公开(公告)号：US07088664B2

公开(公告)日：2006-08-08

申请号：US10078459

申请日：2002-02-21

申请人： Dae-sik Kim ,  Seung-tae Jung ,  Cheol-sung Yeon ,  Kun-ho Cho

发明人： Dae-sik Kim ,  Seung-tae Jung ,  Cheol-sung Yeon ,  Kun-ho Cho

IPC分类号： G11B7/135

CPC分类号： G11B7/1356 ,  G02B5/04 ,  G11B7/12 ,  G11B7/124

摘要： A reflection type compound prism and an optical pickup apparatus employing the same. As a light beam is passed through the compound prism, a size of the light beam in a direction perpendicular to a reference plane is reduced by a first reflection surface, propagated toward an objective lens by second and third reflection surfaces and the size restored by reflecting the light beam from a fourth reflection surface forming an angle less than 45° with respect to the reference plane so that a height of an optical system is reducible to obtain a small thin optical pickup with a desired NA. The second and third reflection surfaces are spaced apart in a direction perpendicular to the reference plane by an amount close to a diameter of the light beam at a point of incidence of the light beam with the compound prism.

公开(公告)号：US06844969B2

公开(公告)日：2005-01-18

申请号：US10073053

申请日：2002-02-12

申请人： Kun-ho Cho ,  Seung-tae Jung ,  Dae-sik Kim ,  Cheol-sung Yeon

发明人： Kun-ho Cho ,  Seung-tae Jung ,  Dae-sik Kim ,  Cheol-sung Yeon

IPC分类号： G03B21/56 ,  G03B21/60

CPC分类号： G03B21/56

摘要： A front projection type screen includes a transparent base; a diffusion member formed on one surface of the transparent base; and a retroreflection prism array formed on another surface of the transparent base. Thus, a wide angle of visibility can be secured in a horizontal direction while an angle of visibility in a vertical direction is limited to a narrow scope. Also, a wide viewing angle can be achieved and high efficiency and brightness of light may be obtained.

摘要翻译： 前投影型屏幕包括透明底座; 形成在所述透明基材的一个表面上的扩散部件; 以及形成在透明基底的另一表面上的回射棱镜阵列。 因此，可以在水平方向上确保广角度，同时将垂直方向上的可见度角度限制在窄范围内。 此外，可以实现宽视角，并且可以获得高效率和亮度的光。

公开(公告)号：US06657942B2

公开(公告)日：2003-12-02

申请号：US09778856

申请日：2001-02-08

申请人： Chul-woo Lee ,  Joong-eon Seo ,  Seung-tae Jung ,  Myong-do Ro ,  Kun-ho Cho ,  Dong-seob Jang ,  Jang-hoon Yoo ,  Dae-sik Kim

发明人： Chul-woo Lee ,  Joong-eon Seo ,  Seung-tae Jung ,  Myong-do Ro ,  Kun-ho Cho ,  Dong-seob Jang ,  Jang-hoon Yoo ,  Dae-sik Kim

IPC分类号： G11B700

CPC分类号： G11B7/1356 ,  G11B7/08576 ,  G11B7/0908 ,  G11B7/122 ,  G11B7/1362 ,  G11B7/1376 ,  G11B7/1384 ,  G11B7/24

摘要： A swing-arm type optical recording and reproducing apparatus and an optical disk applicable to the same. The optical disk includes a substrate having an information recording surface to record and reproduce an information signal, and a protective layer which is provided on the information recording surface and whose surface facing a slider is a flat even surface so that variations in a floating height of the slider can be reduced. The optical recording and reproducing apparatus further includes, an optical head having a light source provided at a swing arm to emit light of a predetermined wavelength; an optical path changing means provided in the optical path of the light emitted from the light source for changing the proceeding path of incident light; a collimating lens installed at the slider to preliminarily converge the light emitted from the light source and entering via the optical path changing means; an objective lens installed at the slider to converge the light which is emitted from the light source and enters via the optical path changing means to form an optical spot on the optical disk; and a photodetector to receive the light which is reflected from the optical disk and enters via the objective lens, the collimating lens, and the optical path changing means. The optical head detects an information signal and an error signal in order to reduce defocus due to variations in ambient temperature and variations in the wavelength of the light of the light source.

摘要翻译： 一种摆臂式光学记录和再现装置以及可应用于其的光盘。 光盘包括具有信息记录表面以记录和再现信息信号的基板，以及设置在信息记录表面上并且其面向滑块的表面是平坦均匀表面的保护层，使得浮动高度的变化 滑块可以减少。 光学记录和再现装置还包括：光头，其具有设置在摆臂处以发射预定波长的光的光源; 光路改变装置，设置在从光源发射的光的光路中，用于改变入射光的行进路径; 准直透镜，安装在滑块上，以预先会聚从光源射出的光并通过光路改变装置进入; 安装在滑块上的物镜，其会聚从光源射出的光，经由光路改变装置进入，以在光盘上形成光点; 以及光电检测器，用于接收从光盘反射并经由物镜，准直透镜和光路改变装置进入的光。 光头检测信息信号和误差信号，以便减少由于环境温度的变化和光源的光的波长变化引起的散焦。

公开(公告)号：US06619801B2

公开(公告)日：2003-09-16

申请号：US09933278

申请日：2001-08-21

申请人： Kun-ho Cho ,  Chul-woo Lee ,  Dae-sik Kim ,  Seung-tae Jung

发明人： Kun-ho Cho ,  Chul-woo Lee ,  Dae-sik Kim ,  Seung-tae Jung

IPC分类号： G03B2114

CPC分类号： G02B27/1033 ,  G02B27/1053 ,  G02B27/1086 ,  H04N5/7441 ,  H04N9/3111

摘要： A projection type image display apparatus includes a light source emitting light, a polarization device transmitting light polarized in one direction of incident light emitted from the light source, a reflection type image generating unit generating a color image from incident light and reflecting the generated color image to proceed along a path different from a path of the incident light, a light deflection device deflecting the image reflected by the image generating unit, and a projection lens unit magnifying and transmitting the image generated by the image generating unit and deflected by the light deflection device to proceed toward a screen. Thus, a full color can be realized with respect to the area of a pixel, and an efficiency in use of light and resolving power can be improved.

摘要翻译： 投影型图像显示装置包括光源发射光，偏振装置，透射从光源发射的入射光在一个方向上偏振的光;反射型图像产生单元，其从入射光产生彩色图像并反射所产生的彩色图像 沿着与入射光的路径不同的路径进行，偏转由图像生成单元反射的图像的光偏转装置，以及投影透镜单元，其放大并透射由图像生成单元生成并由光偏转而偏转的图像 设备进入屏幕。 因此，可以相对于像素的面积实现全色，并且可以提高使用光和分辨率的效率。

公开(公告)号：US07123437B2

公开(公告)日：2006-10-17

申请号：US09962313

申请日：2001-09-26

申请人： Byoung-young Bae ,  Soon-kyo Hong ,  Chul-woo Lee ,  Young-min Cheong ,  Cheol-sung Yeon ,  Seung-tae Jung

发明人： Byoung-young Bae ,  Soon-kyo Hong ,  Chul-woo Lee ,  Young-min Cheong ,  Cheol-sung Yeon ,  Seung-tae Jung

IPC分类号： G11B17/02

CPC分类号： G11B17/046 ,  G11B23/0317 ,  G11B23/0318 ,  G11B25/043

摘要： A PCMCIA card type recording apparatus includes a housing having a seating section on which a disk cartridge is seated, a disk driving section disposed in the housing to rotatably drive a recording medium in the disk cartridge seated on the seating section, a recording/reproducing unit disposed in the housing to record and reproduce data with respect to the recording medium, and a protection cover disposed at the housing to cover and protect the disk cartridge.

公开(公告)号：US06938890B2

公开(公告)日：2005-09-06

申请号：US09725879

申请日：2000-11-30

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

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

IPC分类号： G02B13/00 ,  G02B3/08 ,  G02B13/18 ,  G11B7/085 ,  G11B7/09 ,  G11B7/095 ,  G11B7/135 ,  G11B7/24 ,  G11B7/00

CPC分类号： G11B7/13927 ,  G11B7/1362 ,  G11B7/1374 ,  G11B7/1378 ,  G11B2007/13725

摘要： 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.

摘要翻译： 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：US20050169154A1

公开(公告)日：2005-08-04

申请号：US11091449

申请日：2005-03-29

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

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

IPC分类号： G02B13/00 ,  G02B3/08 ,  G02B13/18 ,  G11B7/085 ,  G11B7/09 ,  G11B7/095 ,  G11B7/135 ,  G11B7/24 ,  G11B7/00

CPC分类号： G11B7/13927 ,  G11B7/1362 ,  G11B7/1374 ,  G11B7/1378 ,  G11B2007/13725

摘要： 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.

摘要翻译： 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：US06650469B2

公开(公告)日：2003-11-18

申请号：US10074249

申请日：2002-02-14

申请人： Dae-sik Kim ,  Chul-woo Lee ,  Seung-tae Jung

发明人： Dae-sik Kim ,  Chul-woo Lee ,  Seung-tae Jung

IPC分类号： G02B2300

CPC分类号： G11B7/1374 ,  G11B7/1392

摘要： An optical pickup apparatus having an objective lens which is formed of a single lens such that the maximum slope angle of a surface of the lens is less than 55° with respect to a high NA of 0.7 or more. The objective lens can be manufactured to satisfy a condition of allowance in optical aberration and have a high NA of 0.7 or more unlike a typical objective lens formed of a single lens. Also, the optical pickup apparatus adopting the objective lens can be used for high density recording and reproduction and provide a reduced volume, a simple structure, and/or a low price. Also, since the optical pickup apparatus adopting the objective lens has a very short working distance, the first reflection surface recording method can be adopted. Accordingly, the thickness of the optical pickup apparatus can be manufactured as thin as a protective layer of a typical recording medium.

摘要翻译： 一种具有由单个透镜形成的物镜的光学拾取装置，使得透镜的表面的最大倾斜角度相对于0.7或更高的高NA小于55°。 可以制造物镜以满足光学像差允许的条件并且与单个透镜形成的典型物镜不同，具有0.7或更高的高NA。 此外，采用该物镜的光学拾取装置也可用于高密度记录和再现，并且可以减小体积，简单的结构和/或低价格。 此外，由于采用物镜的光学拾取装置具有非常短的工作距离，所以可以采用第一反射面记录方法。 因此，光学拾取装置的厚度可以被制造成像典型记录介质的保护层一样薄。

公开(公告)号：US06547398B2

公开(公告)日：2003-04-15

申请号：US09860820

申请日：2001-05-21

申请人： Kun-ho Cho ,  Seung-tae Jung ,  Jang-hoon Yoo ,  Chul-woo Lee

发明人： Kun-ho Cho ,  Seung-tae Jung ,  Jang-hoon Yoo ,  Chul-woo Lee

IPC分类号： G03B2100

CPC分类号： G03B21/005 ,  H04N9/3117 ,  H04N13/305 ,  H04N13/324 ,  H04N13/337 ,  H04N13/363

摘要： A projection-type image display apparatus having a structure adapted so that the efficiency of the use of light and resolving power thereof can be enhanced. The projection-type image display apparatus includes a light source; a color separation unit separating incident rays according to predetermined wavelengths, and directing the separated rays at different angles; a lens array dividing the rays separated by the color separation unit into predetermined pixels; a driving portion driving the lens array to change the proceeding paths of the color rays; a polarizing beam splitter changing a proceeding path of incident rays depending on a direction of polarization; a reflection-type display device producing a color image using the rays entering via the polarizing beam splitter, and reflecting the color image toward the polarizing beam splitter; and a projection lens unit magnifying and projecting an incident image onto a screen. In addition, the projection-type image display apparatus may comprise. Alternative designs include a transmission-type display device in place of the reflection-type display device and a deflector changing the proceeding paths of the individual color rays separated by the color separation unit instead of the driving portion.

摘要翻译： 一种投影型图像显示装置，其具有能够提高光的使用效率和分辨能力的结构。 投影型图像显示装置包括光源; 分离单元，根据预定波长分离入射光线，并以不同的角度引导分离的光线; 透镜阵列，将由分色单元分离的光线划分成预定的像素; 驱动所述透镜阵列以改变所述彩色光线的前进路径的驱动部; 偏振分束器根据偏振方向改变入射光线的行进路径; 反射型显示装置，使用通过偏振分束器进入的光线产生彩色图像，并将彩色图像反射向偏振分束器; 以及将投影图像放大并投影到屏幕上的投影透镜单元。 此外，投影型图像显示装置可以包括。 替代设计包括代替反射型显示装置的透射型显示装置和改变由分色单元分离的各个色光的行进路径而不是驱动部分的偏转器。

公开(公告)号：US06430139B1

公开(公告)日：2002-08-06

申请号：US09671710

申请日：2000-09-28

申请人： Jang-hoon Yoo ,  Kun-ho Cho ,  Seung-tae Jung ,  Chul-woo Lee ,  Chong-sam Chung ,  Dong-ho Shin

发明人： Jang-hoon Yoo ,  Kun-ho Cho ,  Seung-tae Jung ,  Chul-woo Lee ,  Chong-sam Chung ,  Dong-ho Shin

IPC分类号： G11B712

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

摘要： A high-density focusing objective lens having a high numerical aperture (NA), which can be easily manufactured by an existing technique, and an optical pickup using the objective lens for high-density recording. The objective lens includes a first transmitting portion placed at a relatively near-axis region from the optical axis to divergently transmit an incident light beam; a first reflecting portion to divergently reflect the incident light beam, the first reflecting portion faces the first transmitting portion; a second reflecting portion, formed at a relatively far-axis region around the first transmitting portion that focuses and reflects the light reflected from the first reflecting portion; and a second transmitting portion, formed at a relatively far-axis region around the first reflecting portion, that refracts and transmits the light beam focused by the second reflecting portion as a peripheral light beam, wherein the maximum angle &agr; between the optical axis and the peripheral light beam satisfies the condition of 30° ≦&agr;≦65°. The optical pickup further includes the previously mentioned objective lens as a second objective lens, which is optionally placed into the optical path between a first objective lens and an optical medium. As a result, the NA of the objective lens unit can be increased up to 0.85 while the working distance d2 is maintained to be 0.2 mm.

摘要翻译： 具有可以容易地通过现有技术制造的具有高数值孔径（NA）的高密度聚焦物镜和使用该物镜进行高密度记录的光学拾取器。 物镜包括放置在与光轴相对靠近轴的区域的第一透射部分，以发散入射光束; 第一反射部分，其分散地反射入射光束，第一反射部分面向第一透射部分; 第二反射部，形成在第一透射部周围的相对远轴的区域，聚焦并反射从第一反射部反射的光; 以及第二透射部，形成在所述第一反射部周围的相对远轴的区域，所述第二透射部折射并透射由所述第二反射部聚焦的光束作为周边光束，其中，所述光轴与所述第二反射部之间的最大角度α 周边光束满足30°<=α<= 65°的条件。 光拾取器还包括作为第二物镜的前述物镜，其可选地放置在第一物镜和光介质之间的光路中。 结果，物镜单元的NA可以增加到0.85，而工作距离d2保持为0.2mm。