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    • 5. 发明申请
    • Optical Apparatus Capable of Generating Adaptive Control Signals
    • 能够生成自适应控制信号的光学装置
    • US20080225661A1
    • 2008-09-18
    • US11994534
    • 2006-06-28
    • Mohamad-Hussein El HusseiniStefan GeusensJeroen Arnoldus Leonardus Johannes Raaymakers
    • Mohamad-Hussein El HusseiniStefan GeusensJeroen Arnoldus Leonardus Johannes Raaymakers
    • G11B5/58
    • G11B7/0948
    • The present invention discloses an optical apparatus capable of reproducing/recording information from/to an optical carrier, e.g. a DVD or BD disk. The apparatus has control means for positioning/focusing a radiation beam (5) on the carrier and photo detection means for detection of radiation reflected from the carrier. Additionally, defect detection means (DEFO) for detection of surface defect areas (A1, A2) can indicate where surface defects, e.g. scratches etc., are present. Processing means are adapted for integrating, and preferably differentiate, error signals (RE, FE) immediately after the beam (5.b) is exiting a defect area (A1) for generating adaptive control signals (AD_RE, AD_FE). The optical system is adapted to apply the adaptive control signals (AD_RE, AD_FE) when the beam is positioned in the defect area (A1) again, thereby reducing off-track deviation as the beam (5.d) exits the defect area (A1).
    • 本发明公开了一种能够从光学载体再现/记录信息的光学装置,例如, DVD或BD盘。 该装置具有用于将辐射束(5)定位/聚焦在载体上的控制装置和用于检测从载体反射的辐射的光检测装置。 此外,用于检测表面缺陷区域(A 1,A 2)的缺陷检测装置(DEFO)可以指示表面缺陷,例如, 划痕等。 处理装置适于在波束(5b)离开用于产生自适应控制信号(AD_RE,AD_FE)的缺陷区域(A 1)之后立即整合并优选地区分误差信号(RE,FE)。 当光束再次定位在缺陷区域(A 1)中时,光学系统适于施加自适应控制信号(AD_RE,AD_FE),从而当光束(5d)离开缺陷区域 A 1)。
    • 10. 发明申请
    • Control Method for an Optical Drive with Different Bandwidths
    • 具有不同带宽的光驱的控制方法
    • US20080316877A1
    • 2008-12-25
    • US12097567
    • 2006-12-08
    • Jacobus Anthonie WisseStefan Geusens
    • Jacobus Anthonie WisseStefan Geusens
    • G11B7/00
    • G11B7/08505G11B7/0945
    • The present invention discloses a method for controlling the position of a radiation beam on an optical carrier (1), e.g. a CD, a DVD, a HD-DVD or a BD disc, in an optical drive. Initially, the optical pickup unit (OPU) is fixated relative to the optical carrier and there is established a closed-loop control—so-called capture—in response to an error signal e.g. radial or focus error tracking signal (FE, RE). Then, by servo control means (9, 50) a first bandwidth (BW1) is set in a stabilization period (SP), and subsequently a second bandwidth (B W2) of the servo control means is set. The second bandwidth (B W2) is lower than the first bandwidth (BW1). The invention applies bandwidth switching and thereby provides a more robust operation of the optical drive, as the first and second bandwidths may be separately optimised. Additionally, the power consumption of the optical pickup unit (OPU) may be reduced.
    • 本发明公开了一种用于控制辐射束在光学载体(1)上的位置的方法, CD,DVD,HD-DVD或BD盘。 最初,光学拾取单元(OPU)相对于光学载体固定,并且建立了一个闭环控制 - 所谓的对误差信号的捕获响应。 径向或聚焦误差跟踪信号(FE,RE)。 然后,通过伺服控制装置(9,50),在稳定期(SP)中设定第一带宽(BW1),随后设定伺服控制装置的第二带宽(B W2)。 第二带宽(B W2)低于第一带宽(BW1)。 本发明应用带宽切换,从而提供光驱的更加鲁棒的操作,因为第一和第二带宽可以单独优化。 此外,可以减少光学拾取单元(OPU)的功率消耗。