Optical Scanning Device
    3.
    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。

    Spherical Aberration Detector
    5.
    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)。

    Optical scanning device
    7.
    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)。

    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
    10.
    发明申请
    OPTICAL SCANNING DEVICE 审中-公开
    光学扫描装置

    公开(公告)号:US20090296559A1

    公开(公告)日:2009-12-03

    申请号:US11721558

    申请日:2005-12-15

    IPC分类号: G11B7/00

    摘要: An optical scanning device for scanning optical record carriers having cover layers of different thicknesses. The scanning device has a first mode for scanning a first optical record carrier, a second mode for scanning a second optical record carrier and a third mode for scanning third optical record carrier. The device comprises an objective lens system and a switchable optical element having a first discrete state and a different, second discrete state. The element comprises: a fluid system including a first fluid and a different, second fluid (19); a wavefront modifier (17); and a fluid system switch for acting on the fluid system to switch between the first and second discrete states of the element. When the element is in the first discrete state, the wavefront modifier (17) is substantially covered by the first fluid, and when the element is in the second discrete state, the wavefront modifier (17) is substantially covered by the second fluid (19). The wavefront modifier includes a non-periodic phase structure including a plurality of stepped annular zones separated by steps, the zones forming a non-periodic radial pattern, and is characterized in that the wavefront modifier further includes an aspherical surface. The scanning device is arranged to operate using the element in the second state to generate spherical aberration when in the second mode, the aspherical surface of the element in the second state compensating for more than half of the spherical aberration due to the objective lens system and second record carrier in combination.

    摘要翻译: 一种用于扫描具有不同厚度的覆盖层的光学记录载体的光学扫描装置。 扫描装置具有用于扫描第一光学记录载体的第一模式,用于扫描第二光学记录载体的第二模式和用于扫描第三光学记录载体的第三模式。 该装置包括物镜系统和具有第一离散状态和不同的第二离散状态的可切换光学元件。 该元件包括:流体系统,包括第一流体和不同的第二流体(19); 波前修正器(17); 以及用于作用在流体系统上以在元件的第一和第二离散状态之间切换的流体系统开关。 当元件处于第一离散状态时,波前修正器(17)基本被第一流体覆盖,并且当元件处于第二离散状态时,波前修正器(17)基本上被第二流体(19)覆盖 )。 波前修正器包括非周期性相位结构,其包括通过台阶隔开的多个阶梯状环形区域,该区域形成非周期性径向图案,其特征在于波前修正器还包括非球面。 扫描装置被设置为在第二状态下使用元件进行操作以在第二模式中产生球面像差,在第二状态下的元件的非球面补偿由于物镜系统导致的球面像差的一半以上, 第二记录载体组合。