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    • 3. 发明授权
    • Optical pickup device and objective lens for the optical pickup device
    • 用于光学拾取装置的光学拾取装置和物镜
    • US07193954B2
    • 2007-03-20
    • US10805730
    • 2004-03-22
    • Katsuya YagiYuichi AtarashiTohru KimuraKiyono Ikenaka
    • Katsuya YagiYuichi AtarashiTohru KimuraKiyono Ikenaka
    • G11B7/00
    • G11B7/1378G11B7/1275G11B7/1353G11B7/13922G11B7/13925G11B2007/0006G11B2007/13727
    • An optical pickup apparatus includes first, second and third light sources; a light converging optical system including a first objective optical element and a second objective optical element, wherein the first objective optical element converges the light flux emitted from the first light source on a first information recording surface, the second objective optical element converges the light flux emitted from the third light source on a third information recording surface, and the first objective optical element or the second objective optical element converges the light flux emitted from the second light source on a second information recording surface; a lens holder holding the first objective optical element and the second objective element therein; and a chromatic aberration correcting element which corrects a chromatic aberration caused by a wavelength variation in a light flux emitted by the first light source.
    • 光拾取装置包括第一,第二和第三光源; 包括第一物镜光学元件和第二物镜光学元件的聚光光学系统,其中所述第一物镜光学元件将从所述第一光源发射的光束会聚在第一信息记录表面上,所述第二物镜光学元件会聚所述光通量 并且所述第一物镜光学元件或所述第二物镜光学元件将从所述第二光源射出的光束会聚在第二信息记录面上, 保持所述第一物镜光学元件和所述第二物镜元件的透镜保持器; 以及色差校正元件,其校正由第一光源发射的光束中的波长变化引起的色差。
    • 7. 发明申请
    • Optical pickup apparatus
    • 光拾取装置
    • US20050111516A1
    • 2005-05-26
    • US10982053
    • 2004-11-04
    • Takuji HatanoYuichiro OriKatsuya YagiYuichi Atarashi
    • Takuji HatanoYuichiro OriKatsuya YagiYuichi Atarashi
    • G11B7/125G11B7/00G11B7/1263G11B7/135G11B7/1372G11B7/1392G11B7/1395G11B7/1398H01S3/08
    • G11B7/1263G11B7/13925G11B7/1395G11B7/1398G11B2007/0006G11B2007/13727
    • An optical pickup apparatus detects optical information by making a laser beam in a 405 nm wavelength band emitted from a semiconductor laser light source incident on an optical information recording medium and then making the laser beam reflected from the optical information recording medium incident on a photodetector. The optical pickup apparatus has a polarizing beam splitter including a polarizing beam splitting film that forms an optical path from the semiconductor laser light source to the optical information recording medium by reflecting the s-polarized component of the laser beam and that forms an optical path from the optical information recording medium to the photodetector by transmitting the p-polarized component of the laser beam; and a monitoring sensor that receives the laser beam to monitor the laser output intensity of the semiconductor laser light source. The polarizing beam splitter transmits part of the s-polarized component, and the monitoring sensor receives this part of the s-polarized component in a position where the center line of the effective light beam received by the monitoring sensor does not coincide with the principal ray of that part of the s-polarized component.
    • 光拾取装置通过使入射在光信息记录介质上的半导体激光光源发射的405nm波长带中的激光束,并使从光信息记录介质反射的激光束入射到光电检测器上来检测光信息。 光拾取装置具有偏振分束器,该偏振光束分离器包括偏振分束膜,该偏振分束膜通过反射激光束的s偏振分量形成从半导体激光源到光信息记录介质的光路,并形成光路 通过透射激光束的p偏振分量将光学信息记录介质传送到光电检测器; 以及监测传感器,其接收激光束以监测半导体激光光源的激光输出强度。 偏振光束分离器透射部分s偏振分量,监测传感器接收该偏振分量的该部分,其中监测传感器接收的有效光束的中心线与主光线不一致 的那部分s偏振分量。