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11.发明公开Optical pickup device capable of stable tracking 审中-公开Optische Abtastvorrichtung zum stableen Spurfolgen
公开(公告)号：EP1067531A1
公开(公告)日：2001-01-10
申请号：EP00305675.1
申请日：2000-07-05
发明人： Yoo, Jang-hoon , Cho, Kun-ho , Jung-Seung-tae , Lee, Chul-woo , Seo, Joong-eon , Shin, Dong-ho
CPC分类号： B82Y10/00 , G11B7/08564 , G11B7/1356 , G11B7/139 , G11B11/10543 , G11B11/10576 , G11B2007/13725
摘要： There is provided an optical pickup device having a light source (30) for generating light, a light path changing means for changing the traveling path of incident light, an objective lens (60) for focusing incident light to form a light spot on a recording medium (20), and a photo detecting unit (80) for receiving light reflected from the recording medium (20) and having passed through the objective lens (60) and the light path changing means, the optical pickup device characterized in that the objective lens (60) has an incidence region of a predetermined size, and characterized by comprising a tracking mirror (50) disposed on the light path between the light path changing means and the objective lens (60), for reflecting incident light emitted from the light source (30) so that the light spot traces proper track positions of the recording medium (20); and a lens unit consisting of at least two lenses (35,55) which allow the light reflected from the tracking mirror (50) to be incident on the incidence region (61) of the objective lens (60). Since the optical pickup device performs tracking by adjusting the reflection direction of incident light by means of a tracking mirror (50) with an objective lens (60) fixed, a tracking error signal offset due to movement of the objective lens (60) is not generated, thereby enabling stable tracking.
摘要翻译： 提供一种具有用于产生光的光源（30）的光学拾取装置，用于改变入射光的行进路径的光路改变装置，用于聚焦入射光以在记录上形成光斑的物镜（60） 介质（20）和用于接收从记录介质（20）反射并经过物镜（60）和光路改变装置的光的光检测单元（80），其特征在于， 透镜（60）具有预定尺寸的入射区域，其特征在于包括设置在光路改变装置和物镜（60）之间的光路上的跟踪反射镜（50），用于反射从光发射的入射光 光源（30），使得光斑跟踪记录介质（20）的正确轨道位置; 以及由允许从跟踪反射镜（50）反射的光入射到物镜（60）的入射区域（61）的至少两个透镜（35,55）组成的透镜单元。 由于光学拾取装置通过利用物镜（60）固定的跟踪反射镜（50）调节入射光的反射方向进行跟踪，所以由于物镜（60）的移动引起的跟踪误差信号偏移不是 生成，从而实现稳定跟踪。
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12.发明公开Swing arm driving type optical recording/reproducing apparatus 有权Optisches Aufzeichnungs- /Wiedergabegerätmit Schwenkarmantrieb
公开(公告)号：EP0947983A2
公开(公告)日：1999-10-06
申请号：EP99302309.2
申请日：1999-03-25
发明人： Lee, Yong-hoon , Lee, Chul-woo , Chung, Chong-sam , Cho, Kun-ho
IPC分类号： G11B7/085
CPC分类号： G11B7/122 , G11B7/08576 , G11B7/08594 , G11B7/14 , G11B7/24038
摘要： A swing arm driving type optical recording/reproducing apparatus has a plurality of optical pickups (30,40) each for use with a respective information recording surface (20a,20b) of one or more optical disks (20). The apparatus also comprises a swing member (50) including a mount (51) on which is located a light source (31,41), an optical path changing unit (33,43), and a photodetector (39,49) which form one part of each of the optical pickups (30,40). A plurality of swing arms (52,55) extend from the mount (51) each including a suspension arm (53,56) for elastically biasing a slider (54,57) into contact with the respective information recording surface (20a,20b) of the disk (20), the slider (54,57) carrying an objective lens (37,47) forming the other part of each optical pickup (30,40). A supporting unit (60) is provided for supporting the swing member (50) to be reciprocally rotatable centering around one pivot point, in co-operation with a magnetic driver (70).
摘要翻译： 摇臂驱动型光学记录/再现装置具有多个光拾取器（30,40），每个光拾取器用于与一个或多个光盘（20）的相应的信息记录表面（20a，20b）一起使用。 该装置还包括摆动构件（50），其包括位于其上的光源（31,41）的安装座（51），光路改变单元（33,43）和光电检测器（39,49） 每个光学拾取器（30,40）的一部分。 多个摆臂（52,55）从安装件（51）延伸，每个支架包括悬臂（53,56），用于弹性地偏置滑块（54,57）与相应的信息记录表面（20a，20b）接触， ，所述滑块（54,57）承载形成每个光学拾取器（30,40）的另一部分的物镜（37,47）。 提供支撑单元（60），用于与磁性驱动器（70）协作，支撑摆动构件（50）以一个枢转点为中心往复旋转。
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13.发明公开Objective lens device and optical pickup adopting the same 失效Objektivlinsenvorrichtung und optische Abtastvorrichtung mit derselben
公开(公告)号：EP0805440A1
公开(公告)日：1997-11-05
申请号：EP97300996.2
申请日：1997-02-17
CPC分类号： G11B7/1374 , G11B7/0901 , G11B7/0908 , G11B7/131 , G11B7/1381 , G11B7/13922 , G11B2007/0006
摘要： An objective lens device having two light control surfaces and an optical pickup able to adopt disks having different thicknesses as a recording medium (10) are provided. The objective lens device includes an objective lens (200, 300, 300') arranged along an optical path parallel to the disks (10), and first and second control portions (211, 213, 310, 330, 310', 330') formed either in a light incident surface of the objective lens (300) a light emitting surface of the lens (300') or an extra transparent member (210). Also, the optical pickup includes a light source (250), an optical path converting means (240) placed between the objective lens device (200, 300, 300') and the light source (250) for diverting incident light, and a photodetector (270) for receiving light passing through the objective lens device and the optical path converting means (240) after being reflected from the recording medium (10) to detect an error signal and an information signal. Therefore, two disks having different thicknesses are compatible as a recording medium, and light interference occurring when using a thick disk can be decreased.
摘要翻译： 提供具有两个光控制面的物镜装置和能够采用不同厚度的盘作为记录介质的光拾取器。 物镜装置包括沿着平行于盘（10）的光路布置的物镜（200,300,300'），以及第一和第二控制部分（211,213,310,330,310'，330'）， 在物镜（300）的光入射表面中形成透镜（300'）的发光表面或者额外的透明构件（210）。 另外，光拾取器包括光源（250），放置在物镜装置（200,300,300'）和用于转移入射光的光源（250）之间的光路转换装置（240），以及光电检测器 （270），用于在从记录介质（10）反射之后接收通过物镜装置的光和光路转换装置（240），以检测误差信号和信息信号。 因此，具有不同厚度的两个盘作为记录介质是兼容的，并且可以减少使用厚盘时发生的光干涉。
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14.发明公开Reproducing and recording optical pickup compatible for discs having different thicknesses 失效光学扫描头，用于再现和记录的板厚变化的厚度
公开(公告)号：EP0777221A1
公开(公告)日：1997-06-04
申请号：EP96308733.3
申请日：1996-12-03
发明人： Yoo, Jang-hoon , Chung, Chong-sam , Lee, Chul-woo , Rim, Kyung-hwa , Cho, Kun-ho
CPC分类号： G11B7/1353 , G11B7/0037 , G11B7/0909 , G11B7/131 , G11B7/133 , G11B7/1367 , G11B7/1381 , G11B2007/0006 , G11B2007/13727
摘要： A reproducing/recording optical pickup compatible for discs having different thicknesses includes a transparent plate (2) having a central portion formed with a diffraction grating pattern (3) for diffracting the light travelling from the light source (1) to the objective lens (5), and a transparent portion through which the light passes, and a photodetector (9) having first and second (16, 17) light receiving portions. The zero-order transmitted light and the passing light are focused using all regions of the aperture of the objective lens (5) with respect to a thin disc (6). The positive first-order diffracted light by the diffraction grating pattern (3) of the transparent plate (2) is focused onto a thick disc (7) by partial regions of the objective lens (5). Then, the reflected lights thereof are detected by the first and second light receiving portions (16, 17). Since signals for reproduction and servo for each disc are detected as the detection signals of the first and second light receiving portions (16, 17), stable servo and noiseless reproduction is possible, irrespective of the thickness of the disc used.
摘要翻译： 再现/记录光拾取器兼容于具有不同厚度的光盘包括具有衍射光栅（3）图案来形成用于衍射的光从光源（1）到物镜行进（5中央部的透明板（2） ），以及通过该光通过的透明部分，以及一个光检测器（9），具有第一和第二（16,17）的光接收部分。 零阶反mitted光和通过光所使用的物镜（5）的孔的所有区域相对于聚焦到薄光盘（6）。 由透明板（2）的衍射光栅图案（3）的正一级衍射光通过物镜的部分区域聚焦到厚光盘上（7）（5）。 然后，反射光其由第一和第二光接收部分（16，17）检测到。 由于用于再现和伺服每个光盘信号被检测为第一和第二光接收部分（16，17）的检测信号，稳定的伺服和无噪声的再现是可能的，不论使用的盘的厚度的。
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15.发明公开High-density recording method for hard disk drives and a pre-amplifier circuit suitable for use with same 有权记录方法，用于硬盘驱动器和前置放大器本的高记录密度
公开(公告)号：EP1830350A3
公开(公告)日：2008-11-05
申请号：EP07101683.6
申请日：2007-02-02
发明人： Lee, Chul-woo
CPC分类号： G11B5/012 , G11B20/1492 , G11B2005/0002 , G11B2220/2516
摘要： A magnetic recording method is provided where ternary data is recorded on a magnetic recording medium by forming a first area (52;62) that corresponds to a first value of the data and in which a first magnetization state is continued at least during the minimum write width. A second area (54;64) that corresponds to a second value of the data in which a second magnetization state is oppositely magnetized as compared with the first magnetization state is continued at least during the minimum write width. A third area (66) that corresponds to a third value of the data in which the magnetic intensity detected by the read head corresponds to a "0". Accordingly, the ternary data can be recorded using the characteristic that a signal having a width narrower than the detection width of the read head is not detected by the read head. The third area (66) is recorded by a high frequency signal generator generating a high frequency signal having a higher frequency than a write frequency corresponding to the minimum write width.
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公开(公告)号：EP1391893B1
公开(公告)日：2007-10-17
申请号：EP03018568.0
申请日：2003-08-18
发明人： Shin, Sang-chul , Jeong, Woo-cheol , Lee, Chul-woo
IPC分类号： G11B33/08
CPC分类号： G11B33/08
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17.发明授权
公开(公告)号：EP1028412B1
公开(公告)日：2007-05-09
申请号：EP99310505.5
申请日：1999-12-23
发明人： Chung, Chong-sam , Ahn, Young-man , Kim, Tae-kyung , Suh, Hea-jung , Jung, Seung-tae , Lee, Chul-woo , Park, In-sik , Shin, Dong-ho
CPC分类号： G11B7/131 , G11B7/005 , G11B7/1353 , G11B7/1381
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公开(公告)号：EP0944048B1
公开(公告)日：2006-08-23
申请号：EP99301942.1
申请日：1999-03-15
发明人： Chung, Chong-sam , Lee, Chul-woo , Park, In-sik
IPC分类号： G11B7/095
CPC分类号： G11B7/0938 , G11B7/007 , G11B7/00745 , G11B7/0956 , G11B7/24085
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公开(公告)号：EP0780840B1
公开(公告)日：2003-05-28
申请号：EP96309375.2
申请日：1996-12-20
发明人： Lee, Chul-woo , Yoo, Jang-hoon
IPC分类号： G11B7/135
CPC分类号： G11B7/1353 , G11B7/131 , G11B7/1374 , G11B7/139 , G11B2007/0006 , G11B2007/13727
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公开(公告)号：EP1076333A3
公开(公告)日：2003-03-26
申请号：EP00306730.3
申请日：2000-08-07
发明人： Yoo, Jang-hoon , Cho, Kun-ho , Lee, Yong-hoon , Kim, Seok-jung , Jung, Seung-tae , Lee, Chul-woo , Seo, Joong-eon
CPC分类号： G11B7/1353 , G11B7/0956
摘要： An optical pickup device includes a light source (35) for generating and emitting light, optical path changing means (50) for changing a proceeding path of incident light, an objective lens (70) for focusing incident light on a recording medium (30) which has a recording surface (31) where information is recorded and a protection layer (33), at the side where light is input, for protecting the recording surface (31), a main photodetector (81) for detecting the information signal and/or an error signal by receiving the light reflected by the recording surface (31) of the recording medium (30) and passing through the objective lens (70) and the optical path changing means (50), and an inclination detecting unit for detecting inclination of the recording medium (30) by receiving the light emitted from the light source (35) and reflected by the surface of the protection layer (33) or the recording surface (31) of the recording medium (30). Thus, since the inclination of the recording medium (30) is detected using the light emitted from the light source (35) and reflected by the surface of the protection layer (33) or the recording surface (30), of the recording medium, without an additional tilt sensor, the number of parts is reduced and the structure of the device is simplified.
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