公开(公告)号：US6016293A

公开(公告)日：2000-01-18

申请号：US797697

申请日：1997-02-11

Applicant: Chul-woo Lee ,  Chong-sam Chung ,  Jang-hoon Yoo

Inventor： Chul-woo Lee ,  Chong-sam Chung ,  Jang-hoon Yoo

IPC: G11B7/004 ,  G11B7/00 ,  G11B7/0037 ,  G11B7/085 ,  G11B7/09 ,  G11B7/125 ,  G11B7/13 ,  G11B19/12

CPC classification number: G11B19/12 ,  G11B7/0037 ,  G11B7/131 ,  G11B2007/0006 ,  G11B2007/13727 ,  G11B7/0908

Abstract: A disc discriminating method and an objective lens adopting the same, in which fast disc type discrimination and stable reproduction signal generation is performed. The method includes the steps of increasing and decreasing a focus voltage applied to an actuator of an objective lens facing a disc having an information-recorded plane to move the objective lens in a standby state at a neutral position to a focus position corresponding to the disc, detecting a movement distance value of the objectiveness from a focus signal applied to the actuator when the objective lens moves to the focus position, comparing the movement distance value with a reference value and determining the disc to be a thick disc if the movement distance value is greater than the reference value, and determining the disc to be a thin disc if the movement distance value is less than the reference value.

Abstract translation: 一种光盘鉴别方法及采用该光盘鉴别方法的物镜，其中执行快盘类型识别和稳定再现信号产生。 该方法包括以下步骤：增加和减少施加到面向具有信息记录平面的盘的物镜的致动器的聚焦电压，以将处于中性位置的待机状态的物镜移动到对应于光盘的对焦位置 当物镜移动到对焦位置时，从施加到致动器的聚焦信号检测出物体的移动距离值，将移动距离值与参考值进行比较，并且如果移动距离值 大于参考值，并且如果移动距离值小于参考值，则将盘确定为薄盘。

公开(公告)号：US5699339A

公开(公告)日：1997-12-16

申请号：US508253

申请日：1995-07-27

Applicant: Chul-woo Lee ,  Chong-sam Chung ,  Jang-hoon Yoo ,  Kyung-hwa Rim

Inventor： Chul-woo Lee ,  Chong-sam Chung ,  Jang-hoon Yoo ,  Kyung-hwa Rim

IPC: G11B7/08 ,  G11B7/09 ,  G11B7/135 ,  G11B7/00

CPC classification number: G11B7/1356 ,  G11B7/0908 ,  G11B7/0917 ,  G11B7/094 ,  G11B2007/0919

Abstract: In detecting a focus error for an optical pickup, an inverse image generator for generating inverse images onto a light beam reflected from an optical disk is used in a focus error detecting method and apparatus thereof. The inverse image generator is composed of a semi-transmissive plane for splitting a light beam into first and second light beams, first and second prisms for inverting the phase of the second light beam, and third and fourth prisms for synthesizing the phase-inverted second light beam with the first light beam. Also, the inverse image generator has two quadrant wave plates, a polarization plane and light synthesizing plane for preventing a light loss. Since the errors due to an optical axis variation is eliminated from the focus error signal detected from the synthetic light beam radiated by the inverse generator, the optical pickup can be driven with stability.

Abstract translation: 在检测光拾取器的聚焦误差时，在聚焦误差检测方法及其装置中使用用于在从光盘反射的光束上产生反转图像的逆图像发生器。 逆图像生成器由用于将光束分割为第一和第二光束的半透射平面，用于反转第二光束的相位的第一和第二棱镜以及用于合成相位反转的第二棱镜的第三和第四棱镜 光束与第一光束。 此外，逆图像生成器具有两个象限波片，一个用于防止光损失的偏振面和光合成平面。 由于从由逆发生器辐射的合成光束检测到的聚焦误差信号中消除了由于光轴变化引起的误差，所以可以稳定地驱动光学拾取器。

公开(公告)号：US08503272B2

公开(公告)日：2013-08-06

申请号：US10225177

申请日：2002-08-22

Applicant: Chul-woo Lee ,  Jang-hoon Yoo

Inventor： Chul-woo Lee ,  Jang-hoon Yoo

IPC: G11B15/02

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.

公开(公告)号：US08384786B2

公开(公告)日：2013-02-26

申请号：US12942332

申请日：2010-11-09

Applicant: Liefeng Zhao ,  Jang-hoon Yoo

Inventor： Liefeng Zhao ,  Jang-hoon Yoo

IPC: H04N5/228 ,  G03B17/00

CPC classification number: G03B17/00 ,  H04N5/23248 ,  H04N5/23258 ,  H04N5/23287

Abstract: A method of compensating for vibration and an imaging apparatus are provided. The method of compensating for vibration includes determining whether a vibration compensation starting condition is satisfied, and starting compensating for vibration prior to operating a shutter, if the vibration compensation starting condition is satisfied. Accordingly, a shutter lag is reduced and power consumption is reduced, and accuracy of vibration compensation is improved.

Abstract translation: 提供了补偿振动的方法和成像装置。 补偿振动的方法包括确定是否满足振动补偿启动条件，以及如果满足振动补偿启动条件，则开始补偿操作闸板之前的振动。 因此，快门滞后减少，功耗降低，振动补偿的精度提高。

公开(公告)号：US08199413B2

公开(公告)日：2012-06-12

申请号：US12877247

申请日：2010-09-08

Applicant: Seok-bong Kang ,  Jang-hoon Yoo

Inventor： Seok-bong Kang ,  Jang-hoon Yoo

IPC: G02B15/14

CPC classification number: G02B15/173

Abstract: A zoom optical system including a first lens group including a plastic aspherical lens and having a negative refractive power, a second lens group having a positive refractive power, and a third lens group having a positive refractive power, wherein the first lens group, the second lens group and the third lens group are arrange sequentially from an object side to an image side, and wherein the plastic aspherical lens satisfies the following Inequality: 0≦(R21−R22)2≦0.04, where R21 denotes the radius of curvature of the plastic aspherical lens corresponding to the object side, and R22 denotes the radius of curvature of the plastic aspherical lens corresponding to the image side.

Abstract translation: 一种变焦光学系统，包括：包括塑料非球面透镜并具有负折光力的第一透镜组，具有正折光力的第二透镜组和具有正折光力的第三透镜组，其中所述第一透镜组，所述第二透镜组 透镜组和第三透镜组从物体侧到像侧依次排列，并且其中塑料非球面透镜满足以下不等式：0＆nlE;（R21-R22）2＆nlE; 0.04，其中R21表示 对应于物体侧的塑料非球面透镜，R22表示与图像侧对应的塑料非球面透镜的曲率半径。

公开(公告)号：US20110063737A1

公开(公告)日：2011-03-17

申请号：US12877247

申请日：2010-09-08

Applicant: Seok-bong Kang ,  Jang-hoon Yoo

Inventor： Seok-bong Kang ,  Jang-hoon Yoo

IPC: G02B15/14

CPC classification number: G02B15/173

Abstract: A zoom optical system including a first lens group including a plastic aspherical lens and having a negative refractive power, a second lens group having a positive refractive power, and a third lens group having a positive refractive power, wherein the first lens group, the second lens group and the third lens group are arrange sequentially from an object side to an image side, and wherein the plastic aspherical lens satisfies the following Inequality: 0≦(R21−R22)2≦0.04, where R21 denotes the radius of curvature of the plastic aspherical lens corresponding to the object side, and R22 denotes the radius of curvature of the plastic aspherical lens corresponding to the image side.

Abstract translation: 一种变焦光学系统，包括：包括塑料非球面透镜并具有负折光力的第一透镜组，具有正折光力的第二透镜组和具有正折光力的第三透镜组，其中所述第一透镜组，所述第二透镜组 透镜组和第三透镜组从物体侧到像侧依次排列，并且其中塑料非球面透镜满足以下不等式：0＆nlE;（R21-R22）2＆nlE; 0.04，其中R21表示 对应于物体侧的塑料非球面透镜，R22表示与图像侧对应的塑料非球面透镜的曲率半径。

公开(公告)号：US07885165B2

公开(公告)日：2011-02-08

申请号：US11332243

申请日：2006-01-17

Applicant: Soo-han Park ,  Jang-hoon Yoo ,  Hag-hyeon Jang ,  Yong-han Yoon ,  Soo-jin Jung

Inventor： Soo-han Park ,  Jang-hoon Yoo ,  Hag-hyeon Jang ,  Yong-han Yoon ,  Soo-jin Jung

IPC: G11B7/12

CPC classification number: G11B7/1275 ,  G11B7/1353 ,  G11B7/1376 ,  G11B7/1378 ,  G11B7/13922 ,  G11B7/13925 ,  G11B2007/0006 ,  G11B2007/0013 ,  G11B2007/13727

Abstract: An optical pickup device according to an embodiment of the present invention comprises a light source for projecting a beam of light to record and reproduce information with respect to an optical recording medium. A collimating lens is disposed on a path of the light to converge and convert the light into a parallel beam. An object lens condenses the parallel beam from the collimating lens and projects the parallel beam onto the optical recording medium. An optical element is disposed between the collimating lens and the object lens. A first actuator moves the collimating lens along the optical axis to thereby control a distance between the collimating lens and the optical element. A first controller drives the first actuator to find a position for the collimating lens, for reducing aberration generated in the light being projected to the optical recording medium. Accordingly, the aberration can be effectively prevented, thereby improving recording and reproducing performance of the optical pickup device.

Abstract translation: 根据本发明的实施例的光学拾取装置包括用于投射光束以记录和再现关于光学记录介质的信息的光源。 准直透镜设置在光的路径上以会聚并将光转换成平行光束。 物镜将来自准直透镜的平行光束会聚并将平行光束投影到光记录介质上。 光学元件设置在准直透镜和物镜之间。 第一致动器沿着光轴移动准直透镜，从而控制准直透镜和光学元件之间的距离。 第一控制器驱动第一致动器以找到用于准直透镜的位置，用于减少投射到光记录介质的光中产生的像差。 因此，可以有效地防止像差，从而提高光拾取装置的记录和再现性能。

公开(公告)号：US20080074757A1

公开(公告)日：2008-03-27

申请号：US11748753

申请日：2007-05-15

Applicant: Jang-hoon Yoo ,  Dong-ho Shin ,  Soo-han Park

Inventor： Jang-hoon Yoo ,  Dong-ho Shin ,  Soo-han Park

IPC: G02B3/10 ,  G11B7/00

CPC classification number: G02B27/0037 ,  G02B27/4238 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/13922

Abstract: An object lens arranged on a light proceeding path to focus light on a recording medium includes a first surface that is an incident surface on which light is incident, a second surface from which light exits to be focused on the recording medium, and a diffractive optical element disposed on at least one of the first and second surfaces and which has a refractivity of fD/f

Abstract translation: 布置在光行进路径上以将光聚焦在记录介质上的物镜包括作为光入射的入射表面的第一表面，光从其出射以聚焦在记录介质上的第二表面，以及衍射光学 元件设置在所述第一表面和所述第二表面中的至少一个表面上，并且具有作为所述衍射光学元件的焦距的f D D / f <5的折射率 f是物镜的焦距。 物镜的数值孔径为0.75以上。

公开(公告)号：US07200098B2

公开(公告)日：2007-04-03

申请号：US11091449

申请日：2005-03-29

Applicant: Jang-hoon Yoo ,  Kun-ho Cho ,  Seung-tae Jung ,  Chul-woo Lee ,  Dong-ho Shin

Inventor： Jang-hoon Yoo ,  Kun-ho Cho ,  Seung-tae Jung ,  Chul-woo Lee ,  Dong-ho Shin

IPC: G11B7/00

CPC classification number: G11B7/13927 ,  G11B7/1362 ,  G11B7/1374 ,  G11B7/1378 ,  G11B2007/13725

Abstract: An optical pickup includes a light source emitting a laser beam and an optical path changing unit altering a traveling path of an incident beam. An objective lens, disposed on an optical path between the optical path changing unit and an optical disk, focuses the incident beam from the light source to form a light spot on the optical disk of the objective lens. The optical pickup further includes a photodetector and an detecting-correcting unit, arranged on the optical path between the optical path changing unit and the objective lens, performing at least one of detecting the thickness of the optical disk and correcting aberration caused by thickness variations of the optical disk. The objective lens includes a first transmitting portion divergently transmitting an incident beam, where the first transmitting portion is at a relatively near-axis region from an optical axis of the objective lens. A second transmitting portion transmits the incident beam, where the second transmitting portion is arranged facing the first transmitting portion. A first reflecting portion condenses and reflects the incident beam from the first transmitting portion, where the first reflecting portion is formed around the second transmitting portion. A second reflecting portion condenses and reflects the incident beam from the first reflecting portion towards the second transmitting portion, where the second reflecting portion is formed around the first transmitting portion.

Abstract translation: 光拾取器包括发射激光束的光源和改变入射光束的行进路径的光路改变单元。 设置在光路改变单元和光盘之间的光路上的物镜聚焦来自光源的入射光束，以在物镜的光盘上形成光斑。 光学拾取器还包括光电检测器和检测校正单元，其布置在光路改变单元和物镜之间的光路上，执行检测光盘的厚度和校正由厚度变化引起的像差中的至少一个 光盘。 物镜包括发射入射光束的第一透射部分，其中第一透射部分处于距离物镜的光轴的相对近轴的区域。 第二发送部分透射入射光束，其中第二透射部分布置成面对第一透射部分。 第一反射部分将来自第一透射部分的入射光束冷凝并反射，其中第一反射部分围绕第二透射部分形成。 第二反射部分将来自第一反射部分的入射光束聚集并反射到第二透射部分，其中第二反射部分围绕第一透射部分形成。

公开(公告)号：US20070053274A1

公开(公告)日：2007-03-08

申请号：US11514253

申请日：2006-09-01

Applicant: Jang-hoon Yoo ,  Soo-han Park ,  Young-man Ahn ,  Tae-kyung Kim ,  Yong-han Yoon ,  Young-sun Jeon

Inventor： Jang-hoon Yoo ,  Soo-han Park ,  Young-man Ahn ,  Tae-kyung Kim ,  Yong-han Yoon ,  Young-sun Jeon

IPC: G11B7/135

CPC classification number: G11B7/1369 ,  G11B7/1353 ,  G11B7/1365 ,  G11B7/139 ,  G11B2007/0006

Abstract: An optical pickup and an optical recording and/or reproducing apparatus include a light source which emits light having a first wavelength, an objective lens that focuses incident light on an information storage medium and is optimized for a first information storage medium of a predetermined standard, a polarization changer which changes the light with the first wavelength incident from the light source into light beams with first and second polarizations that are orthogonal to each other, a polarization hologram element which has a varying refractive power according to the polarization of the light with the first wavelength that passes through the polarization changer, a photodetector which receives light after the light has been emitted from the light source, focused on the information storage medium by the objective lens, and reflected by the information storage medium, and an optical path changer which guides the light reflected by the information storage medium toward the photodetector, wherein the optical pickup can compatibly adopt the first information storage medium and a second information storage medium which has a different thickness from the first information storage medium.

Abstract translation: 光学拾取器和光学记录和/或再现装置包括发射具有第一波长的光的光源，将入射光聚焦在信息存储介质上并针对预定标准的第一信息存储介质进行了优化的物镜， 将从光源入射的第一波长的光改变为具有彼此正交的第一和第二偏振光束的偏振光改变器，根据光的偏振具有变化的屈光力的偏振全息元件 通过偏振光变换器的第一波长，从光源发光后接收光的光电检测器，由物镜聚焦在信息存储介质上，并由信息存储介质反射;以及光路改变器， 将由信息存储介质反射的光引向光电二极管 检测器，其中所述光学拾取器可兼容地采用所述第一信息存储介质和与所述第一信息存储介质具有不同厚度的第二信息存储介质。