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    • 4. 发明申请
    • Optical pickup device
    • 光学拾取装置
    • US20070286037A1
    • 2007-12-13
    • US11810547
    • 2007-06-06
    • Osamu MiyazakiNobumasa OnoKyoji Kasuga
    • Osamu MiyazakiNobumasa OnoKyoji Kasuga
    • G11B7/00
    • G11B7/13927G11B7/08511G11B7/0945G11B7/1376G11B2007/0013
    • A light source, an objective lens which concentrates light from the light source onto an information recording surface of an information storage medium, and a spherical aberration correction mechanism provided on a light path between the light source of the objective lens are provided. The spherical aberration correction mechanism includes a piezoelectric element for moving a coupling lens, a photo interrupter which detects whether the coupling lens has been moved to an initial position, and a spherical aberration correction element control circuit which moves the coupling lens, which has been moved to the initial position, to one of first to n-th (n is an integer not less than 2) positions where light is concentrated onto an information recording surface of one of first to n-th layer of the information storage medium, the distances between the initial position to the respective first to n-th positions having been determined in advance. With this, it is possible to provide an optical pickup device which can stably perform focus control and spherical aberration correction, without increase in the number of photo interrupters.
    • 提供一种光源,将来自光源的光聚集到信息存储介质的信息记录表面上的物镜,以及设置在物镜的光源之间的光路上的球面像差校正机构。 球面像差校正机构包括:用于移动耦合透镜的压电元件,检测耦合透镜是否已经移动到初始位置的光电断续器;以及移动耦合透镜的球面像差校正元件控制电路,其移动 到初始位置,到信息存储介质的第一至第n层之一的信息记录表面上的第一至第n(n是不小于2的整数)中的一个位置,距离 在预先确定的初始位置到相应的第一至第n位置之间。 由此,可以提供能够稳定地进行聚焦控制和球面像差校正的光拾取装置,而不增加光断续器的数量。
    • 5. 发明申请
    • Light receiving and emitting integrated device, optical pickup provided therewith, and optical disk apparatus
    • 光接收和发射集成装置,提供的光学拾取器和光盘装置
    • US20050281141A1
    • 2005-12-22
    • US11159621
    • 2005-06-22
    • Nobumasa Ono
    • Nobumasa Ono
    • G02B27/40G11B7/00G11B7/09G11B7/13G11B7/135
    • G11B7/1353G11B7/0903G11B7/0916G11B7/0943G11B7/131
    • A light receiving and emitting integrated device is provided that can be connected to an IC for an optical pickup of the discrete package type, regardless of use of the knife edge method for a focus servo signal. In the light receiving and emitting integrated device, a diffraction grating branches light emitted from a semiconductor laser into three, namely, first to third lights, a hologram element divided into four regions, namely, first to four regions divides the first to third lights reflected by an optical recording medium, and four light receiving segments provided in a light receiving element receive and detect the first light. A focus servo signal can be obtained by the knife edge method using detection outputs of the first light received and detected by the four light receiving segments.
    • 提供了一种光接收和发射集成装置,其可以连接到用于分立封装类型的光学拾取器的IC,而不管使用用于聚焦伺服信号的刀刃方法。 在光接收和发射集成装置中,衍射光栅将从半导体激光器发射的光分成三个,即第一至第三光,分成四个区域的全息元件,即第一至第四区域,将第一至第三光分成反射 通过光记录介质,并且设置在光接收元件中的四个光接收段接收并检测第一光。 通过使用由四个光接收段接收和检测的第一光的检测输出的刀刃法可以获得聚焦伺服信号。
    • 6. 发明授权
    • Light receiving and emitting integrated device, optical pickup provided therewith, and optical disk apparatus
    • 光接收和发射集成装置,提供的光学拾取器和光盘装置
    • US07606123B2
    • 2009-10-20
    • US11159621
    • 2005-06-22
    • Nobumasa Ono
    • Nobumasa Ono
    • G11B7/00
    • G11B7/1353G11B7/0903G11B7/0916G11B7/0943G11B7/131
    • A light receiving and emitting integrated device is provided that can be connected to an IC for an optical pickup of the discrete package type, regardless of use of the knife edge method for a focus servo signal. In the light receiving and emitting integrated device, a diffraction grating branches light emitted from a semiconductor laser into three, namely, first to third lights, a hologram element divided into four regions, namely, first to four regions divides the first to third lights reflected by an optical recording medium, and four light receiving segments provided in a light receiving element receive and detect the first light. A focus servo signal can be obtained by the knife edge method using detection outputs of the first light received and detected by the four light receiving segments.
    • 提供了一种光接收和发射集成装置,其可以连接到用于分立封装类型的光学拾取器的IC,而不管使用用于聚焦伺服信号的刀刃方法。 在光接收和发射集成装置中,衍射光栅将从半导体激光器发射的光分成三个,即第一至第三光,分成四个区域的全息元件,即第一至第四区域,将第一至第三光分成反射 通过光记录介质,并且设置在光接收元件中的四个光接收段接收并检测第一光。 通过使用由四个光接收段接收和检测的第一光的检测输出的刀刃法可以获得聚焦伺服信号。