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1.发明授权公开(公告)号：US07729227B2
公开(公告)日：2010-06-01
申请号：US11344558
申请日：2006-02-01
申请人： Takatoshi Minoda , Noriaki Seki , Eizo Ono
发明人： Takatoshi Minoda , Noriaki Seki , Eizo Ono
IPC分类号： G11B7/00
CPC分类号： G02B27/42 , G02B27/4238 , G02B27/4261 , G02B27/4277 , G02B27/4294 , G11B7/1275 , G11B7/1353 , G11B2007/0006
摘要： There is provided a diffractive element including a first member 2, which includes a first resin 2a and has a predetermined refractive index, and a second member 3, which has the same refractive index as the first member 2 having the predetermined refractive index in one wavelength of light and has a refractive index different from the first member 2 having the predetermined refractive index in the other wavelength of light. The first member 2 and the second member 3 are alternately arranged within an incidence plane of the two wavelengths of light, thereby constituting a diffraction grating. The second member 3 includes a second resin 3a to dissolve an organic matter 5 having optical absorption in a predetermined wavelength range at a molecular level, whereby the refractive index of the second member 3 is formed.
摘要翻译： 提供了包括第一构件2的衍射元件，第一构件2包括具有预定折射率的第一树脂2a和具有与在一个波长中具有预定折射率的第一构件2相同的折射率的第二构件3 并且具有与在另一波长的光中具有预定折射率的第一构件2不同的折射率。 第一构件2和第二构件3交替地布置在两个波长的光的入射平面内，从而构成衍射光栅。 第二构件3包括第二树脂3a，以在分子水平上溶解在预定波长范围内具有光吸收的有机物质5，从而形成第二构件3的折射率。
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2.发明申请公开(公告)号：US20060176559A1
公开(公告)日：2006-08-10
申请号：US11344558
申请日：2006-02-01
申请人： Takatoshi Minoda , Noriaki Seki , Eizo Ono
发明人： Takatoshi Minoda , Noriaki Seki , Eizo Ono
CPC分类号： G02B27/42 , G02B27/4238 , G02B27/4261 , G02B27/4277 , G02B27/4294 , G11B7/1275 , G11B7/1353 , G11B2007/0006
摘要： There is provided a diffractive element including a first member 2, which includes a first resin 2a and has a predetermined refractive index, and a second member 3, which has the same refractive index as the first member 2 having the predetermined refractive index in one wavelength of light and has a refractive index different from the first member 2 having the predetermined refractive index in the other wavelength of light. The first member 2 and the second member 3 are alternately arranged within an incidence plane of the two wavelengths of light, thereby constituting a diffraction grating. The second member 3 includes a second resin 3a to dissolve an organic matter 5 having optical absorption in a predetermined wavelength range at a molecular level, whereby the refractive index of the second member 3 is formed.
摘要翻译： 提供了一种衍射元件，其包括第一构件2，第一构件2包括具有预定折射率的第一树脂2a和与第一构件2具有预定折射率的折射率相同的折射率的第二构件3 光的波长，并且在另一波长的光中具有与具有预定折射率的第一构件2不同的折射率。 第一构件2和第二构件3交替地布置在两个波长的光的入射平面内，从而构成衍射光栅。 第二构件3包括第二树脂3a，以在分子水平上溶解在预定波长范围内具有光吸收的有机物质5，从而形成第二构件3的折射率。
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公开(公告)号：US20090040910A1
公开(公告)日：2009-02-12
申请号：US12187900
申请日：2008-08-07
CPC分类号： G11B7/1275 , G11B7/0909 , G11B7/131 , G11B7/1362 , G11B2007/0006
摘要： A light source emits light with a first wavelength and light with a second wavelength longer than the first wavelength toward an optical disk from adjacent positions. An optical receiver detects light reflected from the optical disk. An astigmatism-generating element generates light used for focus control in a condition where a focusing position on one of two perpendicular cross sections including an optical axis of the light reflected from the optical disk is located ahead of the optical receiver and a focusing position on the other cross section is located behind the optical receiver are included. The astigmatism-generating element is a Fresnel mirror configured to include a plurality of reflecting mirrors. A level difference between the reflecting mirrors adjacent to each other is distributed in a range from a depth of substantially (natural number/2) times the first wavelength to (natural number/2) times the second wavelength
摘要翻译： 光源将第一波长的光和比第一波长长的第二波长的光从相邻的位置发射到光盘。 光接收器检测从光盘反射的光。 散光产生元件产生用于聚焦控制的光，其中包括从光盘反射的光的光轴的两个垂直横截面之一上的聚焦位置位于光接收器之前的聚焦位置和 其他横截面位于光接收器后面。 散光产生元件是被配置为包括多个反射镜的菲涅耳镜。 彼此相邻的反射镜之间的电平差分布在从第一波长的大致（自然数/ 2）倍到第二波长的（自然数/ 2）倍的深度的范围内
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公开(公告)号：US08270265B2
公开(公告)日：2012-09-18
申请号：US12187167
申请日：2008-08-06
IPC分类号： G11B7/00
CPC分类号： G11B7/0909 , G11B7/131 , G11B7/1356 , G11B7/1362 , G11B2007/0006
摘要： An optical pickup device or an optical disk device includes: a light source 11 that emits a laser beam toward an optical disk 25; an optical receiver 18 that detects light reflected from the optical disk 25; and an astigmatism-generating element 31 that generates light used for focus control in a condition where a focusing position on one of two perpendicular cross sections including an optical axis of the light reflected from the optical disk 25 is located ahead of the optical receiver 18 and a focusing position on the other cross section is located behind the optical receiver 18. The astigmatism-generating element 31 is a Fresnel mirror 31a configured to include a plurality of reflecting mirrors, and an imaginary surface 31d that connects the tips of the reflecting mirrors is curved in a concave shape toward a light incidence side.
摘要翻译： 光拾取装置或光盘装置包括：朝向光盘25发射激光束的光源11; 检测从光盘25反射的光的光接收器18; 以及产生用于聚焦控制的光的像散生成元件31，其中在包括从光盘25反射的光的光轴的两个垂直横截面中的一个垂直截面上的聚焦位置位于光接收器18的前方， 在另一横截面上的聚焦位置位于光接收器18的后面。像散生成元件31是被配置为包括多个反射镜的菲涅尔镜31a，并且连接反射镜的前端的虚拟表面31d 弯曲成朝向光入射侧的凹形。
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公开(公告)号：US20090040893A1
公开(公告)日：2009-02-12
申请号：US12187167
申请日：2008-08-06
IPC分类号： G11B5/58
CPC分类号： G11B7/0909 , G11B7/131 , G11B7/1356 , G11B7/1362 , G11B2007/0006
摘要： An optical pickup device or an optical disk device includes: a light source 11 that emits a laser beam toward an optical disk 25; an optical receiver 18 that detects light reflected from the optical disk 25; and an astigmatism-generating element 31 that generates light used for focus control in a condition where a focusing position on one of two perpendicular cross sections including an optical axis of the light reflected from the optical disk 25 is located ahead of the optical receiver 18 and a focusing position on the other cross section is located behind the optical receiver 18. The astigmatism-generating element is a Fresnel mirror 31a configured to include a plurality of reflecting mirrors, and an imaginary surface 31d that connects the tips of the reflecting mirrors is curved in a concave shape toward a light incidence side.
摘要翻译： 光拾取装置或光盘装置包括：朝向光盘25发射激光束的光源11; 检测从光盘25反射的光的光接收器18; 以及产生用于聚焦控制的光的像散生成元件31，其中在包括从光盘25反射的光的光轴的两个垂直横截面中的一个垂直截面上的聚焦位置位于光接收器18的前方， 在另一横截面上的聚焦位置位于光接收器18的后面。散光产生元件是被配置为包括多个反射镜的菲涅耳镜31a，并且连接反射镜的末端的假想表面31d是弯曲的 朝向光入射侧呈凹形。
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公开(公告)号：US07889620B2
公开(公告)日：2011-02-15
申请号：US12187900
申请日：2008-08-07
IPC分类号： G11B7/00
CPC分类号： G11B7/1275 , G11B7/0909 , G11B7/131 , G11B7/1362 , G11B2007/0006
摘要： A light source emits light with a first wavelength and light with a second wavelength longer than the first wavelength toward an optical disk from adjacent positions. An optical receiver detects light reflected from the optical disk. An astigmatism-generating element generates light used for focus control in a condition where a focusing position on one of two perpendicular cross sections including an optical axis of the light reflected from the optical disk is located ahead of the optical receiver and a focusing position on the other cross section is located behind the optical receiver are included. The astigmatism-generating element is a Fresnel mirror configured to include a plurality of reflecting mirrors. A level difference between the reflecting mirrors adjacent to each other is distributed in a range from a depth of substantially (natural number/2) times the first wavelength to (natural number/2) times the second wavelength.
摘要翻译： 光源将第一波长的光和比第一波长长的第二波长的光从相邻的位置发射到光盘。 光接收器检测从光盘反射的光。 散光产生元件产生用于聚焦控制的光，其中在包括从光盘反射的光的光轴的两个垂直横截面之一上的聚焦位置位于光接收器之前的聚焦位置和 其他横截面位于光接收器后面。 散光产生元件是被配置为包括多个反射镜的菲涅耳镜。 彼此相邻的反射镜之间的电平差分布在从第一波长的大致（自然数/ 2）倍到第二波长的（自然数/ 2）倍的范围内。
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公开(公告)号：US07738347B2
公开(公告)日：2010-06-15
申请号：US11850536
申请日：2007-09-05
申请人： Mayumi Tsukamoto , Masaharu Fukakusa , Hiroshi Sato , Eizo Ono
发明人： Mayumi Tsukamoto , Masaharu Fukakusa , Hiroshi Sato , Eizo Ono
IPC分类号： G11B7/00
CPC分类号： G11B7/1378 , G11B7/0909 , G11B2007/0006 , G11B2007/13722
摘要： An optical pickup device includes: a laser source for emitting, to an optical disk, a laser beam having a wavelength λ1 and a laser beam having a wavelength λ2, which is longer than the wavelength λ1; a light receiver, for receiving laser beams that are reflected by the optical disk; a beam splitter, for directing, to the light receiver, the laser beams reflected by the optical disk; and an astigmatism generation element, located between the beam splitter and the light receiver, for generating the laser beams to be used for focusing control, by designating as the front of the light receiver a focal point on one of the intersecting cross sections that include the light axes of the laser beams, and by designating as the rear of the light receiver, a focal point on the other cross section, wherein the astigmatism generation element is an optical element, which is like a Fresnel lens, whose step depth is substantially a natural number times either the wavelength λ1 or the wavelength λ2.
摘要翻译： 光学拾取装置包括：激光源，用于向光盘发射波长λ1的激光束和比波长λ1长的具有波长λ2的激光束; 光接收器，用于接收由光盘反射的激光束; 分束器，用于将由光盘反射的激光束引导到光接收器; 以及位于分束器和光接收器之间的用于产生用于聚焦控制的激光束的像散生成元件，通过将光接收器的前部指定为包括 激光束的光轴，并且通过将光接收器的后部指定为另一横截面上的焦点，其中像散生成元件是像菲涅耳透镜的光学元件，其阶梯深度基本上是 自然数为波长λ1或波长λ2。
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公开(公告)号：US20060081761A1
公开(公告)日：2006-04-20
申请号：US11249766
申请日：2005-10-14
申请人： Hiroshi Tanigawa , Eizo Ono , Mitsuhiro Matsumoto , Toshihiro Koga , Masaharu Fukakusa , Jiro Mimasa , Akihiro Imayoshi , Minoru Fujita , Takeshi Fujishima
发明人： Hiroshi Tanigawa , Eizo Ono , Mitsuhiro Matsumoto , Toshihiro Koga , Masaharu Fukakusa , Jiro Mimasa , Akihiro Imayoshi , Minoru Fujita , Takeshi Fujishima
IPC分类号： G02B27/40
CPC分类号： G11B7/1275 , G11B7/1353 , G11B7/1359 , G11B7/1381 , G11B2007/0006
摘要： An optical pickup apparatus, comprises: a light source in which a plurality of light emitting points having different wavelengths are provided; a light receiving unit, receiving light reflected from an optical disk to produce an electric signal; and an optical system, collecting light emitted from the respective light emitting points to the optical disk and conducting the light reflected from the optical disk to the light receiving unit; wherein the optical system includes a filter which converts the light emitted from the respective light emitting points into a predetermined optical intensity distribution.
摘要翻译： 一种光拾取装置，包括：其中设置有多个不同波长的发光点的光源; 光接收单元，接收从光盘反射的光以产生电信号; 以及光学系统，将从各个发光点发射的光收集到光盘并将从光盘反射的光传导到光接收单元; 其中所述光学系统包括将从各个发光点发射的光转换成预定光强度分布的滤光器。
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