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    • 73. 发明授权
    • Lens inspection system
    • 镜片检查系统
    • US06373578B1
    • 2002-04-16
    • US09525133
    • 2000-03-14
    • Hiroshi Nishikawa
    • Hiroshi Nishikawa
    • G01B902
    • G01M11/0271G01M11/0228
    • A lens inspection system for evaluating an objective lens system of an optical data recording/reproducing device by measuring a wave front of a light beam emerged from the objective lens system is provided with a laser source and a conversion lens. A laser beam is emitted by the laser source, and is incident on the objective optical system of the optical data recording/reproducing device. Further provided is an interferometer for measuring the wave front. A numerical aperture of an objective lens of the interferometer is smaller than a numerical aperture of the objective lens system of the optical data recording/reproducing device. The conversion lens receives the light beam emerged from the objective lens system of the optical data recording/reproducing device and emerges a light beam to the objective lens of the interferometer such that all the light beam emerged from the conversion lens enters the objective lens of the interferometer.
    • 用于通过测量从物镜系统出射的光束的波前来评估光学数据记录/再现装置的物镜系统的透镜检查系统设置有激光源和转换透镜。 激光束由激光源发射,并入射到光学数据记录/再现装置的物镜光学系统上。 还提供了用于测量波前的干涉仪。 干涉仪的物镜的数值孔径小于光学数据记录/再现装置的物镜系统的数值孔径。 转换透镜接收从光学数据记录/再现装置的物镜系统出射的光束,并将光束出射到干涉仪的物镜,使得从转换透镜出射的所有光束进入到 干涉仪。
    • 75. 发明授权
    • Head for optical disc drive
    • 光盘驱动器头
    • US06292447B1
    • 2001-09-18
    • US09177568
    • 1998-10-23
    • Suguru TakishimaHiroshi Nishikawa
    • Suguru TakishimaHiroshi Nishikawa
    • G11B390
    • G11B7/08576G11B7/08564G11B7/0901G11B7/122G11B7/13G11B11/10532G11B11/10554G11B11/10576G11B11/1058
    • Disclosed is a head of an optical data recording and/or reproducing device. The head is provided with a laser source, an objective optical system, a deflector for deflecting the laser beam emitted by the laser source towards the objective optical system. A relay optical system provided between the deflector and the objective optical system. Further, a detector is provided between the deflector and the relay optical system. The detector has a first and a second light receiving portions and an opening. The two light receiving portions are arranged in a first direction in which the laser beam is deflected by the deflector. A part of the laser beam incident on the detector is received by the first and second light receiving portions, the other passes through the opening. An amount of rotation of the deflector is detected in accordance with amounts of light received by the two light receiving portions.
    • 公开了一种光学数据记录和/或再现装置的头部。 头部设置有激光源,物镜光学系统,用于使由激光源发射的激光束朝向物镜光学系统偏转的偏转器。 设置在偏转器和物镜光学系统之间的中继光学系统。 此外,在偏转器和中继光学系统之间设置检测器。 检测器具有第一和第二光接收部分和开口。 两个光接收部分被布置在激光束被偏转器偏转的第一方向上。 入射到检测器上的激光束的一部分被第一和第二光接收部分接收,另一个通过该开口。 根据由两个光接收部分接收的光量来检测偏转器的旋转量。