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    • 2. 发明申请
    • OPTICAL SCANNING DEVICE
    • 光学扫描装置
    • WO2003001520A1
    • 2003-01-03
    • PCT/IB2002/002309
    • 2002-06-21
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.HENDRIKS, Bernardus, H., W.SCHLEIPEN, Johannes, J., H., B.
    • HENDRIKS, Bernardus, H., W.SCHLEIPEN, Johannes, J., H., B.
    • G11B7/135
    • G11B7/1374G11B7/1362G11B7/139G11B2007/0006G11B2007/13725G11B2007/13727
    • An optical scanning device is suitable for scanning a first information layer (23) of a first optical record carrier (21) with a first radiation beam (27) and a second information layer (47) of a second optical record carrier (45) with a second radiation beam (49). The device includes a radiation source (26) and a lens system (24). The radiation source (26) supplies the first and second radiation beams. The lens system has one optical axis (33) and operates: as a catadioptric system for the first radiation beam in order to transform this beam to a first focused radiation beam (35) having a first numerical aperture (NA1) so as to form a first scanning spot (36) in the position of the first information layer, and as a refractive system for the second radiation beam in order to transform this beam to a second focused radiation beam (52) having a second numerical aperture (NA2), different from the first numerical aperture, so as to form a second scanning spot (53) in the position of the second information layer.
    • 光学扫描装置适于用第一光学记录载体(45)的第一辐射束(27)和第二信息层(47)扫描第一光学记录载体(21)的第一信息层(23) 第二辐射束(49)。 该装置包括辐射源(26)和透镜系统(24)。 辐射源(26)提供第一和第二辐射束。 透镜系统具有一个光轴(33)并且操作:作为用于第一辐射束的反射折射系统,以便将该光束转换成具有第一数值孔径(NA1)的第一聚焦辐射束(35),以便形成 第一扫描点(36)在第一信息层的位置,并且作为用于第二辐射束的折射系统,以便将该光束转换成具有第二数值孔径(NA2)的第二聚焦辐射束(52),不同的 从第一数值孔径开始,以在第二信息层的位置形成第二扫描点(53)。
    • 3. 发明申请
    • METHOD AND APPARATUS FOR FOCUS CONTROL
    • 聚焦控制的方法与装置
    • WO00025309A1
    • 2000-05-04
    • PCT/JP1999/005929
    • 1999-10-27
    • G11B7/09G11B7/095G11B7/13G11B7/135G11B7/26G01B11/00G01C3/06
    • B82Y10/00G11B7/0908G11B7/0917G11B7/0927G11B7/0956G11B7/1362G11B7/1374G11B7/1387G11B7/261G11B2007/13725G11B2007/13727
    • An apparatus is provided for carrying out precise focusing in an optical disk drive by accurately detecting the change in the distance between an optical disk and a solid immersion lens (SIL) or solid immersion mirror (SIM) that is interposed between an object lens and the optical disk to increase the numerical aperture. The apparatus comprises photodetector means (8) for detecting the reflection of light, the light being first incident through an object lens (1) on a SIL (2) or SIM at an angle of incidence such that it makes the numerical aperture greater than one and then being reflected by that side of the SIL (2) or SIM opposite to the optical disk; photodetector means (10) for detecting the light incident on the object lens (1); comparator means (11) for determining the ratio between the luminous energies detected by the photodetector means (8, 10); and control means (11) for controlling a focus actuator based on the ratio determined.
    • 提供了一种用于通过精确地检测介于物镜和物镜之间的光盘和固体浸没透镜(SIL)或固体浸没镜(SIM)之间的距离的变化来进行光盘驱动器中的精确聚焦的装置, 光盘增加数值孔径。 该装置包括用于检测光的反射的光检测器装置(8),该光首先以入射角通过SIL(2)或SIM上的物镜(1)入射,使得数值孔径大于1 然后被与光盘相对的SIL(2)或SIM的那一侧反射; 用于检测入射在物镜(1)上的光的光检测器装置(10); 用于确定由光电检测器装置(8,10)检测的光能之间的比率的比较器装置(11); 以及用于基于所确定的比例控制聚焦致动器的控制装置(11)。
    • 4. 发明申请
    • CATADIOPTRIC OPTICAL SYSTEM, OPTICAL PICKUP AND OPTICAL DISK DRIVE EMPLOYING THE SAME, AND OPTICAL DISK
    • 光电光学系统,光学拾取器和使用其的光盘驱动器和光盘
    • WO99027532A1
    • 1999-06-03
    • PCT/KR1998/000371
    • 1998-11-21
    • G11B7/00G02B27/10G11B7/085G11B7/09G11B7/135G11B7/22G11B7/24G11B11/105G11B7/08G11B7/12
    • G11B7/1387G11B7/08576G11B7/0901G11B7/0908G11B7/122G11B7/1374G11B7/22G11B7/24G11B11/10547G11B11/10554G11B11/10569G11B11/1058G11B11/10584G11B2007/13725
    • An optical focusing system which uses a light beam emitted from a light source, includes a refractive surface on one side of the optical focusing system and having a first radius of curvature, a first reflection surface on the above one side, surrounding the refractive surface and having a second radius of curvature being different from the first radius of curvature, a transparent beam focusing surface on the other side of the optical focusing system, and a second reflection surface on the above other side and surrounding the beam focusing surface. The refractive surface refracts an incident light beam, the second reflection surface reflects a light beam refracted by the refractive surface toward the first reflection surface, and the first reflection surface focuses a laser light beam reflected from the second reflection surface on the beam focusing surface as a focused beam spot. The optical focusing system can be used in an optical pickup. The optical pickup uses the optical focusing system to generate, from a light beam e.g. laser light emitted from a light source, a beam spot used for recording or readinginformation to a recording medium. The optical pickup uses a near field effect provided by an optical focusing system according to the present invention, to allow a superior density of recording or reading. Further, the optical focusing system according to the invention can use a light beam having a beam diameter smaller than that of the laser beam used for an existing optical focusing system for forming a near field. Thus, the optical pickup according to the invention can record or read information on an optical disk having a surface recording density of 10Gbit/inch or more. Even if an incident light beam inclination occurs due to movement of the disk or the optical pickup, information can be recorded on or read from a disk accurately. Also, the assembly of the optical focusing system and the adjustment of the assembled optical focusing system are easily performed.
    • 使用从光源发射的光束的光学聚焦系统包括在光学聚焦系统的一侧上的折射表面,并且具有第一曲率半径,在上述一侧上的第一反射表面,围绕折射表面;以及 具有与第一曲率半径不同的第二曲率半径,在光学聚焦系统的另一侧上的透明光束聚焦表面,以及在另一侧的第二反射表面并且围绕光束聚焦表面。 折射表面折射入射光束,第二反射表面将由折射表面折射的光束反射朝向第一反射表面,并且第一反射表面将从第二反射表面反射的激光束聚焦在光束聚焦表面上作为 聚焦光束点。 光学聚焦系统可用于光学拾取器中。 光学拾取器使用光学聚焦系统从光束(例如, 从光源发射的激光,用于记录或读取信息的光束点到记录介质。 光学拾取器使用由根据本发明的光学聚焦系统提供的近场效应,以允许优异的记录或读取密度。 此外,根据本发明的光聚焦系统可以使用光束直径小于用于形成近场的现有光学聚焦系统的激光束的光束直径。 因此,根据本发明的光学拾取器可以在具有10Gbit / inch 2或更大的表面记录密度的光盘上记录或读取信息。 即使由于盘或光学拾取器的移动而发生入射光束倾斜,也可以将信息准确地记录在盘上或从盘读取。 此外,光聚焦系统的组装和组装的光聚焦系统的调整容易进行。