Optical Scanning Device
    2.
    发明申请
    Optical Scanning Device 审中-公开
    光学扫描装置

    公开(公告)号:US20080186831A1

    公开(公告)日:2008-08-07

    申请号:US11817806

    申请日:2006-03-06

    IPC分类号: G11B7/00

    摘要: An optical scanning device (1) includes a radiation source (7), a detector (23) and a beam splitter (9). The radiation source (7) provides an incident radiation beam (4, 20) along a first optical path (19a) for scanning an information layer (2) of an optical record carrier (3). The detector (23) detects at least a portion of the radiation beam (22) reflected from the optical record carrier (3). The beam splitter (9) transmits the incident radiation beam (4) received from the radiation source along the first optical path (19a) towards the optical record carrier. The beam splitter (9) also transmits the reflected beam (22) received from the optical record carrier (3) along a second, different optical path (19b) towards the detector. The optical scanning device further includes a beam-deflecting element (30; 130; 230; 330; 630; 830; 930) positioned on the second optical path (19b) between the beam splitter (9) and the detector (23). The beam-deflecting element (30; 130; 230; 330; 630; 830; 930) is arranged to controllably deflect the path of the reflected radiation beam (22) for adjusting the lateral position of said reflected radiation beam incident upon the detector (23) over a predetermined range.

    摘要翻译: 光学扫描装置(1)包括辐射源(7),检测器(23)和分束器(9)。 辐射源(7)沿着第一光路(197)提供入射辐射束(4,20),用于扫描光学记录载体(3)的信息层(2)。 检测器(23)检测从光学记录载体(3)反射的辐射束(22)的至少一部分。 分束器(9)将从辐射源接收的入射辐射束(4)沿着第一光路(21a)传送到光学记录载体。 分束器(9)还将从光学记录载体(3)接收的反射光束(22)沿着第二不同的光路(20b)传送到检测器。 光学扫描装置还包括位于分束器(9)和检测器(23)之间的位于第二光路(19b)上的光束偏转元件(30; 130; 230; 330; 630; 830; 930)。 光束偏转元件(30; 130; 230; 330; 630; 830; 930)被布置成可控地偏转反射的辐射束(22)的路径,用于调节入射到检测器上的所述反射的辐射束的横向位置( 23)超过预定范围。

    Optical scanning device
    4.
    发明授权
    Optical scanning device 失效
    光学扫描装置

    公开(公告)号:US07170832B2

    公开(公告)日:2007-01-30

    申请号:US10527870

    申请日:2003-09-12

    IPC分类号: G11B7/00

    摘要: A optical scanning device (1) for scanning an information layer (2) with a radiation beam (25) in a writing mode and a reading mode comprises a radiation source (7) for emitting the beam and an objective lens (10) for converging the beam so as to form a scanning spot (19) in the information layer. The device also includes a scanning spot power switch (20) for switching the size of the cross-section of the beam between a first size at the writing mode and a second, larger size at the reading mode so as to switch the rim intensity of the beam between a first intensity level (Irim,writing) at the writing mode and a second, higher intensity level (Irim,reading) at the reading mode, thereby switching the light power of the scanning spot between a first power level (Pwriting) at the writing mode and a second, lower power level (Preading) at the reading mode.

    摘要翻译: 一种用于以写入模式和读取模式用辐射束(25)扫描信息层(2)的光学扫描装置(1)包括用于发射光束的辐射源(7)和用于会聚的物镜(10) 以在信息层中形成扫描点(19)。 该装置还包括扫描点电源开关(20),用于在写入模式下在第一尺寸和读取模式之间切换第二尺寸的第二尺寸的横梁的横截面尺寸, 所述光束在所述写入模式下处于第一强度水平(Irim,写入)和在所述读取模式下的第二较高强度水平(Irim,读数)之间,从而将所述扫描点的光功率切换到第一功率水平(Pwriting) 在读取模式下为第二,较低功率级(Preading)。

    Spherical Aberration Detector
    6.
    发明申请
    Spherical Aberration Detector 审中-公开
    球面异常检测器

    公开(公告)号:US20080192600A1

    公开(公告)日:2008-08-14

    申请号:US11915633

    申请日:2006-05-22

    IPC分类号: G11B5/58

    摘要: An optical scanning device (1) for scanning at least one information layer (2) of at least one optical record carrier (3). The device includes a radiation source (7) for providing at least a first radiation beam (4) comprising a first wavelength, an objective lens system (8) for converging the first radiation beam on a respective information layer (2), an information detector (23) for detecting at least a portion of the first radiation beam (22) reflected from the respective information layer, for determining information on said layer, and a spherical aberration detection system. The spherical aberration detection system includes an aberration detector (24) for detecting at least a portion of the reflected first radiation beam for determining spherical aberration of the first radiation beam, and a diffractive element (26) for diffracting at least a portion of the reflected first radiation beam towards the aberration detector (24), and for transmitting at least a portion of the reflected first radiation beam towards the information detector (23). In a first mode of operation the grating is arranged to introduce a phase change to an incident portion of a radiation beam for transmitting that portion towards the information detector (23). In a second mode of operation the grating is arranged to introduce a phase change to an incident portion of the reflected first radiation beam for diffracting that portion towards the aberration detector (24).

    摘要翻译: 一种用于扫描至少一个光学记录载体(3)的至少一个信息层(2)的光学扫描装置(1)。 该装置包括用于提供至少包括第一波长的第一辐射束(4)的辐射源(7),用于将第一辐射束会聚在相应的信息层(2)上的物镜系统(8),信息检测器 (23),用于检测从各个信息层反射的第一辐射束(22)的至少一部分,用于确定关于所述层的信息,以及球面像差检测系统。 球面像差检测系统包括:像差检测器(24),用于检测用于确定第一辐射束的球面像差的反射的第一辐射束的至少一部分;以及衍射元件(26),用于衍射至少部分反射 朝向像差检测器(24)的第一辐射束,并且用于将反射的第一辐射束的至少一部分传送到信息检测器(23)。 在第一操作模式中,光栅布置成将相位变化引入辐射束的入射部分,以将该部分传送到信息检测器(23)。 在第二操作模式中,光栅布置成将相变引入到反射的第一辐射束的入射部分,以将该部分衍射到像差检测器(24)。

    Birefringent optical system
    8.
    发明授权
    Birefringent optical system 失效
    双折射光学系统

    公开(公告)号:US07440075B2

    公开(公告)日:2008-10-21

    申请号:US10599068

    申请日:2005-03-14

    IPC分类号: G02B27/12

    摘要: The invention relates to an optical system comprising a fluid chamber 1 and a birefringent part. The fluid chamber comprises first and second fluids 10, 12 having different indices of refraction, the interface between the fluids forming a meniscus 14. The birefringent part is capable of varying characteristics of a first radiation beam 3b and a second radiation beam 3c, the first and second radiation beams having different polarisations. Variation in the configuration of the meniscus causes variation in the characteristics of the first radiation beam and the second radiation beam. Variation in the configuration of the meniscus may be controlled by electrowetting.

    摘要翻译: 本发明涉及一种包括流体室1和双折射部分的光学系统。 流体室包括具有不同折射率的第一和第二流体10,12,形成弯液面14的流体之间的界面。 双折射部分能够改变第一辐射束3b和第二辐射束3c的特性,第一和第二辐射束具有不同的极化。 弯液面的构造的变化导致第一辐射束和第二辐射束的特性的变化。 弯液面的构型的变化可以通过电润湿来控制。

    Optical scanning device
    9.
    发明授权
    Optical scanning device 失效
    光学扫描装置

    公开(公告)号:US07184387B2

    公开(公告)日:2007-02-27

    申请号:US10528677

    申请日:2003-09-18

    IPC分类号: G11B7/135 G02B5/30

    CPC分类号: G11B7/1367

    摘要: An optical scanning device for scanning an optical record carrier comprising an information layer. Crosstalk cancellation is provided using a phase modulating element (40, 140) for generating a non-rotationally-symmetric phase profile in a subsidiary radiation beam. The phase profile varies with an azimuthal angle measured about the optical axis of the beam portion, the phase profile varying such that successively different phases are introduced in at least five locations which are each at successive azimuthal angles (φ1, φ2, φN) and each at a given radial distance from the optical axis, wherein the phase profile is such that the phases introduced, when taken in modulo 2π form, successively cycle through 0 to 2π at least twice, whereby the subsidiary beam spot is provided with an intensity distribution on the information layer which overlaps that of the side-lobe of the main beam spot.

    摘要翻译: 一种用于扫描包括信息层的光学记录载体的光学扫描装置。 使用用于在辅助辐射束中产生非旋转对称相位轮廓的相位调制元件(40,140)来提供串扰消除。 相位轮廓随着围绕光束部分的光轴测量的方位角而变化,相位轮廓变化使得连续不同的相位被引入至少五个位置,每个位置处于连续的方位角(phi <1 / 并且各自在距离光轴的给定的径向距离处,其中相位轮廓使得当以2×2pi为单位时引入的相位 形成,连续地循环0至2pi至少两次,由此辅助光束点在信息层上提供与主光束点的旁瓣重叠的强度分布。

    Spot Size Focus Error Detection For Multiple Beam Optical Scanning Device
    10.
    发明申请
    Spot Size Focus Error Detection For Multiple Beam Optical Scanning Device 审中-公开
    多光束光学扫描装置的斑点聚焦误差检测

    公开(公告)号:US20080159112A1

    公开(公告)日:2008-07-03

    申请号:US11815107

    申请日:2006-01-26

    IPC分类号: G11B7/00

    CPC分类号: G11B7/0912 G11B7/131 G11B7/14

    摘要: A device (1) for scanning an optical disc (6), the disc (6) comprising substantially parallel data tracks (10). The device (1) comprises an optical unit for creating track light spots (12) on the data tracks (10) and a plurality of detector light spots on a plurality of signal detectors. The device further comprises a focus error unit for with a beam manipulating element (21, 22, 22a, 92) for providing for at least one of the reflected beams a first optical path (24) to a first segmented detector (8a) and a second optical path (25) to a second segmented detector (8b). The lengths of the first optical path (24) and the second optical path (25) exhibit a difference (Dd), such that an intensity distribution of a first detector light spot on the first segmented detector (8a) is equal to an intensity distribution of a second detector light spot on the second segmented detector (8b) when the at least one track light spot is correctly focussed and that the intensity distribution on the first segmented detector (8a) differs from the intensity distribution on the second segmented detector (8b) when the at least one track light spot is not correctly focussed. The difference (Dd) is substantially less than a quotient of a distance between two adjacent detector light spots (Ds) and a numerical aperture (NA) of the lens (7). A dimension (D1) of a light detecting area of the segmented detectors in a direction of adjacent detector light spots is less than the distance (Ds) between two adjacent detector light spots.

    摘要翻译: 一种用于扫描光盘(6)的设备(1),所述盘(6)包括基本上平行的数据轨道(10)。 设备(1)包括用于在数据轨道(10)上创建轨道光点(12)的光学单元和多个信号检测器上的多个检测器光点。 该装置还包括一个聚焦误差单元,用于与光束操纵元件(21,22,22a,92)一起提供至少一个反射光束到第一分段检测器(8a)的第一光路(24) 以及到第二分段检测器(8b)的第二光路(25)。 第一光路(24)和第二光路(25)的长度呈现差(Dd),使得第一分段检测器(8a)上的第一检测器光点的强度分布等于强度 当所述至少一个轨道光点被正确聚焦并且所述第一分段检测器(8a)上的强度分布与所述第二分段检测器(8a)上的强度分布不同时,所述第二分段检测器(8b)上的第二检测器光点的分布 当至少一个轨道光点未被正确聚焦时,检测器(8b)。 差值(Dd)基本上小于两个相邻检测器光点(Ds)和透镜(7)的数值孔径(NA)之间的距离的商。 分段检测器的光检测区域在相邻检测器光点的方向上的尺寸(D 1)小于两个相邻检测器光点之间的距离(Ds)。