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：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：US5905707A

公开(公告)日：1999-05-18

申请号：US798765

申请日：1997-02-11

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

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

IPC分类号： G11B7/00 ,  G11B7/135

CPC分类号： G11B7/1374 ,  G11B7/1353 ,  G11B7/1398 ,  G11B2007/0006

摘要： A grating pattern for a bifocal optical pick-up head assembly of an optical compact disc drive device is disclosed. The device is capable of accessing data on the surface of compact discs arranged in either the DVD or the CD formats. The optical head assembly has an optical system that includes a grating plate and an objective, wherein the grating plate contains the grating pattern, and the objective focuses a light beam onto the data surface of the accessed compact disc. The grating pattern includes a first region that contains no grating and a second region that contains grating. The first region substantially surrounds the second region. The light beam that passes through the first region of the grating pattern is incident to the cross-sectional aperture of the objective for the DVD format of the accessed optical disk. The light beam that passes through the second region of the grating pattern is incident to the cross-sectional aperture of the objective for the CD format of the accessed optical disk.

摘要翻译： 公开了一种用于光盘驱动装置的双焦点光学拾取头组件的光栅图案。 该设备能够访问以DVD格式或CD格式布置的光盘表面上的数据。 光学头组件具有包括光栅板和物镜的光学系统，其中光栅板包含光栅图案，并且该物镜将光束聚焦到所访问的光盘的数据表面上。 光栅图案包括不包含光栅的第一区域和包含光栅的第二区域。 第一区域基本上围绕第二区域。 穿过光栅图案的第一区域的光束入射到物镜的横截面光圈，用于所访问的光盘的DVD格式。 通过光栅图案的第二区域的光束入射到物镜的横截面孔，用于所访问的光盘的CD格式。

公开(公告)号：US5974020A

公开(公告)日：1999-10-26

申请号：US946835

申请日：1997-10-08

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

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

IPC分类号： G11B7/00 ,  G11B7/125 ,  G11B7/135

CPC分类号： G11B7/1353 ,  G11B7/127 ,  G11B7/1356 ,  G11B7/1362 ,  G11B7/1365 ,  G11B7/1378 ,  G11B7/13922 ,  G11B2007/0006

摘要： A two-wavelength laser pick-up head used for accessing DVD, CD, CD-R and CD-E systems. The two-wavelength laser pick-up head includes a shorter wavelength laser optical path for reading the data from a DVD system, and a longer wavelength laser optical path for reading the data from a CD or CD-R system. The above two optical paths use the same collimator and the same objective lens. There is a compensator lens which is used in the longer wavelength laser optical path for correcting the spherical aberration due to the thick substrate of the CD or CD-R.

摘要翻译： 用于访问DVD，CD，CD-R和CD-E系统的双波长激光拾取头。 双波长激光拾取头包括用于从DVD系统读取数据的较短波长激光光路和用于从CD或CD-R系统读取数据的较长波长的激光光路。 上述两个光路使用相同的准直器和相同的物镜。 存在用于更长波长激光光路中用于校正由于CD或CD-R的厚衬底引起的球面像差的补偿透镜。

公开(公告)号：US6064637A

公开(公告)日：2000-05-16

申请号：US9303

申请日：1998-01-20

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

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

IPC分类号： G11B7/00 ,  G11B7/09 ,  G11B7/13 ,  G11B7/135

CPC分类号： G11B7/1381 ,  G11B7/131 ,  G11B7/133 ,  G11B7/1378 ,  G11B2007/0006 ,  G11B7/0901 ,  G11B7/0908 ,  G11B7/0916

摘要： A focusing and tracking method and system for use on the read/write head of an optical drive is provided. The focusing and tracking method and system is capable of detecting both the focusing error and the tracking error of the read/write head to thereby control the focusing and tracking of the same during read operation. In particular, this focusing and tracking method and system combines the use of a knife-edge focusing method and a push-pull tracking method respectively for focusing and tracking of the read/write head. A specially designed photo detector is used to obtain both the focusing error signal and the tracking error signal. This allows the focusing and tracking system to be simplified in structural complexity, thereby saving manufacturing cost. Moreover, since the focusing error signal and the tracking error signal are obtained respectively in perpendicular directions, the undesired effect of cross-talk between the two error signals can be avoided.

摘要翻译： 提供了一种用于光驱的读/写头的聚焦跟踪方法和系统。 聚焦跟踪方法和系统能够检测读/写头的聚焦误差和跟踪误差，从而在读操作期间控制其对焦和跟踪。 特别地，该聚焦跟踪方法和系统分别结合使用刀刃聚焦方法和推挽跟踪方法，用于聚焦和跟踪读/写头。 专门设计的光电检测器用于获得聚焦误差信号和跟踪误差信号。 这使得聚焦和跟踪系统在结构复杂性上得到简化，从而节省制造成本。 此外，由于分别在垂直方向上获得聚焦误差信号和跟踪误差信号，所以可以避免两个误差信号之间串扰的不期望的影响。

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：US06549504B2

公开(公告)日：2003-04-15

申请号：US10083139

申请日：2002-02-27

申请人： Chin-Sung Liu ,  Shin-Ter Tsai

发明人： Chin-Sung Liu ,  Shin-Ter Tsai

IPC分类号： G11B700

CPC分类号： G11B7/1374 ,  G11B7/127 ,  G11B7/13925 ,  G11B2007/0006

摘要： A dual optical pick-up head for accessing CD, CD-R and DVD discs is provided. The provided dual optical pick-up head uses an objective lens and a laser source for DVD discs, and uses another objective lens and another laser source for CD and CD-R discs. Spirit of the invention is that both objective lenses are located in the same lenses holder which connect to a guide rod, and the lenses hold moves only along a radius of the corresponding disc. Moreover, the laser beam produced by any laser source is transmitted through corresponding objective lens to a disc, and the reflected laser beam is transmitted through corresponding objective lens to a PDIC and then a spot is formed and detected. Hence, the location of each objective lens must satiate the requirement that any spot that corresponds to a specific track of disc does not mix with other spots that correspond to other track of disc.