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    • 6. 再颁专利
    • Optical pickup compatible with a digital versatile disk and a recordable compact disk using a holographic ring lens
    • 光拾取器兼容数字通用光盘和使用全息环形透镜的可刻录光盘
    • USRE43106E1
    • 2012-01-17
    • US11849609
    • 2007-09-04
    • Jang-Hoon YooChul-Woo Lee
    • Jang-Hoon YooChul-Woo Lee
    • G11B7/00
    • G11B7/1353G02B5/32G11B7/1275G11B7/1372G11B7/1374G11B7/1378G11B7/139G11B7/13922G11B2007/0006G11B2007/13727
    • 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.
    • 一种与至少两种类型的光学记录介质兼容的光学拾取装置,使用具有各自不同波长的光束来记录和读取信息,所述光学拾取装置包括两个激光源,以发射具有不同波长的光束;全息透镜,包括 用于透射入射在全息环的内部区域中的光束的全息环,并且从入射在相对于内部区域的外部区域的激光光源发射的光束中衍射特定光束,将物镜衍射到 将通过全息环透镜的光束聚焦在两种类型的光学记录介质,光学元件的相应信息记录表面上,以将从光学记录介质的信息记录表面反射的光束的光路改变为相应的光电检测器 。
    • 8. 发明授权
    • Optical recording/pickup head compatible with a digital versatile disk (DVD) and a recordable compact disk (CD-R) using a holographic variable aperture
    • 与数字通用光盘(DVD)和可记录光盘(CD-R)兼容的光学记录/拾取头,使用全息可变光圈
    • US06363046B1
    • 2002-03-26
    • US09049990
    • 1998-03-30
    • Jang-Hoon YooChul-Woo Lee
    • Jang-Hoon YooChul-Woo Lee
    • G11B700
    • G11B7/1353G11B7/1275G11B7/1365G11B2007/0006
    • An optical recording/pickup head having compatibility with a recordable compact disk (CD-R) and a digital video disk (DVD) transmits a first light beam having a wavelength of 635 nm for a DVD emitted from a first light source and a second light beam having a wavelength of 780 nm for a CD-R emitted from a second light source to an objective lens, using a holographic variable aperture. The holographic variable aperture totally transmits the incident first light beam to the objective lens, and transmits part of the incident second light beam to the objective lens. The objective lens focuses the incident first and second light beams on the information recording surfaces of the CD-R and the DVD. The sizes of the light spots which are focussed on the information recording surfaces of the DVD and the CD-R by the objective lens are approximately 0.9 &mgr;m and 1.4 &mgr;m, respectively, which appropriate for recording and reproducing the respective disks. The light spots have only a main lobe.
    • 具有与可记录光盘(CD-R)和数字视频盘(DVD)兼容的光学记录/拾取头将从第一光源发射的DVD发射具有635nm波长的第一光束和第二光 使用全息可变孔径从第二光源发射到物镜的CD-R的波长为780nm的光束。 全息可变孔径将入射的第一光束全部透射到物镜,并将入射的第二光束的一部分透射到物镜。 物镜将入射的第一和第二光束聚焦在CD-R和DVD的信息记录表面上。 通过物镜聚焦在DVD和CD-R的信息记录表面上的光斑的大小分别大约为0.9μm和1.4μm,这适合于记录和再现各个光盘。 光点只有一个主瓣。
    • 9. 发明授权
    • Compatible optical pickup
    • 兼容光学拾音器
    • US06337841B1
    • 2002-01-08
    • US09425887
    • 1999-10-25
    • Kun-Soo KimJong-Ryull KimMyoung-Soo ChoiHyung-Taek OhJong-Hwa YuChul-Woo LeeKun-Ho ChoPyong-Yong SeongJang-Hoon Yoo
    • Kun-Soo KimJong-Ryull KimMyoung-Soo ChoiHyung-Taek OhJong-Hwa YuChul-Woo LeeKun-Ho ChoPyong-Yong SeongJang-Hoon Yoo
    • G11B700
    • G02B5/1876G11B7/1353G11B7/1367G11B7/1374G11B2007/0006G11B2007/13727
    • A compatible optical pickup capable of recording or reproducing information on or from compact disc (CD) family media such as CD rewritable (CD-RW) and digital versatile disc (DVD) by adopting a stepped planar lens having a plurality of gratings. The compatible optical pickup includes a first optical source for emitting a first light beam having a predetermined wavelength; a second optical source for emitting a second light beam having a long wavelength relative to the first light beam; an optical path changing element for changing the traveling path of an incident light beam; an objective lens for condensing the first and second light beams onto optical discs having different thicknesses, respectively; an optical diffraction element having a first region which directly transmits the first and second light beams incident thereto, and a second region bounding the first region, which directly transmits the incident first light beam and diffractingly transmits the second light beam toward an optical axis; and a photodetector for detecting an information signal and an error signal from the first and second light beam which have been reflected by the optical discs and passed through the optical path changing element. Also, the optical diffraction element is a stepped planar lens in which one or more stepped pattern periods each having a plurality of annular gratings are arranged in the second region, wherein the depths of the gratings become smaller moving away from the optical axis, and the maximum depth thereof is a predetermined value.
    • 一种兼容的光学拾取器,其能够通过采用具有多个光栅的阶梯式平面透镜来记录或再现诸如CD可重写(CD-RW)和数字通用光盘(DVD)的光盘(CD)族介质上的信息。 兼容光学拾取器包括用于发射具有预定波长的第一光束的第一光源; 用于发射相对于第一光束具有长波长的第二光束的第二光源; 用于改变入射光束的行进路径的光路改变元件; 用于将第一和第二光束分别聚光到具有不同厚度的光盘上的物镜; 光学衍射元件,其具有直接透射入射到其上的第一和第二光束的第一区域和限定第一区域的第二区域,该第二区域直接透射入射的第一光束并将第二光束衍射地朝向光轴传播; 以及光检测器,用于检测已被光盘反射并通过光路改变元件的来自第一和第二光束的信息信号和误差信号。 此外,光学衍射元件是阶梯式平面透镜,其中在第二区域中布置有具有多个环形光栅的一个或多个阶梯图案周期,其中光栅的深度变得较小,远离光轴移动,并且 其最大深度是预定值。
    • 10. 发明授权
    • Optical pickup using objective lens compatible with a plurality of optical disks
    • 使用与多个光盘兼容的物镜的光学拾取器
    • US06285646B1
    • 2001-09-04
    • US09198451
    • 1998-11-24
    • Jang-Hoon YooYong-Jae LeePyong-Yong SeongChul-Woo Lee
    • Jang-Hoon YooYong-Jae LeePyong-Yong SeongChul-Woo Lee
    • G11B700
    • G11B7/1374G11B2007/0006
    • An optical pickup device including an objective lens which is compatible with a plurality of optical disks of respectively different specifications, such as a digital versatile disk (DVD), a compact disk-recordable (CD-R) medium, a compact disk (CD) and a laser disk (LD). The optical pickup device includes a laser source to emit light, an objective lens to focus the light emitted from the laser source on respective information recording surfaces of a plurality of optical recording media as an optimal optical spot, and an optical detector to detect light reflected from the information recording surface of the optical recording medium on which the optical spot has been focused and transmitted through the objective lens. The objective lens includes a first lens area, a second lens area, and a third lens area to focus the light emitted from the laser source. The first lens area has an aspherical surface corresponding to a first optical recording medium and a second optical recording medium, the second lens area has an aspherical surface corresponding to the second optical recording medium, and the third lens area has an aspherical surface corresponding to the first optical recording medium. As a result, the optical pickup can be compatible with a plurality of the optical disks of a respectively different specification irrespective of the thickness of the disk.
    • 一种光学拾取装置,包括与分别不同规格的多个光盘兼容的物镜,诸如数字通用盘(DVD),可压缩盘可记录(CD-R)介质,光盘(CD) 和激光盘(LD)。 光拾取装置包括用于发光的激光源,将从激光源发射的光聚焦到作为最佳光点的多个光记录介质的各个信息记录表面上的物镜,以及检测反射光的光检测器 从其上已经聚焦并透过物镜的光记录介质的信息记录表面。 物镜包括第一透镜区域,第二透镜区域和用于聚焦从激光源发射的光的第三透镜区域。 第一透镜区域具有对应于第一光学记录介质和第二光学记录介质的非球面,第二透镜区域具有对应于第二光学记录介质的非球面,并且第三透镜区域具有对应于第二光学记录介质的非球面 第一光记录介质。 结果,光拾取器可以与分别不同规格的多个光盘兼容,而与盘的厚度无关。