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    • 27. 发明授权
    • Optical pickup apparatus
    • 光拾取装置
    • US06369963B1
    • 2002-04-09
    • US09611273
    • 2000-07-06
    • Tohru HottaIkuo KasugaKatsushige Yanagisawa
    • Tohru HottaIkuo KasugaKatsushige Yanagisawa
    • G02B702
    • G11B7/082G02B7/10G11B7/08582
    • An optical pickup apparatus has an objective lens, a lens holder that mounts the objective lens, a main frame holding the lens holder, and first and second inclination angle adjusting mechanism for adjusting angles of inclination of the objective lens. A main shaft guide frame is mounted on one side of the main frame. A main shaft mounted on the main shaft guide frame for guiding the objective lens in a radial direction of an optical disc. An auxiliary shaft guide frame is mounted on another side of the main frame. An auxiliary shaft is mounted on the auxiliary shaft guide groove to allow the objective lens to slidably move in parallel with the main shaft. The first inclination angle adjusting mechanism has a first bearing shaft for rotatably supporting the main shaft guide frame about a first axis with respect to the main frame. The main shaft defines a second axis extending generally in parallel with the main shaft and perpendicular to the first axis. The second inclination angle adjusting mechanism has a second bearing shaft for rotatably supporting an auxiliary shaft guide frame with respect to the main frame about a third axis that is located between the main shaft and the auxiliary shaft and extends in parallel with the second axis.
    • 光学拾取装置具有物镜,安装物镜的透镜保持架,保持透镜保持架的主框架,以及用于调节物镜的倾斜角度的第一和第二倾斜角度调节机构。 主轴引导框架安装在主框架的一侧。 安装在主轴引导框架上的主轴,用于在光盘的径向方向上引导物镜。 辅助轴引导框架安装在主框架的另一侧。 辅助轴安装在辅助轴引导槽上,以允许物镜与主轴平行地滑动移动。 第一倾斜角调节机构具有第一轴承轴,用于相对于主框架围绕第一轴线可旋转地支撑主轴引导框架。 主轴限定大致平行于主轴并垂直于第一轴线延伸的第二轴线。 第二倾斜角调节机构具有第二轴承轴,用于相对于主框架围绕位于主轴和辅助轴之间并与第二轴线平行延伸的第三轴线可旋转地支撑辅助轴引导框架。
    • 28. 发明授权
    • Optical head device having a plurality of optical elements with various transmission efficiencies
    • 具有多个具有各种传输效率的光学元件的光学头装置
    • US06961298B2
    • 2005-11-01
    • US10061244
    • 2002-02-04
    • Katsushige Yanagisawa
    • Katsushige Yanagisawa
    • G11B7/00G11B7/125G11B7/135
    • G11B7/1353G11B7/1263G11B7/1275G11B7/135G11B7/1381G11B2007/0006
    • In an optical head device for recording/reproducing information on/from an optical recording medium, at least one laser light source emits a laser light beam provided with a first polarized light component and a second polarized light component which are perpendicular to each other. A plurality of optical elements transmit a return light beam reflected by the optical recording medium passes to the light receiving element. A transmission efficiency for the first polarized light component and a transmission efficiency for the second polarized light component in each optical element is made different. A total transmission efficiency for the first polarized light component and a total transmission efficiency for the second polarized light component, which are defined by the respective transmission efficiencies of all the optical elements, are made substantially identical.
    • 在用于在光学记录介质上记录/再现信息的光学头装置中,至少一个激光光源发射设置有彼此垂直的第一偏振光分量和第二偏振光分量的激光束。 将由光记录介质反射的返回光束传送到光接收元件的多个光学元件。 使各个光学元件中的第一偏振光分量的透射效率和第二偏振光分量的透射效率不同。 使得由所有光学元件的各个透射效率限定的第一偏振光分量的总传输效率和第二偏振光分量的总传输效率基本相同。
    • 29. 发明授权
    • Optical pick-up device
    • 光学拾取装置
    • US06584061B2
    • 2003-06-24
    • US09728087
    • 2000-12-04
    • Katsushige YanagisawaTohru HottaIkuo KasugaSatoru Kishita
    • Katsushige YanagisawaTohru HottaIkuo KasugaSatoru Kishita
    • G11B700
    • G11B7/1356G11B7/1362G11B2007/0006
    • An optical system of an optical pick-up device 1 comprises a half mirror 13 and a prism 14 which serve to guide a first laser beam L1 for a CD and a second laser beam L2 for a DVD to the optical recording medium side and a common light receiving element 19. The half mirror 13 is set to have a ratio of a reflectance to a transmittance of 5:1 in the first laser beam L1 to be a P polarized light and the prism 14 is set to have a ratio of a reflectance to a transmittance of 1:3 in the first laser beam L2 having a P polarization component and an S polarization component mixed. The first laser beam for a CD can be guided to the optical recording medium without a light quantity loss. At the same time, a return light Lr can be sent in a sufficient light quantity back to the light receiving element 19 for servo signal generation. Therefore, it is possible to implement a reliable CD recording operation by using the first laser beam.
    • 光学拾取装置1的光学系统包括半反射镜13和棱镜14,其用于将用于CD的第一激光束L1和用于DVD的第二激光束L2引导到光学记录介质侧,并且公共 受光元件19.半反射镜13被设定为在第一激光束L1中的反射率与5:1的透射率之比为P偏振光,棱镜14被设定为具有反射率 在具有P偏振分量和S偏振分量混合的第一激光束L2中透射率为1:3。 用于CD的第一激光束可以被引导到光学记录介质而没有光量损失。 同时,返回光Lr可以以足够的光量发送回光接收元件19,用于产生伺服信号。 因此,可以通过使用第一激光束来实现可靠的CD记录操作。