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    • 1. 发明申请
    • SPOT SIZE FOCUS ERROR DETECTION FOR MULTIPLE BEAM OPTICAL SCANNING DEVICE
    • 多光束光学扫描装置的光斑尺寸聚焦误差检测
    • WO2006082544A2
    • 2006-08-10
    • PCT/IB2006050284
    • 2006-01-26
    • KONINKL PHILIPS ELECTRONICS NVVAN DER LEE ALEXANDER MLIEDENBAUM COEN T H FTUKKER TEUNIS W
    • VAN DER LEE ALEXANDER MLIEDENBAUM COEN T H FTUKKER TEUNIS W
    • G11B7/09G11B7/13G11B7/14
    • G11B7/0912G11B7/131G11B7/14
    • 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 (Dl) 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.
    • 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)。 该设备(1)包括用于在数据轨道(10)上创建轨道光点(12)的光学单元以及在多个信号检测器上的多个检测器光点。 该装置还包括聚焦误差单元,用于利用光束操纵元件(21,22,22a,92)将第一光路(24)提供给第一分段检测器(8a)的至少一个反射光束,以及 第二光路(25)传送到第二分段检测器(8b)。 第一光路(24)和第二光路(25)的长度呈现差异(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分布 当所述至少一个轨道光点被正确地聚焦并且所述第一分段检测器(8a)上的强度分布不同于所述第二分段检测器(8b)上的所述第二分段检测器(8b)上的所述强度分布时, ),当至少一个轨道光点未被正确地聚焦时。 差值(Dd)实质上小于两个相邻探测器光点(Ds)之间的距离与透镜(7)的数值孔径(NA)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(D1)小于两个相邻检测器光点之间的距离(Ds)。
    • 2. 发明申请
    • SPHERICAL ABERRATION DETECTOR
    • 球形异常检测器
    • WO2006129229A3
    • 2007-02-08
    • PCT/IB2006051625
    • 2006-05-22
    • KONINKL PHILIPS ELECTRONICS NVHENDRIKS BERNARDUS H WSTALLINGA SJOERDLIEDENBAUM COEN T H FKUIPER STEINIMMINK ALBERT H JTUKKER TEUNIS W
    • HENDRIKS BERNARDUS H WSTALLINGA SJOERDLIEDENBAUM COEN T H FKUIPER STEINIMMINK ALBERT H JTUKKER TEUNIS W
    • G11B7/135
    • G11B7/13927G11B7/0948G11B2007/0006
    • 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).
    • 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用于检测反射的第一辐射束的至少一部分以确定第一辐射束的球面像差的像差检测器(24),以及用于衍射至少部分反射的衍射元件(26) 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)。
    • 3. 发明申请
    • OPTICAL SCANNING DEVICE
    • 光学扫描装置
    • WO2004036558A2
    • 2004-04-29
    • PCT/IB0304049
    • 2003-09-12
    • KONINKL PHILIPS ELECTRONICS NVLIEDENBAUM COEN T H FTUKKER TEUNIS W
    • LIEDENBAUM COEN T H FTUKKER TEUNIS W
    • G11B7/00G11B7/005G11B7/135
    • G11B7/005G11B7/135
    • An optical scanning device 1 detects an information signal from an optical record carrier 2 using differential interference contrast. Two radiation beams 13a, 13b are generated and focused to two distinct spots 15a, 15b respectively displaced along a data track on the information layer of an optical record carrier. The relative positions of the spots in lands and pits can generate a path length difference between the reflected beams 17a, 17b. This path length difference causes the beams to interfere either constructively or destructively, depending on the relative land/pit position in the data track of the spots. This interference causes a detectable signal to be generated, the signal being representative of a transition from a pit to a land on the information layer 4 or vice versa.
    • 光学扫描设备1使用差分干涉对比度来检测来自光学记录载体2的信息信号。 两个辐射光束13a,13b被产生并聚焦到分别沿着光学记录载体的信息层上的数据轨道移位的两个不同的点15a,15b。 斑点和凹坑中的斑点的相对位置可以在反射束17a,17b之间产生路径长度差。 这种路径长度差异会造成光束相长或相消干涉,这取决于光斑数据轨道中的相对纹间/凹坑位置。 这种干扰导致产生可检测信号,该信号代表信息层4上从坑到岸的过渡,反之亦然。
    • 4. 发明申请
    • OPTICAL SCANNING DEVICE
    • 光学扫描装置
    • WO2006077542A3
    • 2006-10-05
    • PCT/IB2006050190
    • 2006-01-18
    • KONINKL PHILIPS ELECTRONICS NVTUKKER TEUNIS WVREHEN JORIS J
    • TUKKER TEUNIS WVREHEN JORIS J
    • G11B7/125G11B7/135
    • G11B7/1275G11B7/1367G11B7/13922G11B2007/0006
    • An optical scanning device for scanning optical record carriers, the optical record carriers including a first optical record carrier, a second optical record carrier and a third optical record carrier, the scanning device including a radiation source system (7) for producing first, second and third radiation beams for scanning said first, second and third record carriers, respectively, in first, second and third scanning modes, said first, second and third radiation beams having different predetermined wavelengths, the scanning device comprising an objective lens and an optical compensator, the optical compensator having a non-periodic phase structure through which each of said first, second and third radiation beams are arranged to pass, said non-periodic phase structure including a plurality of stepped annular zones separated by steps, the zones forming a non-periodic radial pattern, the stepped annular zones introducing first, second and third different wavefront modifications into at least part of the first, second and third radiation beams, respectively, characterized in that said objective lens is arranged to apply a focus offset when scanning said first record carrier, which focus offset is arranged to provide a phase modification which, in combination with said optical compensator, compensates spherical aberration in the first radiation beam.
    • 1。一种用于扫描光学记录载体的光学扫描装置,所述光学记录载体包括第一光学记录载体,第二光学记录载体和第三光学记录载体,所述扫描装置包括用于产生第一,第二和第三光学记录载体的辐射源系统(7) 用于在第一,第二和第三扫描模式中分别扫描所述第一,第二和第三记录载体的第三辐射束,所述第一,第二和第三辐射束具有不同的预定波长,所述扫描装置包括物镜和光学补偿器, 所述光学补偿器具有非周期性相位结构,所述第一,第二和第三辐射光束中的每一个均被布置成通过所述非周期性相位结构,所述非周期性相位结构包括由台阶分开的多个台阶式环形区域, 周期性径向图案,阶梯环形区域引入第一,第二和第三不同的波前修改 分别至少部分第一,第二和第三辐射束,其特征在于:所述物镜被设置为在扫描所述第一记录载体时施加聚焦偏移,所述聚焦偏移被设置为提供相位修改,所述相位修改与 所述光学补偿器补偿第一辐射束中的球面像差。
    • 6. 发明申请
    • OPTICAL SCANNING DEVICE
    • 光学扫描装置
    • WO2006067707A3
    • 2006-08-31
    • PCT/IB2005054273
    • 2005-12-15
    • KONINKL PHILIPS ELECTRONICS NVTUKKER TEUNIS WVREHEN JORIS JHENDRIKS BERNARDUS H WKUIPER STEIN
    • TUKKER TEUNIS WVREHEN JORIS JHENDRIKS BERNARDUS H WKUIPER STEIN
    • G02B3/02G02B3/12G11B7/135
    • 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。
    • 9. 发明申请
    • OPTICAL COMPENSATOR, OPTICAL ELEMENT, OPTICAL SCANNING HEAD AN OPTICAL SCANNING DEVICE
    • 光学补偿器,光学元件,光学扫描头光学扫描器件
    • WO2007034389A3
    • 2008-11-06
    • PCT/IB2006053307
    • 2006-09-15
    • KONINKL PHILIPS ELECTRONICS NVTUKKER TEUNIS WVREHEN JORIS J
    • TUKKER TEUNIS WVREHEN JORIS J
    • G11B7/135
    • G11B7/13922G11B7/1353G11B2007/0006G11B2007/0013
    • An optical compensator for use in an optical scanning device for scanning a first optical record carrier (3') having an information layer (2') at a first information layer depth d and a second optical record carrier (3") having an information layer (2") at a second, different information layer depth d2. The scanning of the first and second optical record carrier is effected using a scanning spot (16) formed on the information layer by a first radiation beam having a first wavelength and a second radiation beam having a second, different wavelength respectively. The optical compensator includes a substantially circular phase structure having an annular zone arranged in the path of the first radiation beam and the second radiation beam. The annular zone is adapted for imparting a wavefront modification to said first radiation beam causing destructive interference over the area of the scanning spot (16) for radiation incident on said annular zone; and a wavefront modification to said second radiation beam for compensating spherical aberration. A further aspect of the present invention relates to an optical element for defining the numerical aperture of a radiation beam. The optical compensator or optical element can be used for a two- or three-wavelength system. The invention also discloses an optical scanning head, and an optical scanning device using the optical compensator. The invention also relates to an optical scanning head and an optical scanning device.
    • 一种光学补偿器,用于光扫描装置,用于扫描具有第一信息层深度d的信息层(2')的第一光记录载体(3')和具有信息层的第二光记录载体(3“) (2“)在不同的信息层深度d2处。 第一和第二光学记录载体的扫描是利用形成在信息层上的扫描点(16)通过具有第一波长的第一辐射束和分别具有第二不同波长的第二辐射束来实现的。 光学补偿器包括基本圆形的相位结构,其具有布置在第一辐射束和第二辐射束的路径中的环形区域。 所述环形区域适于对所述第一辐射束赋予波前修正,对所述环形区域上的辐射在所述扫描点(16)的区域上产生相消干涉; 以及对所述第二辐射束的波前修改以补偿球面像差。 本发明的另一方面涉及一种用于限定辐射束的数值孔​​径的光学元件。 光学补偿器或光学元件可用于两个或三个波长系统。 本发明还公开了一种光学扫描头和使用光学补偿器的光学扫描装置。 本发明还涉及一种光学扫描头和光学扫描装置。
    • 10. 发明申请
    • OPTICAL SCANNING DEVICE
    • 光学扫描装置
    • WO2006075271A3
    • 2006-10-26
    • PCT/IB2006050057
    • 2006-01-06
    • KONINKL PHILIPS ELECTRONICS NVSTALLINGA SJOERDTUKKER TEUNIS W
    • STALLINGA SJOERDTUKKER TEUNIS W
    • G02B5/18G11B7/125G11B7/135
    • 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 (h j ) 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,第二不同光学记录载体和第三不同光学记录载体的光学扫描装置,每个记录载体具有信息层。 该扫描装置包括一个辐射源系统,该辐射源系统设置成产生分别用第一,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; 和衍射结构(34),其被布置为分别将第一,第二和第三波前修正引入第一,第二和第三辐射束。 的衍射结构包括具有多个台阶(38)的表面上,具有台阶高度(h Ĵ),其控制所述第一,第二和第三的波前修正的一种形式中,每个步骤特征在于,所述 衍射结构由具有小于50的阿贝数的材料形成,由此在第一波长,第二波长和第三波长之间提供色散,以便进一步控制第一,第二和第三波前修改的形式。