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    • 51. 发明申请
    • Optical head, optical information storage apparatus, and their fabrication method
    • 光头,光信息存储装置及其制造方法
    • US20060193214A1
    • 2006-08-31
    • US11211438
    • 2005-08-26
    • Takeshi ShimanoMasatoshi KanamaruMasaya Horino
    • Takeshi ShimanoMasatoshi KanamaruMasaya Horino
    • G11B7/00
    • G11B7/08576G11B7/123G11B7/1374
    • In an optical head, if a lens is reduced in size so that it can be integrated with a light source and a photodetector, other optical components as well as the lens must be reduced in size, which would result in greater difficulties in handling for assembly and adjustment purposes. The invention allows large quantities of ultra-small optical heads to be produced accurately and at low cost, the optical heads being easy to adjust and not requiring the handling of minute components for adjustment purposes. A first substrate includes lenses for focusing light on an information storage medium, a second substrate includes detectors and disposed on the surface thereof, and a layer, which is disposed between the first and second substrates, includes prisms and mirrors. The layer also includes cavities in which light sources are disposed. The individual substrates are formed in the form of wafers with the lenses, mirrors, prisms, light sources, and photodetectors disposed thereon.
    • 在光学头中,如果透镜的尺寸减小以使其能够与光源和光电检测器集成,则其它光学部件以及透镜的尺寸必须减小,这将导致更大的装配难度 和调整目的。 本发明允许以低成本准确地,低成本地制造大量的超小型光学头,光学头易于调节,并且不需要处理用于调整目的的微小部件。 第一基板包括用于将光聚焦在信息存储介质上的透镜,第二基板包括检测器并设置在其表面上,并且布置在第一和第二基板之间的层包括棱镜和反射镜。 该层还包括其中设置有光源的空腔。 各个基板以晶片的形式形成,其上设置有透镜,反射镜,棱镜,光源和光电探测器。
    • 54. 发明申请
    • Optical pickup which is compatible with multiple types of media
    • 与多种介质兼容的光学拾音器
    • US20060181977A1
    • 2006-08-17
    • US11272799
    • 2005-11-15
    • Tae-Youn Heor
    • Tae-Youn Heor
    • G11B7/00
    • G11B7/1275G11B7/123G11B7/1356G11B2007/0006
    • A compatible optical pickup can be used with advanced optical discs (AODs), blu-ray discs (BDs), digital versatile discs (DVDs), and compact discs (CDs). The compatible optical pickup comprises a first light source unit for independently projecting first and second short-wavelength laser beams which have different polarizations, a second light source unit for independently projecting first and second long-wavelength laser beams which have different wavelength-range, a first objective lens that has a high numerical aperture suitable for a high density optical information recording medium, a second objective lens that has a low numerical aperture suitable for a low density optical information recording medium, and a light path changing unit for guiding the first short-wavelength laser beams to the first objective lens and guiding the second short-wavelength laser beams, the first long-wavelength laser beams, and the second long-wavelength laser beams to the second objective lens. The first short laser beams of, for example, P-polarized light are for use with a BD, the second short-wavelength laser beams of, for example, S-polarized light, are for use with an AOD, the first long-wavelength laser beams are for use with a DVD, and the second long-wavelength laser beams are for use with a CD.
    • 兼容的光学拾取器可用于高级光盘(AOD),蓝光光盘(BD),数字通用光盘(DVD)和光盘(CD)。 兼容光学拾取器包括用于独立地投影具有不同偏振的第一和第二短波长激光束的第一光源单元,用于独立地投影具有不同波长范围的第一和第二长波长激光束的第二光源单元, 具有适用于高密度光学信息记录介质的高数值孔径的第一物镜,具有适用于低密度光学信息记录介质的低数值孔径的第二物镜,以及用于引导第一短路的光路改变单元 - 将第一长波长激光束和第二长波长激光束引导到第二物镜,并将第二短波长激光束和第二长波长激光束引导到第二物镜。 例如,P偏振光的第一短激光束用于BD,例如S偏振光的第二短波长激光束用于AOD,第一长波长 激光束用于DVD,第二长波长激光束用于CD。
    • 58. 发明授权
    • Optoelectronic device
    • 光电器件
    • US07064898B1
    • 2006-06-20
    • US10129809
    • 2000-11-08
    • Shoichi TakasukaShin'ichi IjimaHideyuki NakanishiAkio Yoshikawa
    • Shoichi TakasukaShin'ichi IjimaHideyuki NakanishiAkio Yoshikawa
    • G02B5/18G02B27/44
    • G11B7/1263G11B7/0903G11B7/123G11B7/131G11B7/1353G11B7/1381G11B7/1395
    • An optoelectronic device that provides an excellent reproduction signal and a stable servo control while preventing deterioration of S/N ratio caused by stray light. The optoelectronic device has a semiconductor laser (101) that emits light beams on an information-recording medium (105), a hologram optical element (102) having a diffraction grating region (108) and located between the semiconductor laser (101) and the information-recording medium (105), and a photodetector (106) for receiving light that is diffracted at the diffraction grating region (108) of the hologram optical element (102), among returning light beams from the information-recording medium (105), and the optoelectronic device has also a diffraction grating region (107) in the vicinity of the diffraction grating region (108) of the hologram optical element (102) so as to prevent stray light other than diffracted light from the diffraction grating region (108) from entering the photodetector (106).
    • 提供优异的再现信号和稳定的伺服控制的光电子器件,同时防止由杂散光引起的S / N比的劣化。 该光电子器件具有在信息记录介质(105)上发射光束的半导体激光器(101),具有衍射光栅区域(108)并且位于半导体激光器(101)和 信息记录介质(105)和用于接收在全息图光学元件(102)的衍射光栅区域(108)处衍射的光的光电检测器(106),在从信息记录介质(105)返回的光束中, ,并且光电子器件在全息光学元件(102)的衍射光栅区域(108)附近还具有衍射光栅区域(107),以防止来自衍射光栅区域(108)的衍射光以外的杂散光 )进入光电检测器(106)。
    • 60. 发明授权
    • Optical pickup device
    • US07009916B2
    • 2006-03-07
    • US10179302
    • 2002-06-26
    • Chon-Su KyongSeung-Man Oh
    • Chon-Su KyongSeung-Man Oh
    • G11B7/00
    • G11B7/1356G11B7/0909G11B7/0916G11B7/123G11B7/1381G11B7/22
    • An optical pickup device including a lead frame and a board attached to the lead frame is provided. The lead frame includes optical components, such as a laser diode and an optical element, which are disposed within a lead frame. A photo diode is mounted on the board to receive a beam transmitted through the optical element. The board is adjusted with respect to the lead frame using the beam before attached to the lead frame. An upper opening and a lower opening are formed on an upper side and a lower side of the lead frame, respectively. An optical element installation space formed within the lead frame and defined by an upper side walls and an optical element support. A hole is formed in a central portion of the optical element support and communicates with the optical element installation space and a photo diode installation space which is defined by the optical element support and a lower side wall of lead frame. The laser diode emitting the beam is mounted on a laser diode support which is formed adjacent to the optical element support in the optical element installation space. The optical element mounted on the optical element support is disposed within the optical element installation space to direct the laser beam emitted from the laser diode toward an optical medium through upper opening and to transmit the laser beam to the photo diode of the board.