公开(公告)号：US20080181085A1

公开(公告)日：2008-07-31

申请号：US12052359

申请日：2008-03-20

申请人： Tohru Kimura ,  Katsuya Sakamoto ,  Yuichi Atarashi

发明人： Tohru Kimura ,  Katsuya Sakamoto ,  Yuichi Atarashi

IPC分类号： G11B7/135

CPC分类号： G11B7/1374 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/139 ,  G11B7/13925 ,  G11B2007/0006 ,  G11B2007/13727

摘要： A hybrid objective lens has a refractive lens and a diffractive optical element constructed by plural coaxial ring-shaped zones on at least one optical surface thereof. When n1, n2 and n3 each is a diffraction order of a diffracted ray having a maximum light amount among diffracted rays of each of first, second and third light flux having wavelength λ1, λ2 and λ3 when respective light flux comes to be incident into the diffractive structure respectively, the following formulas are satisfied: |n1|>|n2|, and |n1>|n3|, and the hybrid objective lens converges a n1-th, n2-th and n3-th order diffracted ray of the first, second and third light flux onto an information recording plane of each of the first, second ant third optical information recording medium respectively so as to form an appropriate wavefront within respective prescribed necessary image side numerical apertures.

摘要翻译： 混合物镜具有在其至少一个光学表面上由多个同轴环形区域构成的折射透镜和衍射光学元件。 当n 1，n 2和n 3各自是当各个光束来到时具有波长λ1，λ2和λ3的第一，第二和第三光束中的每一个的衍射光线中具有最大光量的衍射光线的衍射级数 要分别入射到衍射结构中，满足下列公式：<？in-line-formula description =“In-line formula”end =“lead”？> | n 1 |> | n 2 |和| n 1> | n 3 |和<？in-line-formula description =“In-line Formulas”end =“tail”？>混合物镜会聚第n1，第n2和第n3阶衍射光线 分别在第一，第二蚂蚁第三光学信息记录介质的信息记录面上分别形成第一，第二和第三光束，以便在相应的规定的必需像侧数值孔内形成适当的波前。

公开(公告)号：US07319655B2

公开(公告)日：2008-01-15

申请号：US11002411

申请日：2004-12-02

申请人： Tohru Kimura

发明人： Tohru Kimura

IPC分类号： G11B7/00

CPC分类号： G11B7/1353 ,  G11B7/1369 ,  G11B7/139 ,  G11B7/13922 ,  G11B2007/0006

摘要： A diffractive optical element, comprises a first diffractive structure to generate n11-th order diffracted ray when a first light flux having λ1 (nm) of a wavelength comes in and to generate n21-th order diffracted ray (n11.≧n21) when a second light flux having λ2 (nm) (λ2>λ1) comes in; and a second diffractive structure to generate n12-th order diffracted ray when the first light flux comes in and to generate n22-th order diffracted ray (n12.≧n22) when the second light comes in. The diffractive optical element satisfies the following formula: δφA12≠δφB12, where δφA12={n11·λ1/(N11−1)}/{n21·λ2/(N21−1)}, and δφB12={n12·λ1/(N12−1)}/{n22·λ2/(N22−1)}, wherein N11, N21 are refractive index of the first diffractive structure respectively for λ1 and λ2, and N12, N22 are refractive index of the second diffractive structure respectively for λ1 and λ2.

摘要翻译： 衍射光学元件包括当波长λ1（nm）的第一光通量进入并产生n 21阶衍射光以产生n 1/11阶衍射光的第一衍射结构， 当λ2（nm）（λ2>​​λ1）的第二光束进入时，/ SUB>衍射光线（n> 11）= n 21 以及第二衍射结构，用于当第一光通量进入时产生n 12阶衍射光，并产生n 22衍射光线（n _{12 = n 22）当衍射光学元件满足以下公式时：衍生物A12 其中，deltaphi A12 =（n-11-1）/（N-11-1） （N 21-21）}，并且deltaphi B12 = { （N-12-1）} / {n 22 N 2 N 2 N 2 N 2 N 2 N 2 N 2 N /（N 22 -I）}，其中N 11，N 21是分别为第一衍射结构的折射率 对于λ1和λ2，N 12，N 22分别是第二衍射结构的折射率 对于λ1和λ2。}

公开(公告)号：US20070258144A1

公开(公告)日：2007-11-08

申请号：US11679204

申请日：2007-02-27

申请人： Tohru Kimura ,  Katsuya Sakamoto ,  Yuichi Atarashi

发明人： Tohru Kimura ,  Katsuya Sakamoto ,  Yuichi Atarashi

IPC分类号： G02B27/44

CPC分类号： G11B7/1374 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/139 ,  G11B7/13925 ,  G11B2007/0006 ,  G11B2007/13727

摘要： A hybrid objective lens has a refractive lens and a diffractive optical element constructed by plural coaxial ring-shaped zones on at least one optical surface thereof. When n1, n2 and n3 each is a diffraction order of a diffracted ray having a maximum light amount among diffracted rays of each of first, second and third light flux having wavelength λ1, λ2 and λ3 when respective light flux comes to be incident into the diffractive structure respectively, the following formulas are satisfied: |n1|>|n2|, and |n1|>|n3|, and the hybrid objective lens converges a n1-th, n2-th and n3-th order diffracted ray of the first, second and third light flux onto an information recording plane of each of the first, second ant third optical information recording medium respectively so as to form an appropriate wavefront within respective prescribed necessary image side numerical apertures.

摘要翻译： 混合物镜具有在其至少一个光学表面上由多个同轴环形区域构成的折射透镜和衍射光学元件。 当n 1，n 2和n 3各自是当各个光束来到时具有波长λ1，λ2和λ3的第一，第二和第三光束中的每一个的衍射光线中具有最大光量的衍射光线的衍射级数 要分别入射到衍射结构中，满足下列公式：<？in-line-formula description =“In-line formula”end =“lead”？> | n 1 |> | n 2 |和| n 1 |> | n 3 |和<？in-line-formula description =“In-line Formulas”end =“tail”？>混合物镜会聚第1，第2和第3 分别将第一，第二和第三光束的次级衍射光线分别放置到第一，第二蚂蚁第三光学信息记录介质中的每一个的信息记录平面上，以便在各个规定的必要图像侧数值孔径内形成适当的波前。

公开(公告)号：US07164645B2

公开(公告)日：2007-01-16

申请号：US10692353

申请日：2003-10-23

申请人： Tohru Kimura

发明人： Tohru Kimura

IPC分类号： G11B7/135 ,  G11B7/00

CPC分类号： G11B7/1378 ,  G11B7/1392

摘要： An optical system has an expander lens and an objective lens. The following formula is satisfied: W1CM>W2CM, where W1CM is a coma aberration (λrms) of a converged light spot when an off-axial light flux of a wavelength λ (nm) emitted so as to converge at a distance position from the optical axis comes into the objective lens, and W2CM is a coma aberration (λrms) of a converged spot when an off-axial light flux of the wavelength λ (nm) emitted so as to converge at the distant position distant comes through the expander lens into the objective lens on a condition that the optical axis of the expander lens is arranged so as to conform with the optical axis of the objective lens.

摘要翻译： 光学系统具有扩展器透镜和物镜。 满足以下公式：W1＆lt; CM＆lt; / SUB＆gt; W2＆lt; CM＆lt; CM＆lt; CM＆lt;＆lt;＆lt; CM＆lt; 以距离光轴的距离位置会聚的发射波长λ（nm）的非轴向光通量进入物镜，并且W2 CM是彗形像差（lambdarms） 当扩张器透镜的光轴被布置成如下的条件，当远离远处发射的波长λ（nm）的离轴光通量通过扩展器透镜进入物镜时会聚点 以符合物镜的光轴。

公开(公告)号：US20060203692A1

公开(公告)日：2006-09-14

申请号：US11366546

申请日：2006-03-03

申请人： Kohei Ota ,  Nobuyoshi Mori ,  Junji Hashimura ,  Tohru Kimura ,  Kiyono Ikenaka ,  Katsuya Sakamoto ,  Eiji Nomura

发明人： Kohei Ota ,  Nobuyoshi Mori ,  Junji Hashimura ,  Tohru Kimura ,  Kiyono Ikenaka ,  Katsuya Sakamoto ,  Eiji Nomura

IPC分类号： G11B7/00

CPC分类号： G11B7/1367 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/13922 ,  G11B2007/0006

摘要： An optical pickup apparatus includes: a first light source for emitting a first light flux; a second light source for emitting a second light flux; a third light source for emitting a third light flux; and an objective optical unit having a first optical path difference providing structure and a second optical path difference providing structure. Magnifications of the objective optical unit for the first-third light fluxes have almost same value. The first optical path difference providing structure provides a predefined optical path difference and changes a spherical aberration to be one of under-correction and over-correction for all of the first light flux, the second light flux, and the third light flux. The second optical path difference providing structure provides a predefined optical path difference and changes a spherical aberration to be the other of under-correction and over-correction of the spherical aberration only for the second light flux.

摘要翻译： 一种光学拾取装置包括：用于发射第一光通量的第一光源; 用于发射第二光通量的第二光源; 用于发射第三光通量的第三光源; 以及具有第一光程差提供结构和第二光程差提供结构的物镜光学单元。 用于第一至第三光束的物镜光学单元的放大率具有几乎相同的值。 第一光程差提供结构提供预定的光程差，并且将球面像差改变为对于所有第一光通量，第二光通量和第三光通量的校正和过校正之一。 第二光程差提供结构提供预定的光程差，并且将球面像差改变为仅用于第二光通量的球面像差的校正不足和过校正。

公开(公告)号：US20060181744A1

公开(公告)日：2006-08-17

申请号：US11350833

申请日：2006-02-10

申请人： Fumio Nagai ,  Tohru Kimura

发明人： Fumio Nagai ,  Tohru Kimura

IPC分类号： H04N1/29

CPC分类号： G11B7/1374 ,  G11B7/1275 ,  G11B7/1362 ,  G11B7/13922 ,  G11B2007/0006

摘要： An optical unit for an optical pickup apparatus for recording and or reproducing information onto or from the first to third optical recording media by applying the first to third light beams emitted from the first to third light sources, the optical unit comprises a mirror having dichroic mirror layer including reflecting surfaces 71a and 70a on both surfaces and an objective lens including a phase structure on the optical surface of the objective lens. The reflecting surface 71a of the mirror reflects the first to second light beams and guides them to the objective lens. Reflecting surface 70a reflects the third light beams and guides them to the objective lens. The phase structure on the objective lens corrects the spherical aberration of the first and the second light beams, and focuses the first light beams onto BD, the second beams onto DVD and the third beams onto CD.

摘要翻译： 一种用于通过施加从第一至第三光源发射的第一至第三光束将信息记录到第一至第三光学记录介质上或从第一至第三光学记录介质再现信息的光学拾取装置的光学单元，所述光学单元包括具有二向色镜 其包括两个表面上的反射表面71a和70a以及在物镜的光学表面上包括相位结构的物镜。 镜的反射面71a反射第一至第二光束并将它们引导到物镜。 反射面70a反射第三光束并将它们引导到物镜。 物镜上的相位结构校正第一和第二光束的球面像差，并将第一光束聚焦到BD上，将第二光束聚焦到DVD上，将第三光束聚焦到CD上。

公开(公告)号：US20060062103A1

公开(公告)日：2006-03-23

申请号：US11209113

申请日：2005-08-22

申请人： Kenji Ogiwara ,  Tohru Kimura

发明人： Kenji Ogiwara ,  Tohru Kimura

IPC分类号： G11B7/00

CPC分类号： G11B7/13925 ,  G11B2007/0006

摘要： An objective optical element for use in an optical pickup apparatus for recording and/or reproducing information on first—third optical information recording media using first—third light fluxes respectively, includes: a first phase structure for compensating a deterioration in a performance forming the converged spot on the information recording surface of the first optical information recording medium caused by an temperature change, a second phase structure for reducing a spherical aberration based on a thickness difference between the protective substrates of the first and second optical information media or the a wavelength difference between the first and second wavelengths, and a third phase structure for reducing a spherical aberration based on a thickness difference between the protective substrate of the first and third optical information media.

公开(公告)号：US20060039266A1

公开(公告)日：2006-02-23

申请号：US10895036

申请日：2004-07-21

申请人： Tohru Kimura ,  Nobuyoshi Mori

发明人： Tohru Kimura ,  Nobuyoshi Mori

IPC分类号： G11B7/00

CPC分类号： G11B7/1376 ,  G02B13/18 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/139 ,  G11B7/13922 ,  G11B7/13925 ,  G11B2007/0006 ,  G11B2007/0013 ,  G11B2007/13727

摘要： An objective lens for recording information on and/or reproducing information from an optical information recording medium, comprises a diffractive structure including ring-shaped diffractive zones on at least one surface thereof. The objective lens is a single lens made of plastic material, at least one surface thereof is an aspheric surface, and the following conditional formula is satisfied; NA≧0.7 where NA represents an image side numerical aperture necessary for recording on and/or reproducing from an optical information recording medium.

摘要翻译： 一种用于在光学信息记录介质上记录信息和/或再现信息的物镜包括在其至少一个表面上包括环形衍射区的衍射结构。 物镜是由塑料材料制成的单一透镜，其至少一个表面是非球面，满足以下条件式： NA> = 0.7，其中NA表示在光信息记录介质上记录和/或从光信息记录介质再现所需的像侧数值孔径。

公开(公告)号：US20050237898A1

公开(公告)日：2005-10-27

申请号：US11108639

申请日：2005-04-19

申请人： Tohru Kimura

发明人： Tohru Kimura

IPC分类号： G11B7/085 ,  G11B7/00 ,  G11B7/135

CPC分类号： G11B7/1353 ,  G11B7/1374 ,  G11B7/13922 ,  G11B2007/0006

摘要： An objective lens includes a diffraction structure for distributing much of a quantity of an incident light beam into two diffracted lights having different diffraction orders from each other, wherein recording or reproduction of information on an optical disk is performed by converging the diffracted light having a longer focal length of the two diffracted lights onto an information recording surface through a protective layer of the optical disk, and a distance from the objective lens to a surface of the protective layer along an optical axis is longer than a distance between focuses of the two diffracted lights along the optical axis when the diffracted light having the longer focal length is converged onto the information recording surface of the optical disk.

摘要翻译： 物镜包括衍射结构，用于将大量的入射光束分配成具有彼此不同衍射级的两个衍射光，其中通过会聚具有更长的衍射光的衍射光来执行光盘上的信息的记录或再现 两个衍射光的焦距通过光盘的保护层到信息记录表面上，并且沿着光轴从物镜到保护层的表面的距离长于两个衍射的焦点之间的距离 当具有较长焦距的衍射光会聚到光盘的信息记录表面上时沿着光轴的光。

公开(公告)号：US20050180294A1

公开(公告)日：2005-08-18

申请号：US11049948

申请日：2005-02-04

申请人： Tohru Kimura ,  Nobuyoshi Mori ,  Junji Hashimura ,  Yuichi Atarashi ,  Toshiyuki Kojima ,  Kiyono Ikenaka ,  Mitsuru Mimori

发明人： Tohru Kimura ,  Nobuyoshi Mori ,  Junji Hashimura ,  Yuichi Atarashi ,  Toshiyuki Kojima ,  Kiyono Ikenaka ,  Mitsuru Mimori

IPC分类号： G02B13/00 ,  G11B7/00 ,  G11B7/125 ,  G11B7/135

CPC分类号： G11B7/13925 ,  G11B7/1275 ,  G11B7/1356 ,  G11B7/1367 ,  G11B7/1369 ,  G11B7/1374 ,  G11B7/1378 ,  G11B7/13922 ,  G11B11/10532 ,  G11B2007/0006

摘要： An optical pickup apparatus comprising: a first, second and third light sources emitting first, second and third light flux having first wavelength of λ1, second wavelength of λ2 and third wavelength of λ3, respectively; and an objective optical system converging the first, second and third light fluxes onto an information recording surface of a first, second and third optical disk, respectively, wherein the objective optical system has a phase structure, and wherein when a first, second and third magnifications of the objective optical system for conducting reproducing information from and/or recording information on the first, second and third optical disks are represented by M1, M2, and M3, respectively, |dM1−M2|, which represents an absolute value of a difference between M1 and M2, satisfies the following relation. |dM1−M2|

摘要翻译： 一种光学拾取装置，包括：第一，第二和第三光源，分别发射具有λ1的第一波长，λ2的第二波长和λ3的第三波长的第一，第二和第三光束; 以及物镜光学系统，其将所述第一，第二和第三光束分别聚焦到第一，第二和第三光盘的信息记录表面上，其中所述物镜光学系统具有相位结构，并且其中当第一，第二和第三光束 用于从第一，第二和第三光盘进行再现信息和/或记录信息的物镜光学系统的放大率分别由M1，M2和M3分别表示为M1，M2和M3。 ，其表示M1和M2之间的差的绝对值，满足以下关系。 <？in-line-formula description =“In-line Formulas”end =“lead”？> | d M1-M2 <0.02 <？in-line-formula description =“In-line 公式“end =”tail“？>