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    • 4. 发明申请
    • OPTICAL SCANNING DEVICE
    • 光学扫描装置
    • US20090296559A1
    • 2009-12-03
    • US11721558
    • 2005-12-15
    • Teunis Willem TukkerJoris Jan VrehenBernardus Hendrikus Wilhelmus HendriksStein Kuiper
    • Teunis Willem TukkerJoris Jan VrehenBernardus Hendrikus Wilhelmus HendriksStein Kuiper
    • G11B7/00
    • G11B7/13925G02B3/04G02B3/12G02B27/0031G11B7/1369G11B2007/0006
    • 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.
    • 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。
    • 7. 发明申请
    • Optical Scanning Device
    • 光学扫描装置
    • US20080117786A1
    • 2008-05-22
    • US11813099
    • 2006-01-06
    • Sjoerd StallingaTeunis Willem Tukker
    • Sjoerd StallingaTeunis Willem Tukker
    • G11B7/00
    • G11B7/1353G11B7/1275
    • An optical scanning device for scanning a first optical record carrier, a second, different, optical record carrier and a third, different, optical record carrier, each record carrier having an information layer. The scanning device includes a radiation source system arranged to produce first, second and third radiation beams for scanning the first, second and third record carriers with first, second and third wavelengths, respectively; and a diffraction structure (34) arranged to introduce a first, second and third wavefront modification into the first, second and third radiation beams, respectively. The diffraction structure includes a surface having a plurality of steps (38), each step having a step height (hj) which controls a form of the first, second and third wavefront modifications, characterized in that the diffraction structure is formed from a material having an Abbe number of less than 50, whereby dispersion is provided between the first, second and third wavelengths in order to further control the form of the first, second and third wavefront modifications.
    • 一种用于扫描第一光学记录载体,第二个不同的光学记录载体和第三个不同的光学记录载体的光学扫描装置,每个记录载体具有信息层。 扫描装置包括一个辐射源系统,被布置成产生用于分别用第一,第二和第三波长扫描第一,第二和第三记录载体的第一,第二和第三辐射束; 以及衍射结构(34),其被布置成分别将第一,第二和第三波前修改引入到第一,第二和第三辐射束中。 衍射结构包括具有多个步骤(38)的表面,每个步骤具有控制第一,第二和第三波前修改形式的台阶高度(h SUB),其特征在于, 衍射结构由阿贝数小于50的材料形成,从而在第一,第二和第三波长之间提供色散,以进一步控制第一,第二和第三波前修改的形式。
    • 8. 发明授权
    • Optical scanning device
    • 光学扫描装置
    • US07161891B2
    • 2007-01-09
    • US10531018
    • 2003-09-15
    • Hendrik Josephus GoossensTeunis Willem Tukker
    • Hendrik Josephus GoossensTeunis Willem Tukker
    • G11B7/00
    • G11B7/1356G11B7/08517G11B7/1369G11B7/1378G11B7/14G11B2007/0013
    • An optical head for use in the scanning of a record carrier, the record carrier having data stored on data tracks therein on a plurality of information layers (3, 4) at a plurality of depths within the record carrier. The optical head comprises: a movable optical element (16) arranged in an optical path to act upon a first radiation beam (12) and a second radiation beam (14) to provide the beams with a different displacement perpendicular to the optical path; and a lens system for focusing said first beam (12) at a first focal point (A) on a first information layer (3) of the record carrier and the focusing of the second beam (14) at a second different focal point (B) on a second information layer (4), wherein a spacing, transverse to the data tracks, between said first and second focal points (A, B) is controllable by varying the configuration of the movable optical element.
    • 一种用于扫描记录载体的光学头,所述记录载体具有存储在其中的多个信息层(3,4)上的数据轨道上的数据,所述多个信息层(3,4)处于所述记录载体内的多个深度。 光头包括:可移动光学元件(16),布置在光路中以作用于第一辐射束(12)和第二辐射束(14),以向垂直于光路的不同位置提供光束; 以及透镜系统,用于将所述第一光束(12)在所述记录载体的第一信息层(3)上的第一焦点(A)处聚焦,并且所述第二光束(14)在第二不同焦点(B ),其中在所述第一和第二焦点(A,B)之间横向于数据轨道的间隔可通过改变可移动光学元件的构造来控制。