 2010-05-07 | Optical pickup lens |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010107433A JP5005066B2 (en) | 2010-05-07 | 2010-05-07 | Optical pickup lens |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2006303396A Division JP4850032B2 (en) | 2006-11-08 | 2006-11-08 | Optical pickup lens |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2011197138A Division JP5000001B2 (en) | 2011-09-09 | 2011-09-09 | Optical pickup lens |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2010176845A JP2010176845A (en) | 2010-08-12 |
JP2010176845A5 true JP2010176845A5 (en) | 2011-06-23 |
JP5005066B2 JP5005066B2 (en) | 2012-08-22 |
Family
ID=42707602
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2010107433A Active JP5005066B2 (en) | 2010-05-07 | 2010-05-07 | Optical pickup lens |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP5005066B2 (en) |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW504582B (en) * | 1999-09-01 | 2002-10-01 | Konishiroku Photo Ind | Objective lens for pickup and light pickup apparatus |
JP4494686B2 (en) * | 2001-09-18 | 2010-06-30 | Hoya株式会社 | Objective lens for optical head and optical head using the same |
JP2003279851A (en) * | 2002-03-20 | 2003-10-02 | Matsushita Electric Ind Co Ltd | Single lens having high numerical aperture, optical head device using the same and optical information recording and reproducing device |
JP2003337281A (en) * | 2002-05-17 | 2003-11-28 | Minolta Co Ltd | Objective lens for optical pickup |
JP2004185797A (en) * | 2002-11-21 | 2004-07-02 | Konica Minolta Holdings Inc | Optical system for optical pickup device, optical pickup device, and objective lens |
JP4433818B2 (en) * | 2003-02-14 | 2010-03-17 | コニカミノルタホールディングス株式会社 | Objective lens for optical pickup device, optical pickup device and optical information recording / reproducing device |
JP4394507B2 (en) * | 2003-04-14 | 2010-01-06 | Hoya株式会社 | Objective lens and manufacturing method thereof |
JP2005166227A (en) * | 2003-05-22 | 2005-06-23 | Konica Minolta Opto Inc | Optical pickup device, optical information recording/reproducing device, expander lens, coupling lens, and optical element for chromatic aberration correction |
JP2005025925A (en) * | 2003-06-09 | 2005-01-27 | Konica Minolta Opto Inc | Optical system, optical pickup apparatus, optical information recording and reproducing apparatus, and aberration-correcting element |
JP2005156719A (en) * | 2003-11-21 | 2005-06-16 | Konica Minolta Opto Inc | Objective lens for optical pickup device, optical pickup device, optical information recording/reproducing apparatus |
JP2006155839A (en) * | 2004-12-01 | 2006-06-15 | Canon Inc | Optical pickup driving device, optical component, and object driving mechanism |
-
2010
- 2010-05-07 JP JP2010107433A patent/JP5005066B2/en active Active
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