公开(公告)号：US5715102A

公开(公告)日：1998-02-03

申请号：US778350

申请日：1997-01-03

申请人： Zu-Wen Chao ,  Tsung-Ming Yang ,  Jau-Jiu Ju ,  Shin-Ter Tsai

发明人： Zu-Wen Chao ,  Tsung-Ming Yang ,  Jau-Jiu Ju ,  Shin-Ter Tsai

IPC分类号： G02B27/09 ,  G11B7/135 ,  G02B5/04

CPC分类号： G02B27/0972 ,  G02B27/09 ,  G02B27/0911 ,  G02B27/0977 ,  G11B7/1359 ,  G11B7/1362 ,  G11B7/1398

摘要： A beam shaper device for an optical read/write head on an optical disc drive is provided. This beam shaper device is particularly useful for shaping a laser beam originally emitted with an elliptical cross section, into having a substantially circular cross section. The beam shaper device includes only one prism and one plane mirror. The shape of the prism and the orientation of the plane mirror are specifically devised in such a way as to allow the output beam shaper device to have a circular cross section and to have its propagation axis orthogonal to that of the input laser beam.

摘要翻译： 提供了一种用于在光盘驱动器上的光读/写头的光束整形器装置。 该光束整形器装置特别适用于将原来以椭圆形横截面发射的激光束成形为具有基本上圆形的横截面。 光束整形器装置仅包括一个棱镜和一个平面镜。 棱镜的形状和平面镜的取向特别设计成使得输出光束整形器具有圆形横截面并使其传播轴与输入激光束的轴正交。

公开(公告)号：US20060140071A1

公开(公告)日：2006-06-29

申请号：US11188904

申请日：2005-07-26

申请人： Yu-Tasang Hwang ,  Zu-Wen Chao

发明人： Yu-Tasang Hwang ,  Zu-Wen Chao

IPC分类号： G11B7/00

CPC分类号： G11B7/1374

摘要： The present invention relates to an objective lens optical part for an optical pickup device and a focusing method using the same. The focusing method at least includes the steps of providing a first optical member and a second optical member corresponding to the first optical member, dividing a light source into a first optical beam and a second optical beam via the first optical member and the second optical member, and applying a random dithering mechanism to the second optical beam, such that respective pickup optical spot and tracking optical spot can be achieved, wherein the pickup spot picks up more data and the tracking optical spot facilitates tracking operation, thus improving tracking and accuracy of the picked up data.

摘要翻译： 本发明涉及一种用于光学拾取装置的物镜光学部件和使用该物镜的聚焦方法。 聚焦方法至少包括以下步骤：提供对应于第一光学构件的第一光学构件和第二光学构件，通过第一光学构件和第二光学构件将光源分成第一光束和第二光束 并且对第二光束施加随机抖动机制，使得可以实现各个拾取光点和跟踪光点，其中拾取点拾取更多数据，并且跟踪光点有助于跟踪操作，从而提高跟踪和精度 拾取数据。

公开(公告)号：US06343059B1

公开(公告)日：2002-01-29

申请号：US09376669

申请日：1999-08-16

申请人： Yuan-Chin Lee ,  Zu-Wen Chao

发明人： Yuan-Chin Lee ,  Zu-Wen Chao

IPC分类号： G11B712

CPC分类号： G11B7/1359

摘要： This invention concerns a reading-writing pickup head for data access on optical record media. The pickup head of the present invention includes a birefringent prism and a quarter-wave plate where the birefringent prism is made of double-refraction material with different refraction indices on different polarizations, and it is used to split the incident and reflection beams of the pickup head. According to the present invention, the prism and the polarized beam splitter of a pickup head of the related art are replaced with the birefringent prism. Consequently, the number of optical elements of the pickup head according to the present invention is reduced.

摘要翻译： 本发明涉及用于在光学记录介质上进行数据访问的读写头拾取头。 本发明的拾取头包括双折射棱镜和四分之一波长板，其中双折射棱镜由不同折射率的不同折射率的双折射材料制成，并且用于将拾取器的入射和反射光束分离 头。 根据本发明，现有技术的拾取头的棱镜和偏振分束器被双折射棱镜代替。 因此，根据本发明的拾取头的光学元件的数量减少。

公开(公告)号：US5278811A

公开(公告)日：1994-01-11

申请号：US909778

申请日：1992-07-07

申请人： Zu-Wen Chao

发明人： Zu-Wen Chao

IPC分类号： G11B11/105 ,  G11B11/00

CPC分类号： G11B11/10543

摘要： A magneto-optic reading apparatus includes a laser light source for generating a linearly polarized light beam and a quarter-wave plate which converts the linearly polarized light beam into a circularly polarized light beam. A beam splitter separates the circularly polarized light beam into a first beam which passes therethrough and a second beam which is reflected. An objective lens converges the first beam so as to scan one of the data tracks of a magneto-optic recording element. The information written along the scanned data track causes the polarization of the first beam to be modulated as the first beam is reflected by the recording element toward the first beam splitter. The first beam splitter further separates the first beam into a third beam which passes therethrough and a fourth beam which is reflected. The quarter-wave plate converts the third beam into a linearly polarized light beam which has a polarization that is substantially transverse to the polarization of the light beam from the laser light source. A polarizing beam splitter prevents the third beam from reaching the laser light source. An optical signal detecting system receives the fourth beam from the first beam splitter and generates a magnetization signal corresponding to the information along the scanned data track.

摘要翻译： 磁光读取装置包括用于产生线偏振光束的激光光源和将线偏振光束转换为圆偏振光束的四分之一波片。 分束器将圆偏振光束分离成通过其中的第一光束和被反射的第二光束。 物镜会聚第一光束以扫描磁光记录元件的数据轨道之一。 沿着扫描的数据轨道写入的信息导致当第一光束被记录元件朝向第一分束器反射时，第一光束的偏振被调制。 第一分束器进一步将第一光束分离成通过其中的第三光束和被反射的第四光束。 四分之一波片将第三光束转换为线偏振光束，其具有基本上横向于来自激光光源的光束的偏振的偏振。 偏振分束器防止第三光束到达激光光源。 光信号检测系统接收来自第一分束器的第四光束，并产生对应于扫描数据轨迹的信息的磁化信号。

公开(公告)号：US5745465A

公开(公告)日：1998-04-28

申请号：US786330

申请日：1997-01-23

申请人： Shin-Ter Tsai ,  Zu-Wen Chao

发明人： Shin-Ter Tsai ,  Zu-Wen Chao

IPC分类号： G11B7/00 ,  G11B7/135

CPC分类号： G11B7/1378 ,  G11B7/1369 ,  G11B7/13922 ,  G11B2007/0006

摘要： A digital video disc optical pick-up head system has a laser light source, a beam splitter, a collimating len, a polarization changer, a deflecting mirror, an optical crystal assembly, an objective len and a photosensor assembly. These optical components together constitute an optical pick-up head system that generates only a single focus at any one time. When an alternative focus is required, polarized light of an alternative polarization is used for generating a detectable opto-electrical signal for the photosensor.

摘要翻译： 数字视盘光学拾取头系统具有激光光源，分束器，准直灯，偏光改变器，偏转镜，光学晶体组件，物镜和光电传感器组件。 这些光学部件一起构成在任何一个时刻仅产生单个焦点的光学拾取头系统。 当需要替代焦点时，使用替代极化的偏振光来产生用于光电传感器的可检测的光电信号。

公开(公告)号：US5438386A

公开(公告)日：1995-08-01

申请号：US175642

申请日：1993-12-30

申请人： Zu-Wen Chao

发明人： Zu-Wen Chao

IPC分类号： G02B7/28 ,  G03B13/36 ,  G03B13/02

CPC分类号： G02B7/28

摘要： A coaxial master-slave lens system is provided. The coaxial master-slave lens system can be either fixed-focus type or zoom type, and can be equipped to any camera equipment. In such a coaxial master-slave lens system, a slave lens is provided as an additional attachment to the master lens. The slave lens is provided with a center hollowed portion for accommodating the master lens in such a manner that the slave optical axis is in coincidence with the master optical axis; the slave front lens plane is in coincidence with the master front lens plane; the slave rear lens plane is in coincidence with the master rear lens plane; the slave front focus point is in coincidence with the master front focus point; and the slave rear focus point is in coincidence with the master rear focus point.

摘要翻译： 提供同轴主从透镜系统。 同轴主从镜头系统可以是固定焦距型或变焦型，可以配备任何相机设备。 在这种同轴主从透镜系统中，作为与主透镜的附加附件提供从镜头。 从镜头设置有中心空心部分，用于容纳主镜片，使得从光轴与主光轴重合; 从前镜头平面与主镜头平面重合; 从属后透镜平面与主后透镜平面重合; 从动前焦点与主前焦点重合; 从机后焦点与主后焦点重合。

公开(公告)号：US06370104B1

公开(公告)日：2002-04-09

申请号：US09376668

申请日：1999-08-16

申请人： Zu-Wen Chao ,  Yuan-Chin Lee

发明人： Zu-Wen Chao ,  Yuan-Chin Lee

IPC分类号： G11B712

CPC分类号： G11B7/127 ,  G02B27/283 ,  G11B7/004 ,  G11B7/1356 ,  G11B7/1365 ,  G11B7/1374 ,  G11B2007/0006

摘要： This invention relates to a DVD reading-writing pickup head employing multiple wavelengths for data access on an optical record medium. With the configuration of the pickup head of the present invention, the number of the used optical elements is minimized. The pickup head of the present invention includes a cemented birefringent prism, a plurality of objective lenses, quarter-wavelength plates and laser sources and a photo detector. The cemented birefringent prism is used to refract the laser beams generated by the laser sources into an incident branch and split the laser beams and a reflected branch reflected from the optical record medium.

摘要翻译： 本发明涉及一种在光学记录介质上采用多个波长进行数据存取的DVD读写头拾取头。 利用本发明的拾取头的结构，所使用的光学元件的数量被最小化。 本发明的拾取头包括胶合双折射棱镜，多个物镜，四分之一波长板和激光源以及光电检测器。 胶结双折射棱镜用于将由激光源产生的激光束折射成入射分支，并将激光束和从光学记录介质反射的反射分支分开。

公开(公告)号：US5748602A

公开(公告)日：1998-05-05

申请号：US763437

申请日：1996-12-11

申请人： Zu-Wen Chao ,  Tsung-Ming Yang ,  Shin-Ter Tsai ,  Jau-Jiu Ju ,  Pei-Yih Liu

发明人： Zu-Wen Chao ,  Tsung-Ming Yang ,  Shin-Ter Tsai ,  Jau-Jiu Ju ,  Pei-Yih Liu

IPC分类号： G11B7/00 ,  G11B7/135

CPC分类号： G11B7/1369 ,  G11B2007/0006

摘要： A single-lens optical pick-up head has a laser diode, a beam splitter, a collimator, a polarizing light converter, a polarization controller, a polarizing beam splitter, a first quarter-wavelength plate, a mirror, a second quarter-wavelength plate, a convex mirror, an objective lens and a photodetector, for use in accessing DVD and CD discs by switching its optical property between two states.

摘要翻译： 单透镜光学拾取头具有激光二极管，分束器，准直仪，偏振光转换器，偏振控制器，偏振光束分离器，第一四分之一波长板，反射镜，第二四分之一波长 板，凸面镜，物镜和光电检测器，用于通过在两种状态之间切换其光学性质来访问DVD和CD光盘。

公开(公告)号：US5748574A

公开(公告)日：1998-05-05

申请号：US843471

申请日：1997-04-16

申请人： Zu-Wen Chao

发明人： Zu-Wen Chao

IPC分类号： G11B7/135 ,  G11B11/105 ,  G11B7/00

CPC分类号： G11B7/1353 ,  G11B11/10543

摘要： A double focal-point magneto-optic pick-up head is provided. This magneto-optic pick-up head reads data from an optical disc by using a diffraction grating to diffract a laser beam into two diffracted beams of equal intensity which are focused on the optical disc at two focal points. One focal point is pinpointed on one groove portion of the optical disc, and the other focal point is pinpointed on one neighboring land portion of the same. This allows the two reflected beams to have a difference in propagation length equal to twice the depth of the land portion. The reflected beams are subsequently diffracted again by the diffraction grating into four beams, two of which are directed to interfere with each other to thereby produce an interference beam representative of a read signal from the optical disc. Since the depth is fixed by manufacture, the difference in propagation length between the two reflected beams from the two focal points on the optical disc can always be maintained at a constant. The interference between the two beams for the read signal is thus precise, allowing the output data from the magneto-optic pick-up head to be reliable.

摘要翻译： 提供双焦点磁光拾取头。 该磁光拾取头通过使用衍射光栅从光盘读取数据，以将激光束衍射成两个相等强度的衍射光束，其聚焦在两个焦点上的光盘上。 一个焦点被精确地定位在光盘的一个凹槽部分上，另一个焦点被精确地定位在该光盘的一个相邻的陆部上。 这允许两个反射光束的传播长度差等于接地部分的深度的两倍。 反射光束随后被衍射光栅再次衍射成四个光束，其中两个光束相互干涉，从而产生表示来自光盘的读取信号的干涉光束。 由于深度通过制造固定，所以来自光盘上的两个焦点的两个反射光束之间的传播长度差可以始终保持恒定。 因此，用于读取信号的两个光束之间的干涉是精确的，允许来自磁光拾取头的输出数据是可靠的。

公开(公告)号：US5712843A

公开(公告)日：1998-01-27

申请号：US774361

申请日：1996-12-27

申请人： Zu-Wen Chao ,  Jau-Jiu Ju

发明人： Zu-Wen Chao ,  Jau-Jiu Ju

IPC分类号： G11B7/12 ,  G11B7/13 ,  G11B7/135 ,  G11B11/105 ,  G11B7/00

CPC分类号： G11B7/1356 ,  G11B7/123 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/1365 ,  G11B11/10543

摘要： A miniature optical head for optical disk drive units is disclosed. The head assembly comprises a polarization light-splitter means having a block-shaped body. A laser light source generates a laser light beam at a predetermined wavelength and illuminating into the block body of the polarization light-splitter means. A first quarter-wavelength light plate means arranged at a side surface of the block-shaped body of the polarizing light-splitter means is placed opposite the laser light source. A reflective diffraction grating arranged further external to the first quarter-wavelength light plate means is used for reflectively diffracting the laser light beam. A second quarter-wavelength light plate means is arranged to a surface of the block-shaped polarizing light-splitter means in a plane perpendicular to the first quarter-wavelength light plate means. A holographic optical element is arranged on a side surface of the block-shaped body opposite the second quarter-wavelength light plate means. A light sensor array is arranged further next to the holographic optical element along the path of the light beams returned by the surface of the optical disk being accessed, the returning light beams being received by the array for detecting data conveyed therein. The physical dimensioning of the optical head is suitable for head assembly miniaturization, the light energy involved in the data access operation is used without substantial loss and the light source is free from feedback noise.

摘要翻译： 公开了一种用于光盘驱动单元的微型光学头。 头组件包括具有块状体的偏振光分离器装置。 激光源产生预定波长的激光束并照射到偏振光分离装置的块体中。 布置在偏振光分离装置的块状体的侧面的第一四分之一波长的光板装置设置在与激光光源相对的位置。 在第一四分之一波长的光板装置的外侧布置的反射衍射光栅被用于反射衍射激光束。 第二四分之一波长的光板装置在垂直于第一四分之一波长的光板装置的平面中布置在块状偏振光分离装置的表面上。 全息光学元件布置在与第二四分之一波长的光板装置相对的块状体的侧表面上。 光传感器阵列沿着被所访问的光盘的表面返回的光束的路径进一步布置在全息光学元件的旁边，返回的光束被阵列接收，用于检测在其中传送的数据。 光头的物理尺寸适用于头部组件的小型化，使用数据存取操作所涉及的光能没有实质的损耗而光源没有反馈噪声。