公开(公告)号：US07620098B2

公开(公告)日：2009-11-17

申请号：US10995096

申请日：2004-11-24

申请人： Een Kee Hong ,  Jin Woong Cho ,  Sung Jin Kang ,  Dae Ki Hong ,  Yong Seong Kim ,  Min Chul Ju ,  Sung Pil Kim ,  Myoung Jin Kim

发明人： Een Kee Hong ,  Jin Woong Cho ,  Sung Jin Kang ,  Dae Ki Hong ,  Yong Seong Kim ,  Min Chul Ju ,  Sung Pil Kim ,  Myoung Jin Kim

IPC分类号： H04B1/69

CPC分类号： H04L27/2278 ,  H04B1/707 ,  H04B2201/70706 ,  H04J13/0048 ,  H04J13/0077

摘要： Disclosed is a demodulation method for enhancing decoding performance of information bits in a constant-amplitude multi-code biorthogonal modulation communication system, which performs encoding to cause the level of a transmission symbol to be constant.

摘要翻译： 公开了一种在恒定幅度多码双正交调制通信系统中增强信息比特的解码性能的解调方法，该系统进行编码以使发送码元的电平恒定。

公开(公告)号：US07844151B2

公开(公告)日：2010-11-30

申请号：US12366042

申请日：2009-02-05

申请人： Byeong Ha Lee ,  Myoung Jin Kim

发明人： Byeong Ha Lee ,  Myoung Jin Kim

IPC分类号： G02B6/44

CPC分类号： G02B6/105 ,  G02B6/274 ,  G02B6/2766

摘要： The invention discloses an in-line polarization-state converter. In the polarization converter, a laser beam is radiated onto the side of a photosensitive optical fiber. The laser beam causes the refractive index of an optical fiber core to asymmetrically vary. Birefringence is induced in a core mode of the optical fiber by the variation in the asymmetrical refractive index. An optical fiber segment having the birefringence is generally disposed on a waveguide path of the optical fiber to change the polarization state of an optical signal passing through the optical fiber segment. That is, the phase of the optical signal passing through the optical fiber is changed by radiation of laser beams, which results in a variation in polarization state. The polarization converter disposed on the waveguide path is covered with a metal tube in order to prevent the polarization converter from being bent or broken. In addition, optical fiber connectors are provided at both ends of the polarization converter for easy connection.

摘要翻译： 本发明公开了一种在线偏振态转换器。 在偏振转换器中，将激光束照射到光敏光纤侧。 激光束使光纤芯的折射率不对称地变化。 通过不对称折射率的变化在光纤的纤芯模式中诱发双折射。 具有双折射率的光纤段通常设置在光纤的波导路径上，以改变通过光纤段的光信号的偏振状态。 也就是说，通过光纤的光信号的相位被激光束的辐射改变，这导致极化状态的变化。 设置在波导路径上的偏振转换器被金属管覆盖，以防止偏振转换器弯曲或破裂。 此外，在偏振转换器的两端设有光纤连接器，便于连接。

公开(公告)号：US20080112664A1

公开(公告)日：2008-05-15

申请号：US11938235

申请日：2007-11-09

申请人： Byeong Ha Lee ,  Myoung Jin Kim

发明人： Byeong Ha Lee ,  Myoung Jin Kim

IPC分类号： G02F1/035

CPC分类号： G02B6/105 ,  G02B6/274 ,  G02B6/2766

摘要： The invention discloses an in-line polarization-state converter. In the polarization converter, a laser beam is radiated onto the side of a photosensitive optical fiber. The laser beam causes the refractive index of an optical fiber core to asymmetrically vary. Birefringence is induced in a core mode of the optical fiber by the variation in the asymmetrical refractive index. An optical fiber segment having the birefringence is generally disposed on a waveguide path of the optical fiber to change the polarization state of an optical signal passing through the optical fiber segment. That is, the phase of the optical signal passing through the optical fiber is changed by radiation of laser beams, which results in a variation in polarization state. The polarization converter disposed on the waveguide path is covered with a metal tube in order to prevent the polarization converter from being bent or broken. In addition, optical fiber connectors are provided at both ends of the polarization converter for easy connection.

摘要翻译： 本发明公开了一种在线偏振态转换器。 在偏振转换器中，将激光束照射到光敏光纤侧。 激光束使光纤芯的折射率不对称地变化。 通过不对称折射率的变化在光纤的纤芯模式中诱发双折射。 具有双折射率的光纤段通常设置在光纤的波导路径上，以改变通过光纤段的光信号的偏振状态。 也就是说，通过光纤的光信号的相位被激光束的辐射改变，这导致极化状态的变化。 设置在波导路径上的偏振转换器被金属管覆盖，以防止偏振转换器弯曲或破裂。 此外，在偏振转换器的两端设有光纤连接器，便于连接。

公开(公告)号：US06556743B2

公开(公告)日：2003-04-29

申请号：US09842096

申请日：2001-04-26

申请人： Myoung Jin Kim ,  Young Min Im

发明人： Myoung Jin Kim ,  Young Min Im

IPC分类号： G02B628

CPC分类号： G02B6/29364 ,  G02B6/2937 ,  G02B6/29383 ,  H04J14/0206 ,  H04J14/0209 ,  H04J14/0212 ,  H04J14/0213 ,  H04Q11/0005 ,  H04Q2011/0009 ,  H04Q2011/0024 ,  H04Q2011/0026

摘要： The present invention provides an optical signal add/drop apparatus comprising: an optical signal multiplexing/demultiplexing portion comprising a plurality of 2×2 channel unit devices which are arranged in a straight line and having first and second dual-core ferrules having two optical fibers disposed to be symmetrical to each other at an identical distance from an optical axis for transmitting optical signals, a wavelength division filter disposed between first and second lenses for selectively transmitting or reflecting only the optical signals having specific wavelengths, first and second grin lenses for collimating or focusing the optical signal transmitted or reflected from said wavelength division filter and then transmitting the signal to the first and second dual-core optical fibers; and a switch module having unit 2×2 switches connected to two optical fibers of the second dual-core ferrule of each of the unit devices of said optical signal multiplexing/demultiplexing portion; wherein the switch module can drop simultaneously the optical signals demultiplexed on each of the unit devices or transmit them to the output channels continuously according to the connection state of each of 2×2 switches of the switch modules and then transmit them to output channels through each of the unit devices when the optical signals are added.

摘要翻译： 本发明提供了一种光信号分插装置，包括：光信号复用/解复用部分，包括多个2×2通道单元器件，它们设置成直线，并具有第一和第二双芯套圈，其具有两个光纤， 在与用于传输光信号的光轴相同的距离处彼此对称;布置在第一和第二透镜之间的波长分割滤光器，用于仅选择性地仅发射或反射具有特定波长的光信号，用于准直或聚焦的第一和第二微光透镜 所述光信号从所述波分解滤波器发送或反射，然后将信号发送到第一和第二双芯光纤; 以及开关模块，其具有连接到所述光信号复用/解复用部分的每个单元设备的第二双芯套管的两个光纤的单元2x2开关; 其中开关模块可以同时丢弃在每个单元装置上解复用的光信号，或者根据开关模块的2×2个开关的连接状态将它们连续传输到输出通道，然后通过每个 添加光信号时的单元设备。

公开(公告)号：US5940434A

公开(公告)日：1999-08-17

申请号：US911398

申请日：1997-08-14

申请人： Dong Wook Lee ,  Hun Lee ,  Myoung Jin Kim

发明人： Dong Wook Lee ,  Hun Lee ,  Myoung Jin Kim

IPC分类号： H04L27/20 ,  H04B1/707 ,  H04B14/00 ,  H04J11/00 ,  H04J13/00 ,  H04J13/18 ,  H04L27/34

CPC分类号： H04J13/0022 ,  H04B1/707

摘要： In a direct sequence spread spectrum communications system wherein user binary information symbols are spread spectrum modulated and transmitted to the other party, a non-coherent Walsh QPSK and a coherent Walsh QPSK modulation methods, wherein the PN spreading sequences for inphase and quadrature data in a conventional QPSK PN modulation scheme are coded by Walsh sequences indexed by a special rule to reduce the envelope variation of the transmitted signal, can reduce the envelope variation of transmit signal. And, in a direct sequence spread spectrum communications system wherein several user binary information symbols are spread spectrum modulated, the information symbols of each user are covered by user-specified different Walsh codes and transmitted to the other party, a QPSK modulation methods, wherein the polarity of quadrature PN spreading sequence of a user is controlled by a system controller to make the number of users using the quadrature PN sequence equal to that of users using NOT of the sequence, can reduce the envelope variation of transmit signal.

摘要翻译： 在其中用户二进制信息符号被扩频调制并发送给另一方的直接序列扩频通信系统中，非相干沃尔什QPSK和相干沃尔什QPSK调制方法，其中在一个或多个相位中的同相和正交数据的PN扩展序列 传统的QPSK PN调制方案是由特殊规则索引的沃尔什序列编码，以减少发射信号的包络变化，可以减少发射信号的包络变化。 并且，在其中若干用户二进制信息符号被扩频调制的直接序列扩频通信系统中，每个用户的信息符号被用户指定的不同的沃尔什码覆盖并发送给另一方，QPSK调制方法，其中 用户的正交PN扩展序列的极性由系统控制器控制，使得使用正交PN序列的用户的数量等于使用NOT的序列的用户的数量，可以减少发送信号的包络变化。

公开(公告)号：US09197774B2

公开(公告)日：2015-11-24

申请号：US12109626

申请日：2008-04-25

申请人： Yong Kon Jo ,  Myoung Jin Kim ,  Heung Kyu Jang

发明人： Yong Kon Jo ,  Myoung Jin Kim ,  Heung Kyu Jang

IPC分类号： G03G15/00 ,  H04N1/00

CPC分类号： H04N1/00519 ,  G03G15/00 ,  G03G15/605 ,  G03G2221/1654 ,  H04N1/00 ,  H04N1/00554 ,  H04N1/00596 ,  H04N2201/0091 ,  H04N2201/0094 ,  Y10T70/50

摘要： An image forming apparatus having an automatic document feeding unit so as to successively read documents is disclosed. The image forming apparatus includes an image forming unit to form an image on a printing medium, an image reading unit pivotally coupled to an upper portion of the image forming unit to expose and shield a top of the image forming unit, an automatic document feeding unit pivotally coupled to an upper portion of the image reading unit to expose and shield a top of the image reading unit, and a locking device to selectively expose any one of the top of the image forming unit and the top of the image reading unit. Since the locking device prevents the top of the image forming unit and the top of the image reading unit from being simultaneously exposed, the automatic document feeding unit can be prevented from being damaged due to the simultaneous exposure of the top of the image forming unit and the top of the image reading unit.

摘要翻译： 公开了一种具有自动文件馈送单元以便连续读取文档的图像形成装置。 图像形成装置包括：图像形成单元，用于在打印介质上形成图像;图像读取单元，其可枢转地联接到图像形成单元的上部，以暴露和屏蔽图像形成单元的顶部;自动文件馈送单元 枢转地联接到图像读取单元的上部以暴露和屏蔽图像读取单元的顶部;以及锁定装置，用于选择性地暴露图像形成单元的顶部和图像读取单元的顶部中的任一个。 由于锁定装置防止图像形成单元的顶部和图像读取单元的顶部同时暴露，所以可以防止自动文件馈送单元由于图像形成单元的顶部的同时曝光而被损坏，以及 图像读取单元的顶部。

公开(公告)号：US20090214153A1

公开(公告)日：2009-08-27

申请号：US12366042

申请日：2009-02-05

申请人： Byeong Ha LEE ,  Myoung Jin Kim

发明人： Byeong Ha LEE ,  Myoung Jin Kim

IPC分类号： G02B6/00 ,  C03B37/00

CPC分类号： G02B6/105 ,  G02B6/274 ,  G02B6/2766

摘要： The invention discloses an in-line polarization-state converter. In the polarization converter, a laser beam is radiated onto the side of a photosensitive optical fiber. The laser beam causes the refractive index of an optical fiber core to asymmetrically vary. Birefringence is induced in a core mode of the optical fiber by the variation in the asymmetrical refractive index. An optical fiber segment having the birefringence is generally disposed on a waveguide path of the optical fiber to change the polarization state of an optical signal passing through the optical fiber segment. That is, the phase of the optical signal passing through the optical fiber is changed by radiation of laser beams, which results in a variation in polarization state. The polarization converter disposed on the waveguide path is covered with a metal tube in order to prevent the polarization converter from being bent or broken. In addition, optical fiber connectors are provided at both ends of the polarization converter for easy connection.

摘要翻译： 本发明公开了一种在线偏振态转换器。 在偏振转换器中，将激光束照射到光敏光纤侧。 激光束使光纤芯的折射率不对称地变化。 通过不对称折射率的变化在光纤的纤芯模式中诱发双折射。 具有双折射率的光纤段通常设置在光纤的波导路径上，以改变通过光纤段的光信号的偏振状态。 也就是说，通过光纤的光信号的相位被激光束的辐射改变，这导致极化状态的变化。 设置在波导路径上的偏振转换器被金属管覆盖，以防止偏振转换器弯曲或破裂。 此外，在偏振转换器的两端设有光纤连接器，便于连接。

公开(公告)号：US20080310898A1

公开(公告)日：2008-12-18

申请号：US12109626

申请日：2008-04-25

申请人： Yong Kon Jo ,  Myoung Jin Kim ,  Heung Kyu Jang

发明人： Yong Kon Jo ,  Myoung Jin Kim ,  Heung Kyu Jang

IPC分类号： G03G15/00 ,  E05B65/00

CPC分类号： H04N1/00519 ,  G03G15/00 ,  G03G15/605 ,  G03G2221/1654 ,  H04N1/00 ,  H04N1/00554 ,  H04N1/00596 ,  H04N2201/0091 ,  H04N2201/0094 ,  Y10T70/50

摘要： An image forming apparatus having an automatic document feeding unit so as to successively read documents is disclosed. The image forming apparatus includes an image forming unit to form an image on a printing medium, an image reading unit pivotally coupled to an upper portion of the image forming unit to expose and shield a top of the image forming unit, an automatic document feeding unit pivotally coupled to an upper portion of the image reading unit to expose and shield a top of the image reading unit, and a locking device to selectively expose any one of the top of the image forming unit and the top of the image reading unit. Since the locking device prevents the top of the image forming unit and the top of the image reading unit from being simultaneously exposed, the automatic document feeding unit can be prevented from being damaged due to the simultaneous exposure of the top of the image forming unit and the top of the image reading unit.

摘要翻译： 公开了一种具有自动文件馈送单元以便连续读取文档的图像形成装置。 图像形成装置包括：图像形成单元，用于在打印介质上形成图像;图像读取单元，其可枢转地联接到图像形成单元的上部，以暴露和屏蔽图像形成单元的顶部;自动文件馈送单元 枢转地联接到图像读取单元的上部以暴露和屏蔽图像读取单元的顶部;以及锁定装置，用于选择性地暴露图像形成单元的顶部和图像读取单元的顶部中的任一个。 由于锁定装置防止图像形成单元的顶部和图像读取单元的顶部同时暴露，所以可以防止自动文件馈送单元由于图像形成单元的顶部的同时曝光而被损坏，以及 图像读取单元的顶部。