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公开(公告)号：EP1158502A3
公开(公告)日：2003-04-16
申请号：EP00311584.7
申请日：2000-12-21
IPC分类号： G11B7/135
CPC分类号： G11B7/1353 , G11B7/127 , G11B7/1374 , G11B7/1378 , G11B7/13922 , G11B2007/0006
摘要： An objective lens device (20) includes an aspherical lens element (21) facing a disk (10) and having a predetermined first focal distance and a predetermined numerical aperture, and a holographic lens (22) installed adjacent to the aspherical lens element (21) and having a second focal distance longer than that of the first focal distance and having a diffraction lattice for compensating for chromatism due to a change in wavelength of laser light having a wavelength of 670 nm or less. Thus, during the shift between recoding and reproduction of a DVD or an HD-DVD, the change in wavelength due to the change in power of the laser light and aberration according to the change can be effectively corrected. Also, since the objective lens device (10) is formed of one aspherical lens element (21) and one holographic lens element (22), the material for each of the lens elements (21, 22) can be easily selected and also the structure of the optical pickup device adopting the objective lens device (20) according to the present invention can be simplified.
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公开(公告)号：EP1096483A3
公开(公告)日：2003-04-23
申请号：EP00309141.0
申请日：2000-10-17
CPC分类号： G11B7/1376 , G11B7/13922
摘要： An optical pickup capable of effectively reducing chromatic aberration is provided. In the optical pickup, a collimating lens (103) including a diverging lens (103b) with diverging power and a focusing lens (103a) with focusing power is arranged on the optical path between a light source (104) and an objective lens (101), wherein assuming that the total focal distance of the collimating lens is f and the focal distance of the diverging lens is fn, the collimating lens satisfies the relationship -1.5 > f/fn. The optical pickup is compatible with both existing digital versatile disks (DVDs), and high-definition (HD)-DVDs, which are not standardized yet, but need a blue light source near 405nm and an objective lens having a numerical aperture of 0.6 or more.
摘要翻译： 提供能够有效地减小色差的光学拾取器。 在光学拾取器中，包括具有发散光焦度的发散透镜（103b）和具有聚焦光焦度的聚焦透镜（103a）的准直透镜（103）被布置在光源（104）和物镜（101）之间的光路上 ），其中假设准直透镜的总焦距是f并且发散透镜的焦距是fn，则准直透镜满足关系-1.5> f / fn。 该光学头兼容现有的数字多功能盘（DVD）和高清晰度（HD）-DVD，它们尚未标准化，但需要405nm附近的蓝光源和数值孔径为0.6的物镜或 更多。
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公开(公告)号：EP1096483B1
公开(公告)日：2006-03-15
申请号：EP00309141.0
申请日：2000-10-17
CPC分类号： G11B7/1376 , G11B7/13922
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4.发明授权Compatible optical pickup for high-density recording/reproduction 有权兼容式光学Abtasvorrichtung用于记录和再现高密度
公开(公告)号：EP1130581B1
公开(公告)日：2005-03-16
申请号：EP01300155.7
申请日：2001-01-09
CPC分类号： G11B7/13922 , G11B7/005 , G11B7/1395 , G11B2007/0006
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5.发明公开Compatible optical pickup for high-density recording/reproduction 有权兼容的选择AbtasvorrichtungfürAufnahme und Wiedergabe mit hohen Dichte
公开(公告)号：EP1130581A3
公开(公告)日：2003-04-02
申请号：EP01300155.7
申请日：2001-01-09
CPC分类号： G11B7/13922 , G11B7/005 , G11B7/1395 , G11B2007/0006
摘要： An optical pickup for high-density recording/ reproduction, which is compatible for optical discs having different formats, is provided. The optical pickup adopts a single objective lens (17) and is able to correct for chromatic aberration caused by use of light sources having different wavelengths, and/or spherical aberration caused by thickness difference between optical discs. The optical pickup includes a first light source (11) for emitting a beam suitable for a first optical disc (10) with a first format; a second light source (21) for emitting a beam suitable for a second optical disc (21) with another format; and an objective lens (17) designed to be suitable for the first optical disc and the wavelength of the beam emitted from the first light source (11). In particular, as the optical system for the second optical disc (21), the optical pickup includes: a first light source (11) suitable for a first format optical disc; a second light source (21) suitable for a second format optical disc; and an objective lens designed to be suitable for the first format optical disc and the wavelength of beam emitted from the first light source. As an optical system for the second format optical disc, the optical pickup includes: a first light splitting unit (25) arranged on the optical path between the second light source (21) and a second optical path changing unit (23), for splitting the incident beam into at least two beams including first and second beams to be focused as a main light spot and a sub-light spot, respectively, on a corresponding optical disc; a second photodetector (29) having first and second light receiving portions (29a, 29b), for receiving the first and second beams reflected from the corresponding optical disc; and a second signal processing unit (30) for processing the signals output from the first and second light receiving portions (29a, 29b) of the second photodetector (29) to correct for chromatic aberration caused by difference in the wavelengths of the beams emitted from the first and second light sources (11, 20) and/or spherical aberration caused by thickness difference between the first and second format optical discs, thereby detecting a reproduction signal of the second format optical disc.
摘要翻译： 提供了用于高密度记录/再现的光学拾取器，其与具有不同格式的光盘兼容。 光学拾取器采用单个物镜（17），并且能够校正由于使用具有不同波长的光源和/或由光盘之间的厚度差引起的球面像差引起的色差。 光拾取器包括用于以第一格式发射适合于第一光盘（10）的光束的第一光源（11） 用于以另一格式发射适合于第二光盘（21）的光束的第二光源（21） 以及被设计为适于第一光盘的物镜和从第一光源（11）发射的光束的波长。 特别地，作为第二光盘（21）的光学系统，光拾取器包括：适合于第一格式光盘的第一光源（11） 适合于第二格式光盘的第二光源（21）; 以及被设计为适合于第一格式光盘和从第一光源发射的光束的波长的物镜。 作为第二格式光盘的光学系统，光拾取器包括：布置在第二光源（21）和第二光路改变单元（23）之间的光路上的第一分光单元（25），用于分割 所述入射光束分别进入至少两束，所述至少两束光束分别包括第一和第二光束，以分别作为主光点和副光点聚焦在相应的光盘上; 具有第一和第二光接收部分（29a，29b）的第二光电检测器（29），用于接收从对应的光盘反射的第一和第二光束; 以及第二信号处理单元（30），用于处理从第二光电检测器（29）的第一和第二光接收部分（29a，29b）输出的信号，以校正由第二光接收器（29）发射的光束的波长差异引起的色差 第一和第二光源（11,20）和/或由第一和第二格式光盘之间的厚度差引起的球面像差，从而检测第二格式光盘的再现信号。
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6.发明公开Objective lens and optical pickup device adopting the same 有权Objektivlinse und damitausgerüsteteoptische Abtastvorrichtung
公开(公告)号：EP1158502A2
公开(公告)日：2001-11-28
申请号：EP00311584.7
申请日：2000-12-21
IPC分类号： G11B7/135
CPC分类号： G11B7/1353 , G11B7/127 , G11B7/1374 , G11B7/1378 , G11B7/13922 , G11B2007/0006
摘要： An objective lens device (20) includes an aspherical lens element (21) facing a disk (10) and having a predetermined first focal distance and a predetermined numerical aperture, and a holographic lens (22) installed adjacent to the aspherical lens element (21) and having a second focal distance longer than that of the first focal distance and having a diffraction lattice for compensating for chromatism due to a change in wavelength of laser light having a wavelength of 670 nm or less. Thus, during the shift between recoding and reproduction of a DVD or an HD-DVD, the change in wavelength due to the change in power of the laser light and aberration according to the change can be effectively corrected. Also, since the objective lens device (10) is formed of one aspherical lens element (21) and one holographic lens element (22), the material for each of the lens elements (21, 22) can be easily selected and also the structure of the optical pickup device adopting the objective lens device (20) according to the present invention can be simplified.
摘要翻译： 物镜装置（20）包括面对盘（10）并且具有预定的第一焦距和预定数值孔径的非球面透镜元件（21）和与非球面透镜元件（21）相邻安装的全息透镜 ），并且具有比第一焦距的第二焦距更长的第二焦距，并且具有用于补偿由于波长为670nm或更小的激光的波长变化引起的色差的衍射光栅。 因此，在DVD或HD-DVD的再编码和再现之间的移动期间，可以有效地校正由于激光的功率的变化引起的波长的变化和根据变化的像差。 此外，由于物镜装置（10）由一个非球面透镜元件（21）和一个全息透镜元件（22）形成，所以可以容易地选择每个透镜元件（21,22）的材料， 可以简化采用本发明的物镜装置（20）的光拾取装置。
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公开(公告)号：EP1158502B1
公开(公告)日：2005-04-20
申请号：EP00311584.7
申请日：2000-12-21
IPC分类号： G11B7/135
CPC分类号： G11B7/1353 , G11B7/127 , G11B7/1374 , G11B7/1378 , G11B7/13922 , G11B2007/0006
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公开(公告)号：EP1117096B1
公开(公告)日：2004-03-03
申请号：EP00307764.1
申请日：2000-09-08
IPC分类号： G11B7/135
CPC分类号： G11B7/1374 , G11B7/0037 , G11B7/1275 , G11B2007/0006 , G11B2007/13727
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9.发明公开Compatible optical pickup for high-density recording/reproduction 有权兼容式光学Abtasvorrichtung用于记录和再现高密度
公开(公告)号：EP1130581A2
公开(公告)日：2001-09-05
申请号：EP01300155.7
申请日：2001-01-09
CPC分类号： G11B7/13922 , G11B7/005 , G11B7/1395 , G11B2007/0006
摘要： An optical pickup for high-density recording/ reproduction, which is compatible for optical discs having different formats, is provided. The optical pickup adopts a single objective lens (17) and is able to correct for chromatic aberration caused by use of light sources having different wavelengths, and/or spherical aberration caused by thickness difference between optical discs. The optical pickup includes a first light source (11) for emitting a beam suitable for a first optical disc (10) with a first format; a second light source (21) for emitting a beam suitable for a second optical disc (21) with another format; and an objective lens (17) designed to be suitable for the first optical disc and the wavelength of the beam emitted from the first light source (11). In particular, as the optical system for the second optical disc (21), the optical pickup includes: a first light source (11) suitable for a first format optical disc; a second light source (21) suitable for a second format optical disc; and an objective lens designed to be suitable for the first format optical disc and the wavelength of beam emitted from the first light source. As an optical system for the second format optical disc, the optical pickup includes: a first light splitting unit (25) arranged on the optical path between the second light source (21) and a second optical path changing unit (23), for splitting the incident beam into at least two beams including first and second beams to be focused as a main light spot and a sub-light spot, respectively, on a corresponding optical disc; a second photodetector (29) having first and second light receiving portions (29a, 29b), for receiving the first and second beams reflected from the corresponding optical disc; and a second signal processing unit (30) for processing the signals output from the first and second light receiving portions (29a, 29b) of the second photodetector (29) to correct for chromatic aberration caused by difference in the wavelengths of the beams emitted from the first and second light sources (11, 20) and/or spherical aberration caused by thickness difference between the first and second format optical discs, thereby detecting a reproduction signal of the second format optical disc.
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公开(公告)号：EP1096483A2
公开(公告)日：2001-05-02
申请号：EP00309141.0
申请日：2000-10-17
IPC分类号： G11B7/135
CPC分类号： G11B7/1376 , G11B7/13922
摘要： An optical pickup capable of effectively reducing chromatic aberration is provided. In the optical pickup, a collimating lens (103) including a diverging lens (103b) with diverging power and a focusing lens (103a) with focusing power is arranged on the optical path between a light source (104) and an objective lens (101), wherein assuming that the total focal distance of the collimating lens is f and the focal distance of the diverging lens is fn, the collimating lens satisfies the relationship -1.5 > f/fn . The optical pickup is compatible with both existing digital versatile disks (DVDs), and high-definition (HD)-DVDs, which are not standardized yet, but need a blue light source near 405nm and an objective lens having a numerical aperture of 0.6 or more.
摘要翻译： 提供了能够有效地降低色差的光学拾取器。 在光拾取器中，在光源（104）和物镜（101）之间的光路上配置有具有发散光焦度的发散透镜（103b）和具有聚焦功率的聚焦透镜（103a）的准直透镜（103） ），其中假设准直透镜的总焦距为f，发散透镜的焦距为fn，准直透镜满足关系-1.5> f / fn。 光拾取器与现有的数字多功能盘（DVD）和尚未标准化但需要405nm附近的蓝色光源的数字通用盘（DVD）和数字孔径为0.6的物镜兼容， 更多。
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