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    • 42. 发明申请
    • Pickup device
    • 拾取装置
    • US20020034108A1
    • 2002-03-21
    • US09891471
    • 2001-06-27
    • Masakazu OgasawaraHajime Koyanagi
    • G11C029/00
    • G11B7/1372G11B7/00745G11B7/0943G11B7/13G11B7/24G11B2007/0013
    • Disclosure is a pickup device of an apparatus for recording or reproducing information, by irradiation of a light beam, to and from a multi-layered recording medium having a plurality of recording layers laminated through spacer layers and formed on the recording layer a pre-pit region having a reflectivity different from a reflectivity of the surrounding. The device includes an illumination optical system having an objective lens for focusing a light beam onto any of the recording layers of the multi-layered recording medium, and a detecting optical system including a photodetector for receiving and photoelectrically converting reflection light from the recording layer of the multi-layered recording medium through the objective lens. The photodetector has a normalized detector size of a size of 10 nullm2 to 50 nullm2.
    • 公开是一种用于通过照射光束将信息记录或再现到具有通过间隔层层叠的多个记录层的多层记录介质并且在记录层上形成预坑的装置的拾取装置 区域具有不同于周围反射率的反射率。 该装置包括具有用于将光束聚焦到多层记录介质的任何记录层上的物镜的照明光学系统,以及一种检测光学系统,包括:光电检测器,用于接收和光电转换来自记录层的记录层的反射光 通过物镜的多层记录介质。 光电检测器具有尺寸为10mum2至50mum2的归一化检测器尺寸。
    • 43. 发明授权
    • Optical device
    • 光学装置
    • US06356526B1
    • 2002-03-12
    • US09522589
    • 2000-03-10
    • Shin Ito
    • Shin Ito
    • G11B712
    • G11B7/1372G11B7/0909G11B7/22
    • In an optical device, first, second and third reference axes intersect at right angles with each other at a predetermined point and a first reference plane is defined by the first and second reference axes with a second reference plane defined by the second reference axis and third reference axis. Frame, functioning as a support, has first and second supporting surfaces extending along first and second reference planes extending along the first reference plane and a third supporting surface extending along the second reference plane. Sensor lens has first, second and third support arms extending radially outward from its periphery. These support arms of the sensor lens have their respective side surfaces pressed, via a leaf spring. against the first, second and third support arms, respectively, and the sensor lens is supported by the frame in such a manner that the center of the sensor lens conforms with the optical axis. Such arrangements can reliably avoid an optical axis deviation that would result from any possible thermal expansion or contraction of the sensor lens.
    • 在光学装置中,第一和第三参考轴在预定点处彼此成直角相交,第一参考平面由第一和第二参考轴限定,第二参考平面由第二参考轴和第三参考轴限定 参考轴。 用作支撑件的框架具有沿着沿着第一参考平面延伸的第一和第二参考平面以及沿着第二参考平面延伸的第三支撑表面延伸的第一和第二支撑表面。 传感器透镜具有从其周边径向向外延伸的第一,第二和第三支撑臂。 传感器透镜的这些支撑臂通过板簧压制各自的侧表面。 分别抵靠第一,第二和第三支撑臂,并且传感器透镜以这样的方式支撑,即传感器透镜的中心与光轴一致。 这样的布置可以可靠地避免由传感器透镜的任何可能的热膨胀或收缩引起的光轴偏差。
    • 48. 发明申请
    • Light receiving and emitting compound element and optical pick-up device using the same
    • 光接收和发射复合元件和使用其的光学拾取装置
    • US20010007543A1
    • 2001-07-12
    • US09754381
    • 2001-01-05
    • ROHM CO., LTD.
    • Haruo TanakaMasahiko Tsumori
    • G11B007/095G11B007/135
    • G11B7/1372G11B7/0909G11B7/123
    • A light emitting portion (1) and an objective lens (3) for collecting a light of the light emitting portion are provided. The light receiving portion (2) is provided in the vicinity of the light emitting portion (1) such that the light can be collected by the objective lens and the light reflected by an optical disk (10) to be an object can be detected. The light emitting portion and the light receiving portion are formed to get in a range of 1.22 null/NA (beam waist BW) wherein a numerical aperture of the objective lens is represented by NA and a wavelength of the light emitting portion is represented by null or the light receiving portion is multi-split such that a focal shift of a beam having an astigmatism formed thereon can be detected. As a result, it is possible to obtain a light receiving and emitting compound element capable of surely detecting a focal position without adjusting a positional relationship between the light emitting portion and the light receiving portion and an optical pick-up device capable of being easily assembled and of detecting and correcting a shift in a focus or a tracking with a high sensitivity.
    • 提供了用于收集发光部分的光的发光部分(1)和物镜(3)。 光接收部分(2)设置在发光部分(1)的附近,使得可以通过物镜收集光,并且可以检测由作为对象的光盘(10)反射的光。 光发射部分和光接收部分形成为1.22兰姆/ NA(束腰BW)的范围,其中物镜的数值孔径由NA表示,并且发光部分的波长由羔羊 或者光接收部分被多分割,使得可以检测到其上形成有像散的光束的焦点偏移。 结果,可以获得能够可靠地检测焦点位置而不调节发光部分和光接收部分之间的位置关系的光接收和发射复合元件以及能够容易地组装的光学拾取装置 并且以高灵敏度检测和校正焦点偏移或跟踪。
    • 49. 发明授权
    • Method of manufacturing a lens system comprising two lens elements
    • 制造包括两个透镜元件的透镜系统的方法
    • US06256287B1
    • 2001-07-03
    • US09294608
    • 1999-04-19
    • Jan P. BaartmanJan W. Aarts
    • Jan P. BaartmanJan W. Aarts
    • G11B700
    • B82Y10/00G11B7/0932G11B7/0933G11B7/0935G11B7/1372G11B7/22G11B2007/13727
    • In an optical recorder and/or player the lens system of the scanning device focuses the light beam into a scanning spot on the information carrier. The lens system includes a main or objective lens and an auxiliary or solid immersion lens to provide the large numerical aperture required for scanning information carriers with a high information density, such as high-density compact discs. At least one lens, in particular the main lens, is suspended in a housing in a direction parallel to the optical axis of the lens system by two elastically deformable mounting elements. When viewed parallel to the optical axis, the mounting elements are distal from each other, and each allow tilting movements of the lens about tilt axes perpendicular to the optical axis, and are substantially undeformable in directions perpendicular to the optical axis. During manufacture of the lens system, the lenses are aligned relative to each other by shifting at least one of the mounting elements in directions perpendicular to the optical axis. The lenses may be positioned parallel to each other by shifting one of the mounting elements in a direction perpendicular to the optical axis, and centered relative to each other by shifting the non-suspended lens in a direction perpendicular to the optical axis. Thus, allowing accurate alignment of the lenses relative to each other using a simple manipulator with limited positioning possibilities.
    • 在光学记录器和/或播放器中,扫描装置的透镜系统将光束聚焦到信息载体上的扫描点。 透镜系统包括主或物镜和辅助或固体浸没透镜,以提供用于扫描具有高信息密度的信息载体所需的大数值孔径,例如高密度光盘。 至少一个透镜,特别是主透镜,通过两个可弹性变形的安装元件在平行于透镜系统的光轴的方向上悬挂在壳体中。 当平行于光轴观察时,安装元件彼此远离,并且每个允许透镜围绕垂直于光轴的倾斜轴的倾斜运动,并且在垂直于光轴的方向上基本上不能变形。 在制造透镜系统期间,透镜通过沿垂直于光轴的方向移动至少一个安装元件来相对于彼此对准。 透镜可以通过沿着垂直于光轴的方向移动一个安装元件而彼此平行地定位,并且通过沿垂直于光轴的方向移动非悬挂透镜而相对于彼此定位。 因此,允许透镜相对于彼此的精确对准使用具有有限定位可能性的简单操纵器。