CN1144192C - 光学头总成 - Google Patents

光学头总成 Download PDF

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Publication number
CN1144192C
CN1144192C CNB001314475A CN00131447A CN1144192C CN 1144192 C CN1144192 C CN 1144192C CN B001314475 A CNB001314475 A CN B001314475A CN 00131447 A CN00131447 A CN 00131447A CN 1144192 C CN1144192 C CN 1144192C
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Prior art keywords
coil
tilt
object lens
support
probe assembly
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Expired - Fee Related
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CNB001314475A
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CN1294381A (zh
Inventor
金石中
李容勋
金泰敬
刘长勋
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Samsung Electronics Co Ltd
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Samsung Electronics Co Ltd
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    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08Disposition or mounting of heads or light sources relatively to record carriers
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0925Electromechanical actuators for lens positioning
    • G11B7/0935Details of the moving parts
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0925Electromechanical actuators for lens positioning
    • G11B7/0933Details of stationary parts
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/095Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following specially adapted for discs, e.g. for compensation of eccentricity or wobble
    • G11B7/0956Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following specially adapted for discs, e.g. for compensation of eccentricity or wobble to compensate for tilt, skew, warp or inclination of the disc, i.e. maintain the optical axis at right angles to the disc

Abstract

一种光学头总成,包括:一个在其上安装一个物镜的支架;一个弹性支撑件;一个聚焦线圈和一个跟踪线圈,安装在支架上;倾斜线圈,安装在支架一个侧面上,形成驱动物镜倾斜的绕组;一个第一磁体和一个第一磁轭,与聚焦线圈和跟踪线圈的电流共同产生驱动物镜的电磁力;一个第二磁体和一个第二磁轭,与倾斜线圈的电流共同产生驱动物镜的电磁力;一个位置测定传感器,测量物镜相对于光盘的相对倾斜;和一个平衡件,平衡倾斜线圈的重量。

Description

光学头总成
技术领域
本发明涉及一种光学头总成,特别涉及,一种具有为了进行物镜倾斜控制的改进结构的光学头总成。
背景技术
一般来说,象CDP(小型光盘录放机)或DVDP(数字多功能光盘录放机)等的在光盘上记录或从光盘再现信息的光盘录放机,包括一个光学头总成,在跨光盘移动时,通过向光盘发射光和接受从光盘反射的光,记录和再现信息。这个光学头总成通常设有驱动一个支架(bobbin)的控制装置,在这个支架上,包括一个物镜的一个光学系统安装在一个聚焦方向和一个跟踪方向上,进行聚焦和跟踪控制,以致穿过物镜的光能够在光盘上的一个准确的位置上聚焦。近来,要求除了进行聚焦和跟踪控制外还能进行倾斜控制的一种光学头总成。在光盘倾斜时,通过倾斜控制,光学头总成本身能够根据光盘的倾斜而倾斜,使得光与法线相平行地入射到光盘上。
图1示出具有传统的倾斜控制机构的一个光学头总成。如图所示,在传统的倾斜控制机构中,包括一个物镜11的一个光学头总成整体安装在底部20的枢轴21上可枢转。光盘1的倾斜度由传感器12和13测量,然后驱动一个倾斜马达30,将整个光学头总成10倾斜一个相应角度。数码40表示跨光盘1往复移动底部20的一个进给马达。但是,在具有上述结构的倾斜控制机构中,因为光学头总成10是安装成整体枢轴旋转,并且在光学头总成10外附加地安装倾斜马达30,整个糸统大而且复杂,这与使系统变轻变小的当今趋向是相反的。因此,需要一种具有重量轻且小的结构的能够稳定地进行倾斜控制的光学头总成。
发明内容
为了解决上述问题,本发明的目的是提供带有简单结构的能够稳定进行倾斜控制的一种光学头总成。
因此,为达到上述目的,在此提供一种光学头总成,它包括:一个支架,在它上面安装一个物镜;一个弹性支撑件,用于支撑支架使其能够相对于安装在底部上的保持器弹性移动;一个聚焦线圈和一个跟踪线圈,安装在支架上,形成在聚焦方向和跟踪方向驱动物镜的绕组;倾斜线圈,安装在支架一个侧面上,形成驱动物镜倾斜的绕组;一个第一磁体和一个第一磁轭,与聚焦线圈和跟踪线圈上的电流共同产生驱动物镜的电磁力;一个第二磁体和一个第二磁轭,与倾斜线圈上的电流共同产生驱动物镜的电磁力;一个位置测定传感器,测量物镜相对于光盘的相对倾斜;和一个平衡件,与支架耦接,通过在与倾斜线圈的位置相反的对称的位置上,加与倾斜线圈的重量相应的重量,平衡倾斜线圈的重量。
附图说明
通过参照附图的一个优选实施例的详细说明将使本发明的上述目的和优点更明了。
图1是传统的光学头总成的图;
图2是本发明的光学头总成的分解透视图;
图3是除图2中的外罩件以外的组装的光学头总成的透视图;
图4是图2光学头总成的倾斜机构的工作原理图。
具体实施方式
参见图2和3,在本发明的光学头总成中,在底部100上固定安装一个保持器120,并且在上面安装物镜111的一个支架110由弹性支撑件121弹性可移动地支撑在保持器120上。将物镜111在聚焦方向和跟踪方向对准的一个聚焦线圈112和一个跟踪线圈113安装在支架110上。与在聚焦和跟踪线圈112和113上的电流相互磁性作用的一个第一磁体130和一个第一磁轭131安装在底部100上。在图3箭头表示的方向倾斜驱动物镜111的各倾斜线圈114安装在支架110的两个相邻角部上。由于在倾斜线圈114携带的电流和安装在底部100上的第二磁体140和磁轭141之间的相互作用,在箭头所示方向进行枢转,即一个倾斜作用。在此,如图4所示,第二磁体140成对地设置和在彼此相反方向磁化,并且安装在每个磁轭141的上下部分上,向着每个倾斜线圈114的上下部分。
在这状态中,当电流流过倾斜线圈114,根据弗来明左手定则,如图4所示,支架110反时针倾斜。电流在相反方向流动时,支架110顺时针方向倾斜。数码200表示盖住在底部100上安装的支架110和保持器120的各件的外罩件。测量在物镜111和光盘(未示出)之间相对倾斜的第一和第二位置测定传感器201和202安装在外罩件200上。第一位置测定传感器201安装在外罩件200的上外表面上,测量光盘相对于外罩件200的倾斜。第二位置测定传感器202安装在外罩件200的侧面和内表面,测量物镜111相对于外罩件200的倾斜。因此,由传感器201和202测量的各值彼此比较,计算在光盘和物镜111之间的相对倾斜。然后电流加到倾斜线圈114进行倾斜控制。
本发明的一个特征是,在支架110下安装平衡各倾斜线圈114的重量的平衡件300。平衡件300由在支架110底部下的一个底板310和在支架110的各侧面上的侧板320构成。侧板320从底板垂直地伸出,与倾斜线圈对称地位于支架两侧上,将与倾斜线圈114的重量相应的重量加到与倾斜线圈114的位置相对称的位置上。因此,倾斜线圈114的重量由平衡件300的侧板320的重量平衡,以致支架110能够保持在一个平衡状态中。安装平衡件300的原因是因为,当由于倾斜线圈114的重量支架110失去平衡向一个方向倾斜时,在包括聚焦控制、跟踪控制和倾斜控制的整个控制机构上的负荷增加。因此,在安装平衡件300时,保持了支架110的平衡,以致能够稳定地进行上述控制。
平衡件300的侧板320也能够用作测量第二位置测量传感器202倾斜的反射板。
如上所述,在本发明的光学头总成中,因为倾斜控制的结构简单,能够将总成制成体积小轻型的。而且,通过安装平衡件平衡支架重量,能够稳定进行控制。

Claims (2)

1.一种光学头总成,包括:一个在其上安装有一个物镜的支架;一个弹性支撑件,用于支撑支架使其能够相对于底部上的保持器弹性移动;一个聚焦线圈和一个跟踪线圈,安装在支架上,形成在聚焦方向和跟踪方向驱动物镜的绕组;以及一个第一磁体和一个第一磁轭,与聚焦线圈和跟踪线圈的电流共同产生驱动物镜的电磁力,其特征在于:包括安装在支架的两个相邻角部上,形成驱动物镜倾斜的绕组的倾斜线圈;一个第二磁体和一个第二磁轭,与倾斜线圈上的电流共同产生驱动物镜的电磁力;两个位置测定传感器,测量物镜相对于光盘的相对倾斜;和一个平衡件,所述平衡件与支架耦接,在与倾斜线圈的位置对称的位置上加上与倾斜线圈的重量相应的重量,以平衡倾斜线圈的重量。
2.根据权利要求1所述的光学头总成,其中平衡件包括:
一个底板,位于支架的底表面下;和
侧面板,从底板垂直地伸出,与倾斜线圈对称地位于支架两侧上。
CNB001314475A 1999-10-21 2000-10-16 光学头总成 Expired - Fee Related CN1144192C (zh)

Applications Claiming Priority (2)

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KR45847/1999 1999-10-21
KR1019990045847A KR100636103B1 (ko) 1999-10-21 1999-10-21 광픽업 조립체

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CN1294381A CN1294381A (zh) 2001-05-09
CN1144192C true CN1144192C (zh) 2004-03-31

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US (1) US6466529B1 (zh)
EP (1) EP1094453B1 (zh)
JP (1) JP2001134969A (zh)
KR (1) KR100636103B1 (zh)
CN (1) CN1144192C (zh)
DE (1) DE60026672T2 (zh)

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Publication number Publication date
EP1094453B1 (en) 2006-03-15
DE60026672T2 (de) 2006-09-07
KR20010038041A (ko) 2001-05-15
EP1094453A3 (en) 2004-01-14
CN1294381A (zh) 2001-05-09
DE60026672D1 (de) 2006-05-11
EP1094453A2 (en) 2001-04-25
US6466529B1 (en) 2002-10-15
JP2001134969A (ja) 2001-05-18
KR100636103B1 (ko) 2006-10-18

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