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11. 发明授权

US06222801B1 Optical pickup using optically variable iris 有权
标题翻译：光学拾音器使用光学可变光圈
公开(公告)号：US06222801B1
公开(公告)日：2001-04-24
申请号：US09266862
申请日：1999-03-12
申请人： Jang-Hoon Yoo , Pyong-Yong Seong , Yong-Jae Lee , Tae-Kyung Kim , Yong-Ki Son
发明人： Jang-Hoon Yoo , Pyong-Yong Seong , Yong-Jae Lee , Tae-Kyung Kim , Yong-Ki Son
IPC分类号： G11B712
CPC分类号： G11B7/1398 , G11B7/127 , G11B7/131 , G11B7/1353 , G11B7/139 , G11B2007/0006
摘要： An optical pickup includes a variable iris having a numerical aperture is adjusted according to wavelength of light and can be compatibly used for discs having respectively different specifications. The optical pickup includes a plurality of laser sources respectively emitting light of different wavelengths, an objective lens for focusing the light emitted from the laser sources into an optical spot optimized to each information recording surface of the plurality of discs, at least one photo detector for detecting the light reflected from the information recording surfaces of the corresponding discs where the optical spot is focused and passed through the objective lens, an optical element for adjusting an optical path so that the light emitted from the laser sources is directed toward the objective lens and the light emitted from the objective lens is directed toward the at least one photo detector, and a variable iris coupled between the laser sources and the objective lens, selectively operating according to the wavelength. The optical pickup can be compatibly used for discs having respectively different specifications irrespective of the thicknesses of the discs. The variable iris selectively operates in the case that light of two or more wavelengths is used, to thereby provide an effect of accomplishing an optimal optical spot on the discs.
摘要翻译：光拾取器包括具有数值孔径的可变虹膜，其根据光的波长进行调整，并且可以兼容地用于分别具有不同规格的光盘。光拾取器包括分别发射不同波长的光的多个激光源，用于将从激光源发射的光聚焦到优化到多个光盘的每个信息记录表面的光点中的物镜，至少一个光检测器，用于检测从光点聚焦并通过物镜的相应盘的信息记录表面反射的光;光学元件，用于调节光路，使得从激光源发射的光朝向物镜;以及从物镜发射的光指向至少一个光电检测器，并且耦合在激光源和物镜之间的可变光圈根据波长选择性地工作。光学拾取器可以兼容地用于具有不同规格的盘，而与盘的厚度无关。在使用两个或更多个波长的光的情况下，可变光圈选择性地操作，从而提供在光盘上实现最佳光点的效果。

12. 发明授权

US07613095B2 Optical pickup apparatus 有权
标题翻译：光拾取装置
公开(公告)号：US07613095B2
公开(公告)日：2009-11-03
申请号：US11290457
申请日：2005-12-01
申请人： Bong-Gi Kim , Soo-Han Park , Young-Man Ahn , Jang-Hoon Yoo
发明人： Bong-Gi Kim , Soo-Han Park , Young-Man Ahn , Jang-Hoon Yoo
IPC分类号： G11B7/00
CPC分类号： G11B7/1356 , G11B7/123 , G11B7/1275 , G11B7/1374 , G11B7/13927 , G11B7/1395 , G11B2007/0006
摘要： An optical pickup apparatus according to an embodiment of the present invention, comprises an optical unit for projecting a plurality of wavelengths of light, the light including a celadon light, toward a recording medium and receiving the light reflected from the recording medium to thereby detect an information signal and an error signal, and a compatible objective lens for focusing a light projected from the optical unit to thereby form an optical spot on a recording surface of the recording medium and applying at least three light having different wavelength ranges to be compatibly used for both the high-density and the low-density recording mediums. Accordingly, the optical pickup apparatus is capable of compatibly employing a high-density recording medium, which uses a celadon light and is slimmer than a digital versatile disc (DVD), and at least one low-density recording medium.
摘要翻译：根据本发明实施例的光学拾取装置包括一个光学单元，用于将多个波长的光（包括青瓷光的光）投射到记录介质上，并接收从记录介质反射的光，从而检测一个信息信号和误差信号，以及用于聚焦从光学单元投影的光的兼容物镜，从而在记录介质的记录表面上形成光点，并且将至少三个具有不同波长范围的光并入，用于高密度和低密度记录介质。因此，光拾取装置能够兼容使用青瓷光的高密度记录介质，并且比数字通用盘（DVD）更薄，以及至少一种低密度记录介质。

13. 发明授权

US07016291B2 Optical recording and pickup head for digital versatile disc compatible with read-writable compact disc by adopting flat plate lens having staircase type diffraction grating structure 失效
$Optical recording and pickup head for digital versatile disc compatible with read-writable compact disc by adopting flat plate lens having staircase type diffraction grating structure$
公开(公告)号：US07016291B2
公开(公告)日：2006-03-21
申请号：US10869096
申请日：2004-06-17
申请人： Jang-Hoon Yoo , Chul-Woo Lee , Kun-Ho Cho , Pyong-Yong Seong
发明人： Jang-Hoon Yoo , Chul-Woo Lee , Kun-Ho Cho , Pyong-Yong Seong
IPC分类号： G11B7/00
CPC分类号： G11B7/1353 , G02B5/1876 , G11B7/127 , G11B7/1367 , G11B7/1374 , G11B7/1378 , G11B7/139 , G11B7/13922 , G11B2007/0006 , G11B2007/13727
摘要： An optical recording and pickup head having a flat plate lens of a staircase type diffraction grating structure is compatible with a DVD and a CD-RW. The optical recording and pickup head includes a first optical source for emitting first light having a relatively short wavelength, a second optical source for emitting second light having a relatively long wavelength, a photo detector, an objective lens for focusing the light emitted from the first and second optical sources on the information recording surfaces of the optical discs, respectively, an optical path altering unit for transferring the light emitted from the first and second optical sources to the objective lens and transferring the first and second light reflected from the information recording surfaces of the plurality of discs to the photo detector, respectively, and a flat plate lens for substantially totally transmitting the first light proceeding from the optical path altering unit to the objective lens and diffracting the second light proceeding from the optical path altering unit to the optical axis of the objective lens.

14. 发明授权

US06449237B1 Optical recording and pickup head for digital versatile disc compatible with read-writable compact disc by adopting flat plate lens having staircase type diffraction grating structure 有权
$Optical recording and pickup head for digital versatile disc compatible with read-writable compact disc by adopting flat plate lens having staircase type diffraction grating structure$
标题翻译：通过采用具有阶梯式衍射光栅结构的平板透镜，与可读写光盘兼容的数字通用光盘的光学记录和拾取头
公开(公告)号：US06449237B1
公开(公告)日：2002-09-10
申请号：US09425673
申请日：1999-10-22
申请人： Jang-Hoon Yoo , Chul-Woo Lee , Kun-Ho Cho , Pyong-Yong Seong
发明人： Jang-Hoon Yoo , Chul-Woo Lee , Kun-Ho Cho , Pyong-Yong Seong
IPC分类号： G11B700
CPC分类号： G11B7/1353 , G02B5/1876 , G11B7/1275 , G11B7/1378 , G11B7/13922 , G11B2007/0006
摘要： An optical recording and pickup head having a flat plate lens of a staircase type diffraction grating structure is compatible with a DVD and a CD-RW. The optical recording and pickup head includes a first optical source for emitting first light having a relatively short wavelength, a second optical source for emitting second light having a relatively long wavelength, a photo detector, an objective lens for focusing the light emitted from the first and second optical sources on the information recording surfaces of the optical discs, respectively, an optical path altering unit for transferring the light emitted from the first and second optical sources to the objective lens and transferring the first and second light reflected from the information recording surfaces of the plurality of discs to the photo detector, respectively, and a flat plate lens for substantially totally transmitting the first light proceeding from the optical path altering unit to the objective lens and diffracting the second light proceeding from the optical path altering unit to the optical axis of the objective lens.
摘要翻译：具有楼梯型衍射光栅结构的平板透镜的光学记录和拾取头与DVD和CD-RW兼容。光学记录和拾取头包括用于发射具有相对较短波长的第一光的第一光源，用于发射具有较长波长的第二光的第二光源，光检测器，用于将从第一光发射的光聚焦的物镜和第二光源分别设置在光盘的信息记录表面上，光路改变单元，用于将从第一和第二光源发射的光转移到物镜，并传送从信息记录表面反射的第一和第二光以及平板透镜，用于将从光路改变单元前进的第一光基本上全部透射到物镜，并将从光路改变单元行进的第二光衍射到光学检测器物镜的轴线。

15. 发明授权

US06345029B1 Optical pickup apparatus and method 有权
标题翻译：光拾取装置及方法
公开(公告)号：US06345029B1
公开(公告)日：2002-02-05
申请号：US09144648
申请日：1998-08-31
申请人： Chul-Woo Lee , Jang-Hoon Yoo
发明人： Chul-Woo Lee , Jang-Hoon Yoo
IPC分类号： G11B700
CPC分类号： G11B7/1356 , G11B7/12 , G11B7/123 , G11B7/127 , G11B7/1381 , G11B7/139 , G11B2007/0006 , G11B2007/13727
摘要： An optical pickup apparatus and method which can selectively perform optical pickup with respect to at least two types of optical disks, on which information recording surfaces are formed, having a different thickness. The optical pickup apparatus includes an optical path alteration unit for altering a path of a light beam so that the light beam emitted from each light source proceeds toward the disk, a numerical aperture adjustment unit, including an annular shielding region which is disposed concentrically about an optical path axis between the optical path alteration unit and the disk supporter, for providing different numerical apertures according to a characteristic of a light beam to be incident; and an objective lens for respectively focusing the light beams having passed through the numerical aperture adjustment unit on the information recording surfaces of the disks to form a beam spot. Accordingly, the apparatus provides a relatively simple structure thereby reducing fabricating cost.
摘要翻译：一种光拾取装置和方法，可以选择性地对形成有不同厚度的信息记录表面的至少两种类型的光盘执行光学拾取。光拾取装置包括光路改变单元，用于改变光束的路径，使得从每个光源发射的光束朝向盘移动;数值孔径调节单元，包括环形屏蔽区域，该环形屏蔽区域围绕光路改变单元和光盘支架之间的光路轴，用于根据入射光束的特性提供不同的数值孔径; 以及用于将经过数值孔径调节单元的光束分别聚焦在盘的信息记录表面上以形成束斑的物镜。因此，该装置提供了相对简单的结构，从而降低了制造成本。

16. 发明授权

US6009066A Optical pickup of two different wavelength laser sources with an objective lens having an annular shielding region 有权
标题翻译：具有环形屏蔽区域的物镜的两个不同波长激光源的光学拾取器
公开(公告)号：US6009066A
公开(公告)日：1999-12-28
申请号：US196355
申请日：1998-11-19
申请人： Jang-Hoon Yoo , Chul-Woo Lee
发明人： Jang-Hoon Yoo , Chul-Woo Lee
IPC分类号： G11B7/135 , G11B7/00 , G11B7/09 , G11B7/12 , G11B7/125 , G11B7/13
CPC分类号： G11B7/13925 , G11B7/123 , G11B7/133 , G11B7/1356 , G11B2007/0006
摘要： An optical pickup compatible with at least two types of optical recording media using light beams having respectively different wavelengths for recording and reproducing information. In the optical pickup, a first laser light source emits a light beam having a relatively shorter wavelength. A first photodetector detects a reflected light beam with respect to the relatively shorter wavelength. An objective lens forms an annular shielding region between a near axis region of a relatively smaller radius and a far axis region of a relatively larger radius. A laser unit emits a light beam having a relatively longer wavelength, and detects only a light beam passing though the near axis region in the objective lens among reflected light beams having the relatively longer wavelength. A plurality of beam splitters directs the light beams emitted from the first laser light source and the laser unit to the objective lens, and directs the light beam reflected from each of the optical recording media to a corresponding one of the first photodetector and the laser unit. The optical pickup of the present invention has compatibility with respect to disks regardless of the thicknesses and various aspects of the disks, and can detect a good signal. Also, the optical pickup is manufactured and mass-produced at a low cost.
摘要翻译：一种与至少两种类型的光学记录介质兼容的光学拾取器，其使用具有不同波长的光束来记录和再现信息。在光学拾取器中，第一激光光源发射具有相对较短波长的光束。第一光电检测器相对于相对较短的波长检测反射光束。物镜在相对较小半径的近轴区域和较大半径的远轴区域之间形成环形屏蔽区域。激光单元发射具有相对更长波长的光束，并且仅在具有相对较长波长的反射光束中仅检测通过物镜中的近轴区域的光束。多个分束器将从第一激光光源和激光单元发射的光束引导到物镜，并将从每个光记录介质反射的光束引导到第一光电检测器和激光单元中的相应一个。本发明的光拾取器与盘的厚度和各个方面无关，而是兼容于磁盘，并且可以检测出良好的信号。而且，以低成本制造和批量生产光学拾取器。

17. 发明申请

US20050018584A1 Optical recording and pickup head for digital versatile disc compatible with read-writable compact disc by adopting flat plate lens having staircase type diffraction grating structure 失效
$Optical recording and pickup head for digital versatile disc compatible with read-writable compact disc by adopting flat plate lens having staircase type diffraction grating structure$
标题翻译：通过采用具有阶梯式衍射光栅结构的平板透镜，与可读写光盘兼容的数字通用光盘的光学记录和拾取头
公开(公告)号：US20050018584A1
公开(公告)日：2005-01-27
申请号：US10869096
申请日：2004-06-17
申请人： Jang-Hoon Yoo , Chul-Woo Lee , Kun-Ho Cho , Pyong-Yong Seong
发明人： Jang-Hoon Yoo , Chul-Woo Lee , Kun-Ho Cho , Pyong-Yong Seong
IPC分类号： G02B5/18 , G11B7/00 , G11B7/125 , G11B7/135
CPC分类号： G11B7/1353 , G02B5/1876 , G11B7/127 , G11B7/1367 , G11B7/1374 , G11B7/1378 , G11B7/139 , G11B7/13922 , G11B2007/0006 , G11B2007/13727
摘要： An optical recording and pickup head having a flat plate lens of a staircase type diffraction grating structure is compatible with a DVD and a CD-RW. The optical recording and pickup head includes a first optical source for emitting first light having a relatively short wavelength, a second optical source for emitting second light having a relatively long wavelength, a photo detector, an objective lens for focusing the light emitted from the first and second optical sources on the information recording surfaces of the optical discs, respectively, an optical path altering unit for transferring the light emitted from the first and second optical sources to the objective lens and transferring the first and second light reflected from the information recording surfaces of the plurality of discs to the photo detector, respectively, and a flat plate lens for substantially totally transmitting the first light proceeding from the optical path altering unit to the objective lens and diffracting the second light proceeding from the optical path altering unit to the optical axis of the objective lens.
摘要翻译：具有楼梯型衍射光栅结构的平板透镜的光学记录和拾取头与DVD和CD-RW兼容。光学记录和拾取头包括用于发射具有较短波长的第一光的第一光源，用于发射具有较长波长的第二光的第二光源，光检测器，用于将从第一光发射的光聚焦的物镜和第二光源分别设置在光盘的信息记录表面上，光路改变单元，用于将从第一和第二光源发射的光转移到物镜，并传送从信息记录表面反射的第一和第二光以及平板透镜，用于将从光路改变单元前进的第一光基本上全部透射到物镜，并将从光路改变单元行进的第二光衍射到光学检测器物镜的轴线。

18. 发明授权

US06788636B2 Optical pickup compatible with a digital versatile disk and a recordable compact disk using a holographic ring lens 有权
公开(公告)号：US06788636B2
公开(公告)日：2004-09-07
申请号：US10461430
申请日：2003-06-16
申请人： Jang-Hoon Yoo , Chul-Woo Lee
发明人： Jang-Hoon Yoo , Chul-Woo Lee
IPC分类号： G11B700
CPC分类号： G11B7/1353 , G02B5/32 , G11B7/1275 , G11B7/1372 , G11B7/1374 , G11B7/1378 , G11B7/139 , G11B7/13922 , G11B2007/0006 , G11B2007/13727
摘要： An optical pickup apparatus compatible with at least two types of optical recording media, using light beams having respective different wavelengths for recording and reading information, the optical pickup apparatus including two laser light sources to emit light beams having the different wavelengths, a holographic lens including a holographic ring to transmit the light beams incident in an inner region of the holographic ring, and to diffract a specific light beam among the light beams emitted from the laser light sources incident in an outer region relative to the inner region, an objective lens to focus the light beams passed through the holographic ring lens on the respective information recording surfaces of the two types of the optical recording media, optical elements to alter optical paths of the light beams reflected from the information recording surfaces of the optical recording media to corresponding photodetectors.

19. 发明授权

US06765857B2 Optical recording and pickup head for digital versatile disc compatible with read-writable compact disc by adopting flat plate lens having staircase type diffraction grating structure 有权
$Optical recording and pickup head for digital versatile disc compatible with read-writable compact disc by adopting flat plate lens having staircase type diffraction grating structure$
标题翻译：通过采用具有阶梯式衍射光栅结构的平板透镜，与可读写光盘兼容的数字通用光盘的光学记录和拾取头
公开(公告)号：US06765857B2
公开(公告)日：2004-07-20
申请号：US10178528
申请日：2002-06-25
申请人： Jang-Hoon Yoo , Chul-Woo Lee , Kun-Ho Cho , Pyong-Yong Seong
发明人： Jang-Hoon Yoo , Chul-Woo Lee , Kun-Ho Cho , Pyong-Yong Seong
IPC分类号： G11B700
CPC分类号： G11B7/1353 , G02B5/1876 , G11B7/127 , G11B7/1367 , G11B7/1374 , G11B7/1378 , G11B7/139 , G11B7/13922 , G11B2007/0006 , G11B2007/13727
摘要： An optical recording and pickup head having a flat plate lens of a staircase type diffraction grating structure is compatible with a DVD and a CD-RW. The optical recording and pickup head includes a first optical source for emitting first light having a relatively short wavelength, a second optical source for emitting second light having a relatively long wavelength, a photo detector, an objective lens for focusing the light emitted from the first and second optical sources on the information recording surfaces of the optical discs, respectively, an optical path altering unit for transferring the light emitted from the first and second optical sources to the objective lens and transferring the first and second light reflected from the information recording surfaces of the plurality of discs to the photo detector, respectively, and a flat plate lens for substantially totally transmitting the first light proceeding from the optical path altering unit to the objective lens and diffracting the second light proceeding from the optical path altering unit to the optical axis of the objective lens.
摘要翻译：具有楼梯型衍射光栅结构的平板透镜的光学记录和拾取头与DVD和CD-RW兼容。光学记录和拾取头包括用于发射具有较短波长的第一光的第一光源，用于发射具有较长波长的第二光的第二光源，光检测器，用于将从第一光发射的光聚焦的物镜和第二光源分别在光盘的信息记录表面上，光路改变单元，用于将从第一和第二光源发射的光转移到物镜，并传送从信息记录表面反射的第一和第二光以及平板透镜，用于将从光路改变单元前进的第一光基本上全部透射到物镜，并将从光路改变单元行进的第二光衍射到光学检测器物镜的轴线。

20. 发明授权

US06266315B1 Catadioptric optical system, optical pickup and optical disk drive employing the same, and optical disk 有权
公开(公告)号：US06266315B1
公开(公告)日：2001-07-24
申请号：US09196111
申请日：1998-11-20
申请人： Chul-Woo Lee , Chong-Sam Chung , Yong-Moon Lee , Cheol-Sung Yeon , Joong-Eon Seo , Young-Min Cheong , Dong-Ho Shin , Kun-Mo Cho , Pyong-Yong Seong , Jang-Hoon Yoo
发明人： Chul-Woo Lee , Chong-Sam Chung , Yong-Moon Lee , Cheol-Sung Yeon , Joong-Eon Seo , Young-Min Cheong , Dong-Ho Shin , Kun-Mo Cho , Pyong-Yong Seong , Jang-Hoon Yoo
IPC分类号： G11B700
CPC分类号： G11B7/1387 , G11B7/08576 , G11B7/0901 , G11B7/0908 , G11B7/122 , G11B7/1374 , G11B7/22 , G11B7/24 , G11B11/10547 , G11B11/10554 , G11B11/1058 , G11B11/10584 , G11B2007/13725
摘要： An optical focusing system which uses a light beam emitted from a light source, includes a refractive surface on one side of the optical focusing system and having a first radius of curvature, a first reflection surface on the above one side, surrounding the refractive surface and having a second radius of curvature being different from the first radius of curvature, a transparent beam focusing surface on the other side of the optical focusing system, and a second reflection surface on the above other side and surrounding the beam focusing surface. The refractive surface refracts an incident light beam, the second reflection surface reflects a light beam refracted by the refractive surface toward the first reflection surface, and the first reflection surface focuses a laser light beam reflected from the second reflection surface on the beam focusing surface as a focused beam spot. The optical focusing system can be used in an optical pickup. The optical pickup uses the optical focusing system to generate, from a light beam e.g. laser light emitted from a light source, a beam spot used for recording or reading information to a recording medium. The optical pickup uses a near field effect provided by an optical focusing system according to the present invention, to allow a superior density of recording or reading. Further, the optical focusing system according to the invention can use a light beam having a beam diameter smaller than that of the laser beam used for an existing optical focusing system for forming a near field. Thus, the optical pickup according to the invention can record or read information on an optical disk having a surface recording density of 10 Gbit/inch2 or more. Even if an incident light beam inclination occurs due to movement of the disk or the optical pickup, information can be recorded on or read from a disk accurately. Also, the assembly of the optical focusing system and the adjustment of the assembled optical focusing system are easily performed.

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