公开(公告)号：US08891342B2

公开(公告)日：2014-11-18

申请号：US14362865

申请日：2012-10-11

Applicant: Hironori Nakahara ,  Toshiya Matozaki ,  Nobuo Takeshita

Inventor： Hironori Nakahara ,  Toshiya Matozaki ,  Nobuo Takeshita

IPC: G11B7/00 ,  G11B7/13 ,  G11B7/09 ,  G11B7/1353

CPC classification number: G11B7/1353 ,  G11B7/0901 ,  G11B2007/0013

Abstract: An optical component, a hologram, and a photodetector are configured in an optical head device of an optical disc device such that a +1-order beam or a −1-order beam of diffracted light generated from light reflected from an information track in the intended information recording layer strikes the interior of the light-receiving surfaces of the tracking error detection light-receiving sections, a +1-order beam or a −1-order beam of diffracted light generated from light reflected from an information track in an information recording layer one layer deeper than the intended information recording layer strikes outside the light-receiving sections, and a +1-order beam or a −1-order beam of diffracted light that is generated from light reflected from an information track in an information recording layer one layer shallower than the intended information recording layer strikes outside the light-receiving sections.

Abstract translation: 光学元件，全息图和光电检测器被配置在光盘装置的光学头装置中，使得从在光盘装置中的信息轨道反射的光产生的+ 1级光束或-1级衍射光束 目标信息记录层撞击跟踪误差检测光接收部分的光接收表面的内部，从信息中的信息轨迹反射的光产生的+ 1级光束或-1级衍射光束 比预期的信息记录层更深一层的记录层撞击光接收部分外部，以及从信息记录中从信息轨道反射的光产生的+1级光束或-1级衍射光束 比预期的信息记录层浅的层1撞击光接收部分。

公开(公告)号：US20140313874A1

公开(公告)日：2014-10-23

申请号：US14362865

申请日：2012-10-11

Applicant: Mitsubishi Electric Corporation

Inventor： Hironori Nakahara ,  Toshiya Matozaki ,  Nobuo Takeshita

IPC: G11B7/1353

CPC classification number: G11B7/1353 ,  G11B7/0901 ,  G11B2007/0013

Abstract: An optical component, a hologram, and a photodetector are configured in an optical head device of an optical disc device such that a +1-order beam or a −1-order beam of diffracted light generated from light reflected from an information track in the intended information recording layer strikes the interior of the light-receiving surfaces of the tracking error detection light-receiving sections, a +1-order beam or a −1-order beam of diffracted light generated from light reflected from an information track in an information recording layer one layer deeper than the intended information recording layer strikes outside the light-receiving sections, and a +1-order beam or a −1-order beam of diffracted light that is generated from light reflected from an information track in an information recording layer one layer shallower than the intended information recording layer strikes outside the light-receiving sections.

Abstract translation: 光学元件，全息图和光电检测器被配置在光盘装置的光学头装置中，使得从在光盘装置中的信息轨道反射的光产生的+ 1级光束或-1级衍射光束 目标信息记录层撞击跟踪误差检测光接收部分的光接收表面的内部，从信息中的信息轨迹反射的光产生的+ 1级光束或-1级衍射光束 比预期的信息记录层更深一层的记录层撞击光接收部分外部，以及从信息记录中从信息轨道反射的光产生的+1级光束或-1级衍射光束 比预期的信息记录层浅的层1撞击光接收部分。

公开(公告)号：US20140293766A1

公开(公告)日：2014-10-02

申请号：US14306797

申请日：2014-06-17

Applicant: Panasonic Corporation

Inventor： Kazuhiro MINAMI

IPC: G11B7/1353

CPC classification number: G11B7/1353 ,  G11B7/1367 ,  G11B7/1374 ,  G11B2007/0006

Abstract: An optical element having compatibility among two or more wavelengths and having an excellent converging performance for light with each wavelength, and an optical head apparatus using the optical element are provided. An optical element according to the present disclosure has a first region including an optical axis and a second region formed around the outer circumference of the first region. The first region and the second region respectively have a first diffraction structure and a second diffraction structure each cyclically formed on an aspheric surface and having a step-like cross section. In the first region, the number of steps included between top portions of the first diffraction structure is different from the number of steps included between the optical axis and a top portion that is closest to the optical axis in the first diffraction structure.

Abstract translation: 具有两个或更多个波长之间具有兼容性并对每个波长的光具有优异的会聚性能的光学元件以及使用该光学元件的光学头装置。 根据本公开的光学元件具有包括光轴的第一区域和围绕第一区域的外圆周形成的第二区域。 第一区域和第二区域分别具有第一衍射结构和第二衍射结构，每个衍射结构和第二衍射结构循环地形成在非球面上并且具有阶梯状横截面。 在第一区域中，包括在第一衍射结构的顶部之间的台阶数与在第一衍射结构中最靠近光轴的光轴和顶部之间包括的台阶数不同。

公开(公告)号：US08848502B2

公开(公告)日：2014-09-30

申请号：US10441111

申请日：2003-05-20

Applicant: Chul-woo Lee ,  Jang-hoon Yoo

Inventor： Chul-woo Lee ,  Jang-hoon Yoo

IPC: G11B7/135 ,  G11B7/1353 ,  G11B7/1392 ,  G11B7/1374 ,  G11B7/1372 ,  G11B7/00

CPC classification number: G11B7/1374 ,  G11B7/1353 ,  G11B7/13922 ,  G11B2007/0006 ,  G11B2007/13727

Abstract: A recording/reproducing apparatus having an optical pickup device which is efficient in light use having little spherical aberration. The recording and/or reproducing apparatus includes an optical pickup having an objective lens, disposed opposite a disk, having a light passing region divided into central, intermediate and periphery regions corresponding to a near axis area, an intermediate axis area and a far axis area of incident light, where the curvature of the central and peripheral regions is optimized for a thin disk and that of the intermediate region is optimized for a thick disk, a light source irradiating light toward a disk through the objective lens; a photo detector for detecting light reflected from the disk, and a beam splitter, disposed between the objective lens and the light source, for transmitting light from the light source toward the objective lens and for diffracting light reflected from the disks toward the photo detector; and a processing unit to process an information signal to control the incident light generated by the light source, and to process the detected light from the photodetector. Therefore, the optical pickup device can be used for both compact disks (CDs) that are thick using light beam passing the near and intermediate regions of said objective lens, and digital video disks (DVDs) that are thin using light beam passing the near and far axis regions of said objective lens, and detect signals without picking up noise regardless of the thickness of the disk.

Abstract translation: 一种具有光学拾取装置的记录/再现装置，其具有很少的球面像差的光利用效率。 记录和/或再现装置包括具有与光盘相对设置的物镜的光学拾取器，具有被分成对应于近轴区域的中心，中间和周边区域的光通过区域，中间轴区域和远轴区域 入射光的中心区域和外围区域的曲率优化为薄盘，中间区域的曲率针对厚盘优化，光源通过物镜向盘照射光; 用于检测从光盘反射的光的光检测器和设置在物镜和光源之间的光束分离器，用于将光从光源向物镜透射，并将从光盘反射的光衍射到光检测器; 以及处理单元，处理信息信号以控制由光源产生的入射光，并处理来自光电检测器的检测光。 因此，光拾取装置可以用于使用通过所述物镜的近中和中间区域的光束而使用厚度的光盘（CD），以及使用经过近距离的光束的薄的数字视盘（DVD） 所述物镜的远轴区域，无论盘的厚度如何，都可以检测信号而不拾取噪声。

公开(公告)号：US08750083B2

公开(公告)日：2014-06-10

申请号：US13095624

申请日：2011-04-27

Applicant: Minoru Sato ,  Kiyotaka Eizumi ,  Shuichi Ichiura

Inventor： Minoru Sato ,  Kiyotaka Eizumi ,  Shuichi Ichiura

IPC: G11B7/1353 ,  G11B7/12

CPC classification number: G11B7/1353 ,  G11B7/123 ,  G11B7/1275 ,  G11B2007/0006

Abstract: An optical pickup apparatus includes at least: a light emitting element capable of emitting at least first wavelength light and second wavelength light; and a diffraction grating configured to split the first wavelength light into at least a first main beam and a first sub-beam and to split the second wavelength light into at least a second main beam and a second sub-beam, a following expression (1) being satisfied: 1.05

Abstract translation: 光拾取装置至少包括：能够发射至少第一波长光和第二波长光的发光元件; 以及衍射光栅，其被配置为将所述第一波长光分成至少第一主光束和第一子光束，并将所述第二波长光分裂成至少第二主光束和第二子光束，所述表达式（1 ）满足：1.05

公开(公告)号：US08687277B2

公开(公告)日：2014-04-01

申请号：US13198512

申请日：2011-08-04

Applicant: Kenneth C. Johnson

Inventor： Kenneth C. Johnson

IPC: G02B27/44 ,  G02B5/18 ,  G11B7/1353

CPC classification number: G11B7/1353 ,  G02B26/0808

Abstract: A “Stacked-Grating Light Modulator” (“SGLM”) comprises two diffraction grating elements, a reflection grating and a transmission grating, in close parallel proximity. An incident beam transmits through the transmission grating and is reflected by the reflection grating back through the transmission grating. The relative lateral position of the two gratings is varied to modulate the beam's zero-order reflectance.

Abstract translation: “堆叠光栅调制器”（“SGLM”）包括两个衍射光栅元件，反射光栅和透射光栅，并联接近。 入射光束通过透射光栅传播并被反射光栅反射回透射光栅。 改变两个光栅的相对横向位置以调制光束的零级反射率。

公开(公告)号：US20130094338A1

公开(公告)日：2013-04-18

申请号：US13645758

申请日：2012-10-05

Applicant: PANASONIC CORPORATION

Inventor： Yohichi SAITOH ,  Jun-ichi ASADA ,  Kazuo MOMOO ,  Hideki HAYASHI

IPC: G11B7/1353 ,  G11B20/00

CPC classification number: G11B7/00458 ,  G11B7/003 ,  G11B7/1353 ,  G11B7/14

Abstract: An optical pickup includes: a light source; a first diffractive element which diffracts light polarized in a particular direction; an objective lens; a lens actuator which shifts the objective lens so that the magnitude of shift from its initial position in a tracking direction has an upper limit of 0.3 mm to 0.6 mm; a wave plate; a second diffractive element which has two diffraction regions configured to diffract light polarized in a direction that intersects with the particular direction at right angles and which splits the write beam reflected from the optical storage medium through each diffraction region into a transmitted light beam and at least one diffracted light beam; and a photodetector which detects the transmitted light beam, the diffracted light beams that have left the two diffraction regions, and the read beam reflected from the optical storage medium.

Abstract translation: 光拾取器包括：光源; 衍射沿特定方向偏振的第一衍射元件; 物镜; 透镜致动器，其移动物镜，使得从跟踪方向上的初始位置的偏移量的大小为0.3mm至0.6mm的上限; 波片; 具有两个衍射区域的第二衍射元件，所述衍射区域被配置为沿与所述特定方向成直角相交的方向衍射光，并且将从所述光学存储介质反射的写入光束通过每个衍射区域分裂成透射光束，并且至少 一个衍射光束; 以及检测透射光束，已经离开两个衍射区域的衍射光束和从光学存储介质反射的读取光束的光电检测器。

公开(公告)号：US20130051205A1

公开(公告)日：2013-02-28

申请号：US13398934

申请日：2012-02-17

Applicant: Jun-ichi ASADA ,  Kazuo MOMOO ,  Yohichi SAITOH

Inventor： Jun-ichi ASADA ,  Kazuo MOMOO ,  Yohichi SAITOH

IPC: G11B7/1353 ,  G11B7/1263

CPC classification number: G11B7/00458 ,  G11B7/003 ,  G11B7/1353

Abstract: In one embodiment of the present invention, an optical pickup for writing and reading data on an optical storage medium comprises a diffractive element for diffracting a light beam to split it into multiple light beams. The diffracted light beams includes a zero-order diffracted light beam for writing data on a track of the land or the groove of the optical storage medium and non-zero-order diffracted light beams for reading the data from the track. The diffractive element has first and second diffraction gratings that have mutually different grating vector directions and pitches. The first diffraction grating forms light beam spots on the same track by the non-zero-order and zero-order diffracted light beams. The second diffraction grating forms a light beam spot to extend to both sides of said track, or forms a light beam spot on one side of said track, by the non-zero-order diffracted light beams.

Abstract translation: 在本发明的一个实施例中，用于在光学存储介质上写入和读取数据的光学拾取器包括用于衍射光束以将其分成多个光束的衍射元件。 衍射光束包括用于在光存储介质的焊盘或凹槽的轨道上写入数据的零级衍射光束和用于从轨道读取数据的非零级衍射光束。 衍射元件具有第一和第二衍射光栅，其具有相互不同的光栅矢量方向和间距。 第一衍射光栅通过非零级和零级衍射光束在同一轨道上形成光束点。 第二衍射光栅形成光束点，以延伸到所述轨道的两侧，或者通过非零级衍射光束在所述轨道的一侧上形成光束点。

公开(公告)号：US20120213051A1

公开(公告)日：2012-08-23

申请号：US13360182

申请日：2012-01-27

Applicant: Yi CHIU ,  Hsi-Fu Shih ,  Chen-An Lin

Inventor： Yi CHIU ,  Hsi-Fu Shih ,  Chen-An Lin

IPC: G11B7/12 ,  G11B7/1374 ,  G11B7/1353

CPC classification number: G11B7/1362 ,  G11B7/123 ,  G11B7/1353

Abstract: An optical pickup head is provided, which includes a silicon substrate, in which an aperture and an objective lens are disposed on the silicon substrate; and a laser diode (LD), a 135-degree tilted reflector, and a 135-degree tilted holographic reflector are disposed on the silicon substrate. The two 135-degree tilted reflectors and a holographic optical element (HOE) are fabricated on a slant face structure of an optical platform using a semiconductor process, so all the elements are disposed at a straight zone, and then in combination with bonding of the LD and an optical sensor element, an miniaturization objective is achieved and an optical path is shortened.

Abstract translation: 提供一种光拾取头，其包括硅衬底，其中孔和物镜设置在硅衬底上; 并且在硅衬底上设置激光二极管（LD），135度倾斜反射器和135度倾斜全息反射器。 使用半导体工艺在两个135度倾斜反射器和全息光学元件（HOE）上制造在光学平台的倾斜面结构上，因此所有元件都设置在直线区域，然后与 LD和光学传感器元件，实现了小型化的目的，缩短了光路。

公开(公告)号：US20120151508A1

公开(公告)日：2012-06-14

申请号：US13391483

申请日：2010-07-30

Applicant: Yoshiaki Komma ,  Joji Anzai ,  Yasumori Hino ,  Kousei Sano ,  Hideki Nakata ,  Keisuke Fujimoto ,  Takeharu Yamamoto ,  Takeshi Shimamoto

Inventor： Yoshiaki Komma ,  Joji Anzai ,  Yasumori Hino ,  Kousei Sano ,  Hideki Nakata ,  Keisuke Fujimoto ,  Takeharu Yamamoto ,  Takeshi Shimamoto

IPC: G11B7/1374 ,  G11B17/028 ,  G11B7/1353

CPC classification number: G11B7/1381 ,  G11B7/1275 ,  G11B2007/0006 ,  G11B2007/0013

Abstract: When information is recorded or reproduced on or from an optical information medium having three or more recording layers using blue light, interference by another layer light is reduced and, when information is reproduced from an optical information medium using red light, an S/N ratio is held excellently high.An optical head device includes a first laser light source (1) which emits blue light, a second laser light source (2) which emits red light, an objective lens (11) which focuses the blue light onto a recording layer of a first optical disc (12) or focuses the red light onto a recording layer of a second optical disc (13), a photodetector (9) which receives the blue light reflected by the recording layer of the first optical disc (12) or the red light reflected by the recording layer of the second optical disc (13) and outputs an electric signal in accordance with an amount of the received blue light or red light, and a wavelength selective light blocking region (7x) which blocks a predetermined range of the blue light including an optical axis thereof to prevent the predetermined range from reaching the photodetector (9), and transmits the red light.

Abstract translation: 当使用蓝光在具有三个或更多个记录层的光信息介质上记录或再现信息时，减少了另一层光的干扰，并且当使用红光从光信息介质再现信息时，S / N比 举办得非常高。 光头装置包括发射蓝光的第一激光光源（1），发出红光的第二激光光源（2），将蓝光聚焦到第一光学记录层上的物镜（11） 盘（12）或将红光聚焦到第二光盘（13）的记录层上，接收由第一光盘（12）的记录层反射的蓝光的光电检测器（9）或反射的红光 通过第二光盘（13）的记录层，并根据所接收的蓝光或红光的量输出电信号，以及阻挡蓝光的预定范围的波长选择性遮光区域（7x） 包括其光轴以防止预定范围到达光电检测器（9），并发送红光。