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    • 5. 发明授权
    • Optical pickup apparatus having a holographic optical element
    • 具有全息光学元件的光学拾取装置
    • US5805556A
    • 1998-09-08
    • US777130
    • 1996-12-30
    • Chul-woo LeeJang-hoon YooYong-hoon LeeKyung-hwa Rim
    • Chul-woo LeeJang-hoon YooYong-hoon LeeKyung-hwa Rim
    • G11B7/12G11B7/135G11B7/00
    • G11B7/1353G11B7/123
    • An optical pickup apparatus for recording and reproducing information, which is manufactured to be extremely small in a hybrid type. The optical pickup apparatus includes a first holographic optical element as a beam expander for diffracting to enlarge a diverging angle of an incident beam emitted from a light source and a second holographic optical element as an object lens for diffracting the incident beam whose diverging angle is enlarged by the first holographic optical element to focus the incident beam on an optical disk. Here, the first holographic optical element has a function of a beam splitter for diffracting a reflected beam to be separated as well as a function of a beam expander. The optical pickup apparatus is manufactured to be extremely small and ultralight due to its short optical path. Therefore, the optical pickup apparatus is influential on the miniaturization of various optical information processing systems, and contributes to a stable operation and a high speed search due to its excellent optical performance.
    • 一种用于记录和再现信息的光学拾取装置,其被制造为非常小的混合型。 光拾取装置包括作为扩束器的第一全息光学元件,用于衍射以扩大从光源发射的入射光束的发散角和第二全息光学元件作为用于衍射发散角度扩大的入射光束的物镜 通过第一全息光学元件将入射光束聚焦在光盘上。 这里,第一全息光学元件具有用于衍射待分离的反射光束的分束器以及光束扩展器的功能。 光学拾取装置由于其光路短而被制造成非常小和超轻。 因此,光学拾取装置对各种光学信息处理系统的小型化有影响,由于其优异的光学性能,有助于稳定的操作和高速搜索。
    • 7. 发明授权
    • Optical pickup device
    • 光学拾取装置
    • US06400666B1
    • 2002-06-04
    • US09635520
    • 2000-08-09
    • Jang-hoon YooKun-ho ChoYong-hoon LeeSeok-jung KimSeung-tae JungChul-woo LeeJoong-eon Seo
    • Jang-hoon YooKun-ho ChoYong-hoon LeeSeok-jung KimSeung-tae JungChul-woo LeeJoong-eon Seo
    • G11B7095
    • G11B7/1353G11B7/0956
    • An optical pickup device includes a light source for generating and emitting light, optical path changing means for changing a proceeding path of incident light, an objective lens for focusing incident light on a recording medium which has a recording surface where information is recorded and a protection layer, at the side where light is input, for protecting the recording surface, a main photodetector for detecting the information signal and/or an error signal by receiving the light reflected by the recording surface of the recording medium and passing through the objective lens and the optical path changing means, and an inclination detecting unit for detecting inclination of the recording medium by receiving the light emitted from the light source and reflected by the surface of the protection layer or the recording surface of the recording medium. Thus, since the inclination of the recording medium is detected using the light emitted from the light source and reflected by the surface of the protection layer or the recording surface of the recording medium, without an additional tilt sensor, the number of parts is reduced and the structure of the device is simplified.
    • 一种光拾取装置,包括用于产生和发光的光源,用于改变入射光的行进路径的光路改变装置,用于将入射光聚焦在具有记录信息的记录表面的记录介质上的物镜和保护 层,在输入光的一侧用于保护记录表面;主光电检测器,用于通过接收由记录介质的记录表面反射并穿过物镜的光检测信息信号和/或误差信号;以及 光路改变装置和倾斜检测单元,用于通过接收从光源发射并被保护层的表面或记录介质的记录表面反射的光来检测记录介质的倾斜度。 因此,由于使用从光源发出并由保护层的表面或记录介质的记录表面反射的光来检测记录介质的倾斜度,所以没有附加的倾斜传感器,部件的数量减少,并且 简化了设备的结构。
    • 8. 发明授权
    • Optical pickup assembly and method of detecting tilt
    • 光拾取组件和倾斜检测方法
    • US06466529B1
    • 2002-10-15
    • US09680463
    • 2000-10-06
    • Seok-jung KimYong-hoon LeeTae-kyung KimJang-hoon Yoo
    • Seok-jung KimYong-hoon LeeTae-kyung KimJang-hoon Yoo
    • G11B700
    • G11B7/0935G11B7/0933G11B7/0956
    • An optical pickup assembly having an elastically supported tilt mechanism. The optical pickup assembly includes a bobbin at which an objective lens is mounted and an elastic support member which supports the bobbin in elastic motion with respect to a holder installed at a base. A focus coil and a tracking coil are installed at the bobbin and form a conducting path for driving the objective lens in a focusing direction and a tracking direction. Tilt coils are installed at one side of the bobbin and form a conductive path for driving tilt of the objective lens. A first magnet and a first yoke generate an electromagnetic force to driving the objective lens together with the current carrying focus coil and tracking coil. A second magnet and a second yoke generate an electromagnetic force to driving the objective lens together with the current carrying tilt coils. A position detecting sensor measures relative inclination of the objective lens with respect to a disk, and a balance member coupled to the bobbin to balance the weight of the tilt coils by applying weight corresponding to the weight of the tilt coils at positions symmetrically opposite to the positions of the tilt coils.
    • 一种具有弹性支撑的倾斜机构的光学拾取器组件。 光拾取器组件包括安装物镜的筒管和相对于安装在基座上的保持器弹性运动地支撑筒管的弹性支撑构件。 聚焦线圈和跟踪线圈安装在线轴上并形成用于沿聚焦方向和跟踪方向驱动物镜的导电路径。 倾斜线圈安装在线轴的一侧,形成用于驱动物镜倾斜的导电路径。 第一磁体和第一磁轭一起产生电磁力以与载流聚焦线圈和跟踪线圈一起驱动物镜。 第二磁体和第二磁轭产生电磁力以与载流倾斜线圈一起驱动物镜。 位置检测传感器测量物镜相对于盘的相对倾斜度,以及平衡构件,其耦合到筒管,以通过将对应于倾斜线圈的重量的重量施加在倾斜线圈的重量上来平衡倾斜线圈的重量, 倾斜线圈的位置。
    • 9. 发明授权
    • Swing arm driving type optical recording/reproducing apparatus
    • 摆臂驱动型光记录/重放装置
    • US06590853B1
    • 2003-07-08
    • US09281230
    • 1999-03-30
    • Yong-hoon LeeChul-woo LeeChong-sam ChungKun-ho Cho
    • Yong-hoon LeeChul-woo LeeChong-sam ChungKun-ho Cho
    • G11B7085
    • G11B7/122G11B7/08576G11B7/08594G11B7/14G11B7/24038
    • A swing arm driving type optical recording/reproducing apparatus includes a base, at least one optical disk rotatably installed on the base, both sides of which are information recording surfaces and a plurality of optical pickups which are equal in number to the information recording surfaces so as to form light spots on the respective information recording surfaces of the optical disk. Each optical pickup includes a light source for irradiating light. The apparatus also includes optical path changing units respectively arranged on optical paths between the light sources and respective ones of the information recording surfaces for changing the traveling paths of the lights and objective lenses arranged between the optical path changing units and the respective information recording surfaces for condensing incident light on the respective information recording surfaces. Photodetectors receive the lights reflected from the respective information recording surfaces and incident via the respective objective lenses and the optical path changing units. A swing member includes a mount on which the light sources, the optical path changing units and the photodetectors are installed. A plurality of swing arms extend from the mount. A suspension has one end which is installed on a surface of each swing arm and is adjacent to the respective information recording surface for elastically biasing the other end. A slider is installed at the other end of the suspension, which contacts the respective information recording surface by the elastic bias of the suspension and into which the respective objective lens is loaded. A supporting unit is interposed between the base and the mount for supporting the swing member to be reciprocally rotatable centering around one hinge point on the base and a magnetic driver for reciprocally rotating the swing member.
    • 摇臂驱动型光学记录/再现装置包括基座,至少一个可旋转地安装在基座上的光盘,其两侧是信息记录表面和与信息记录表面相等的多个光学拾取器 以便在光盘的相应信息记录表面上形成光斑。 每个光学拾取器包括用于照射光的光源。 该装置还包括光路改变单元,其分别设置在光源和信息记录表面之间的光路上,用于改变布置在光路改变单元和各个信息记录表面之间的光和物镜的行进路径, 将入射光聚光在相应的信息记录表面上。 光检测器接收从相应的信息记录表面反射并经由各个物镜和光路改变单元入射的光。 摆动构件包括其上安装有光源,光路改变单元和光电检测器的安装件。 多个摆臂从支座延伸。 悬架的一端安装在每个摆臂的表面上,并且与相应的信息记录表面相邻以弹性地偏压另一端。 滑块安装在悬架的另一端,其通过悬架的弹性偏置与相应的信息记录表面接触,并且相应的物镜被加载到该悬架中。 支撑单元插入在基座和支架之间,用于支撑摆动构件以使基座上的一个铰链点为中心往复旋转,以及用于使摆动构件往复旋转的磁性驱动器。