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1. 发明授权

US5926302A Bi-directional optical wireless communication apparatus and method of Bi-directional optical wireless communication 失效
标题翻译：双向光无线通信装置及双向光无线通信方法
公开(公告)号：US5926302A
公开(公告)日：1999-07-20
申请号：US665361
申请日：1996-06-17
申请人： Kazutoshi Hirohashi , Atsushi Sakamoto , Manabu Sakane
发明人： Kazutoshi Hirohashi , Atsushi Sakamoto , Manabu Sakane
IPC分类号： H04B10/00 , H04B10/071 , H04B10/11 , H04B10/2507 , H04B10/293 , H04B10/54 , H04B10/564 , H04B10/572 , H04J14/02
CPC分类号： H04B10/11
摘要： A bi-directional optical wireless communication apparatus comprises a modulator outputting a narrow band signal whose center frequency is selected from N center frequencies, an optical transmitter transmitting an optical signal from the narrow band signal, an optical receiver for receiving N optical signals, N receiving circuits corresponding to the N center frequencies, a cancelling circuit for cancelling the optical signal received by the optical receiver via reflective object in received N optical signals using the narrow band signal in accordance with a magnitude of the optical signal received by the optical receiver, a frequency discriminator discriminating frequencies of the received N optical signals, and a control circuit. The frequency discriminator discriminates for an interval that the optical transmitter does not transmit the optical signal. Then, the modulating circuit continuously outputs a received signal from one of N receiving circuits corresponding to the discriminated frequency and the modulator modulates the narrow band signal to have a center frequency other than the discriminated frequency under control of the control circuit. The interval is repeated with a repetition randomly set interval.
摘要翻译：双向光无线通信装置包括：调制器，输出中心频率选自N个中心频率的窄频带信号，从窄带信号发射光信号的光发射机，接收N个光信号的光接收机，N个接收机对应于N个中心频率的电路;消除电路，用于根据由光接收器接收的光信号的大小，使用窄带信号，在接收到的N个光信号中通过反射对象从光接收器接收的光信号; 接收的N个光信号的鉴频器鉴频器频率和控制电路。鉴频器鉴别光发射机不发送光信号的间隔。然后，调制电路从对应于鉴别频率的N个接收电路中的一个连续地输出接收信号，调制器在控制电路的控制下对窄带信号进行调制，使其具有不同于鉴别频率的中心频率。间隔重复随机设置间隔。

2. 发明授权

US5532858A Optical radio transmission system and a method for adjusting optical axes thereof 失效
标题翻译：光无线传输系统及其光轴的调整方法
公开(公告)号：US5532858A
公开(公告)日：1996-07-02
申请号：US136848
申请日：1993-10-18
申请人： Kazutoshi Hirohashi , Teruhiko Shinomiya , Manabu Sakane , Keishi Ushijima , Takaaki Takeda , Masamichi Satou , Michio Kikuta , Motoyasu Nagashima
发明人： Kazutoshi Hirohashi , Teruhiko Shinomiya , Manabu Sakane , Keishi Ushijima , Takaaki Takeda , Masamichi Satou , Michio Kikuta , Motoyasu Nagashima
IPC分类号： H04B10/114 , H04B10/10 , H04B10/24
CPC分类号： H04B10/1143
摘要： An optical radio communication system comprising a first light transmitting system and a second light transmitting system. Each of said first and second light transmitting system comprising a transmitting means and a receiving means. Said transmitting means comprising a light emitting element positioned in a region including and surrounding a focal point of a first parabolic reflector for emitting light beams, said first parabolic reflector having an inner reflective surface for reflecting said light beams emitted from said light emitting element, and a means for driving said light emitting element with a signal to be transmitted. Said receiving means comprising a second parabolic reflector having an inner reflective surface for reflecting incident light beams, a light receiving element positioned in a region including and surrounding a focal point of said second parabolic reflector for receiving light beams reflected by said second parabolic reflector to output signals, and means for taking out information from said signals outputted from said light receiving element. In this optical radio communication system, broadband signals such as Manchester coded signals are directly transmitted on optical radio.
摘要翻译：一种包括第一光发射系统和第二光发射系统的光无线电通信系统。所述第一和第二光发射系统中的每一个包括发射装置和接收装置。所述发送装置包括位于包括并围绕第一抛物面反射器的焦点以发射光束的区域中的发光元件，所述第一抛物面反射器具有用于反射从所述发光元件发射的所述光束的内反射表面，以及用于用要发送的信号驱动所述发光元件的装置。所述接收装置包括具有用于反射入射光束的内部反射表面的第二抛物面反射器，位于包括并围绕所述第二抛物面反射器的焦点的区域中的光接收元件，用于接收由所述第二抛物面反射器反射的光束以输出信号以及从所述光接收元件输出的信号中取出信息的装置。在该光无线通信系统中，诸如曼彻斯特编码信号的宽带信号在光无线电上直接发送。

3. 发明授权

US5289306A Repeater system 失效
标题翻译：中继系统
公开(公告)号：US5289306A
公开(公告)日：1994-02-22
申请号：US858292
申请日：1992-03-26
申请人： Kazutoshi Hirohashi , Akio Yoshikawa , Takaaki Takeda , Takeshi Nomoto , Keishi Ushijima
发明人： Kazutoshi Hirohashi , Akio Yoshikawa , Takaaki Takeda , Takeshi Nomoto , Keishi Ushijima
IPC分类号： H04B10/11 , H04B10/16
CPC分类号： H04B10/1149
摘要： A repeater for packet data optical communication between terminal devices includes a first section and a second section. The first section includes a first device for receiving a first optical signal transmitted from a terminal device and for converting the first optical signal into a first electric signal, a second device for frequency-converting the first electric signal to a second electric signal, and a third device for converting the second electric signal into a second optical signal and for transmitting the second optical signal. The second section includes a fourth device for receiving a third optical signal and for converting the third optical signal into a third electric signal, a fifth device for frequency-converting the third electric signal to a fourth electric signal, and a sixth device for converting the fourth electric signal into a fourth optical signal and for transmitting the fourth optical signal to a terminal device.
摘要翻译：用于终端设备之间的分组数据光通信的中继器包括第一部分和第二部分。第一部分包括用于接收从终端装置发送的第一光信号并将第一光信号转换为第一电信号的第一装置，用于将第一电信号频率转换为第二电信号的第二装置，以及第三装置，用于将第二电信号转换成第二光信号并用于发送第二光信号。第二部分包括用于接收第三光信号并将第三光信号转换为第三电信号的第四装置，用于将第三电信号频率转换为第四电信号的第五装置，以及用于转换第三电信号的第六装置第四电信号转换成第四光信号，并将第四光信号发送到终端装置。

4. 发明授权

US07526155B2 Rotary joint 有权
标题翻译：旋转接头
公开(公告)号：US07526155B2
公开(公告)日：2009-04-28
申请号：US11898403
申请日：2007-09-12
申请人： Kazutoshi Hirohashi , Masahisa Sakai
发明人： Kazutoshi Hirohashi , Masahisa Sakai
IPC分类号： G02B6/26 , G02B6/42
CPC分类号： G02B6/3604 , G02B6/4214 , H04B10/801
摘要： A rotary joint 1 capable of stably transmitting superfine images and high-speed data is provided. The rotary joint 1 includes a stationary part 3 and a rotary part 2 rotatable about an axis against the stationary part 3 and transmits light signals between the stationary part 3 and the rotary part 2. The rotary part 2 includes at least one light transmissive cylindrical member 101 arranged coaxially with the axis, a light emitting element 11 and a light receiving element 14 both arranged on one end of the member 101. While, the stationary part 3 includes a light receiving element 12 opposed to the light emitting element 11 in the rotary part 2 and a light emitting element 13 opposed to the light receiving element 14 in the rotary part 2.
摘要翻译：提供能够稳定地发送超精细图像和高速数据的旋转接头1。旋转接头1包括固定部分3和旋转部分2，旋转部分2可围绕静止部分3绕轴线转动，并在固定部分3和旋转部分2之间传递光信号。旋转部分2包括至少一个透光圆柱形部件 101，同轴地配置有发光元件11和光接收元件14，两者都设置在构件101的一端上。而固定部分3包括在旋转体中与发光元件11相对的光接收元件12 部分2和与旋转部分2中的光接收元件14相对的发光元件13。

5. 发明授权

US4574390A Noise reduction for stereophonic FM signals by high-speed sampling and linear interpolation 失效
标题翻译：通过高速采样和线性插值降低立体声FM信号
公开(公告)号：US4574390A
公开(公告)日：1986-03-04
申请号：US594683
申请日：1984-03-26
申请人： Kazutoshi Hirohashi , Yukinobu Ishigaki
发明人： Kazutoshi Hirohashi , Yukinobu Ishigaki
IPC分类号： H03G3/34 , H04B1/16 , H04H5/00
CPC分类号： H04B1/1661 , H03G3/345
摘要： In a noise reduction circuit for reception of stereophonic FM signals in which the demodulated signal is chopped at twice the pilot frequency for separation between left- and right-channel signals, the demodulated signal is sampled by a first sample-and-hold circuit in response to the output of the noise detector to store that portion of the signal which appeared immediately prior to the occurrence of an impulse noise. The demodulated signal is also sampled by a second sample-and-hold circuit at a frequency twice the pilot frequency to eliminate a noise which might arise due to the chopping of the demodulated signal. A signal is derived from the outputs of the first and second sample-and-hold circuits that indicates the slope ratio of the demodulated signal at the moment that occurred immediately prior to the impulse noise. The slope ratio signal is applied to a linear integrator to generate a compensating voltage which is summed with the signal sampled by the first sample-and-hold circuit at the level which occurred immediately prior to the occurrence of the impulse noise.
摘要翻译：在用于接收立体声FM信号的噪声降低电路中，其中解调信号以两倍于用于分离左声道和右声道信号的导频之间的斩波，解调的信号由第一采样保持电路进行采样到噪声检测器的输出端以存储紧接在脉冲噪声发生之前出现的那部分信号。解调信号也由第二采样保持电路以导频频率的两倍采样，以消除由于解调信号的斩波而可能产生的噪声。来自第一和第二采样保持电路的输出的信号是指示紧接在脉冲噪声之前发生的时刻的解调信号的斜率比。斜率比信号被施加到线性积分器，以产生补偿电压，该补偿电压与由第一采样保持电路采样的信号相加，发生在紧接在脉冲噪声之前发生的电平。

6. 发明授权

US06867929B2 Light source device 有权
标题翻译：光源装置
公开(公告)号：US06867929B2
公开(公告)日：2005-03-15
申请号：US10143923
申请日：2002-05-14
申请人： Francisco-José López-Hernández , Juan-Carlos Mi{overscore (n)}ano-Dominguez , Pablo Benitez-Giménez , Masahisa Sakai , Kazutoshi Hirohashi
发明人： Francisco-José López-Hernández , Juan-Carlos Mi{overscore (n)}ano-Dominguez , Pablo Benitez-Giménez , Masahisa Sakai , Kazutoshi Hirohashi
IPC分类号： G02B3/00 , G02B5/02 , G02B17/08 , G02B19/00 , G02B27/09 , G02B27/18 , H01S3/00 , H01S5/00 , H01S5/068 , G02B17/00 , G01J1/00 , G02B13/20 , G02B27/30
CPC分类号： G02B5/0284 , G02B5/0278 , H01S3/005 , H01S5/005 , H01S5/06825
摘要： The present invention provides a light source device that is safe for human eyes and whose switching is performed at high speed. The light source device comprises one or more laser light sources (1) for emitting a monochromatic or polychromatic light beam, a diffuser (3), which may be transmissive, reflective, or a mixture thereof, for diffusing the light beam received directly from the laser light source or via an optical focusing system (2), and an optical collimator (4), which collimates the diffused light bundle emitted from the diffuser (3).
摘要翻译：本发明提供一种对人眼安全的光源装置，其高速切换。光源装置包括用于发射单色或多色光束的一个或多个激光源（1），可以是透射，反射或混合的扩散器（3），用于将直接从激光光源或通过光学聚焦系统（2）和准直器（4），其准直从扩散器（3）发射的漫射光束。

7. 发明授权

US5349463A Optical radio repeater with signal quality detection 失效
标题翻译：具有信号质量检测的光无线电中继器
公开(公告)号：US5349463A
公开(公告)日：1994-09-20
申请号：US68572
申请日：1993-05-28
申请人： Kazutoshi Hirohashi , Hiroshi Horii , Hideo Koike , Yoshiaki Yunoki , Tetsuo Fukasawa , Susumu Katayama , Akio Yoshikawa , Keishi Ushijima , Takaaki Takeda , Takeshi Nomoto , Michio Kikuta , Shunichi Shichijo , Yoshiki Iwasaki
发明人： Kazutoshi Hirohashi , Hiroshi Horii , Hideo Koike , Yoshiaki Yunoki , Tetsuo Fukasawa , Susumu Katayama , Akio Yoshikawa , Keishi Ushijima , Takaaki Takeda , Takeshi Nomoto , Michio Kikuta , Shunichi Shichijo , Yoshiki Iwasaki
IPC分类号： H04B10/10 , H04B10/00 , H04B10/16
CPC分类号： H04B10/1149
摘要： An optical radio system includes a host device, an end device, and a repeater. The host device and the end device communicate with each other via the repeater by use of optical radio. The repeater includes a section for receiving a first light signal from one of the host device and the end device, a section for converting the received first light signal into a first electric signal, a section for frequency-converting the first electric signal into a second electric signal, and a section for generating a second light signal in response to the second electric signal and transmitting the generated second light signal. The repeater also includes a section for demodulating one of the first electric signal and the second electric signal into a baseband signal, a section for detecting a quality of the baseband signal, and a section for enabling transmission of the second light signal only when the detected quality of the baseband signal is equal to or greater than a predetermined quality.
摘要翻译：光无线电系统包括主机设备，终端设备和中继器。主机设备和终端设备通过中继器通过使用光无线电相互通信。中继器包括用于从主机设备和终端设备之一接收第一光信号的部分，用于将接收的第一光信号转换为第一电信号的部分，用于将第一电信号频率转换为第二电信号的部分电信号和用于响应于第二电信号产生第二光信号并发送所生成的第二光信号的部分。中继器还包括用于将第一电信号和第二电信号中的一个解调为基带信号的部分，用于检测基带信号的质量的部分，以及仅在检测到的基带信号时能够传输第二光信号的部分基带信号的质量等于或大于预定质量。

8. 发明申请

US20080069495A1 Rotary joint 有权
标题翻译：旋转接头
公开(公告)号：US20080069495A1
公开(公告)日：2008-03-20
申请号：US11898403
申请日：2007-09-12
申请人： Kazutoshi Hirohashi , Masahisa Sakai
发明人： Kazutoshi Hirohashi , Masahisa Sakai
IPC分类号： G02B6/26
CPC分类号： G02B6/3604 , G02B6/4214 , H04B10/801
摘要： A rotary joint 1 capable of stably transmitting superfine images and high-speed data is provided. The rotary joint 1 includes a stationary part 2 and a rotary part 3 rotatable about an axis against the stationary part 2 and transmits light signals between the stationary part 2 and the rotary part 3. The rotary part 3 includes at least one light transmissive cylindrical member 101 arranged coaxially with the axis, a light emitting element 11 and a light receiving element 14 both arranged on one end of the member 101. While, the stationary part 2 includes a light receiving element 12 opposed to the light emitting element 11 in the rotary part 3 and a light emitting element 13 opposed to the light receiving element 14 in the rotary part 3.
摘要翻译：提供能够稳定地发送超精细图像和高速数据的旋转接头1。旋转接头1包括固定部分2和旋转部分3，该旋转部分3围绕静止部分2的轴线可旋转，并且在静止部分2和旋转部分3之间传递光信号。旋转部3包括至少一个与轴同轴布置的透光圆柱形构件101，发光元件11和光接收元件14均布置在构件101的一端。而固定部分2包括与旋转部分3中的发光元件11相对的光接收元件12和与旋转部分3中的光接收元件14相对的发光元件13。

9. 发明授权

US5600471A Optical wireless data transmission system and optical wireless data transmitting/receiving apparatus 失效
标题翻译：光无线数据传输系统和光无线数据发射/接收设备
公开(公告)号：US5600471A
公开(公告)日：1997-02-04
申请号：US430041
申请日：1995-04-27
申请人： Kazutoshi Hirohashi , Yoshiaki Yunoki
发明人： Kazutoshi Hirohashi , Yoshiaki Yunoki
IPC分类号： H04B10/10 , H04B10/00
CPC分类号： H04B10/11 , H04B10/1149
摘要： An optical wireless transmission system providing short-distance communication, such as for linking a personal computer to a LAN, utilizes direct baseband modulation of optical signals, but provides simultaneous bidirectional transmission of data between a pair of optical transmitting/receiving units while also enabling a data clock signal to be easily regenerated from a received optical signal. Effects of signal noise due to artificial illumination are eliminated by a suitable choice of transmission bandwidth, and bandpass filtering of a received data signal.
摘要翻译：提供诸如用于将个人计算机连接到LAN的短距离通信的光无线传输系统利用光信号的直接基带调制，但在一对光发射/接收单元之间提供数据的同时双向传输，同时还能够数据时钟信号从接收到的光信号容易地再生。通过合适的传输带宽选择和接收数据信号的带通滤波来消除由于人造照明引起的信号噪声的影响。

10. 发明授权

US4698693A Audio magnetic recording and/or reproducing apparatus utilizing frequency modulation 失效
标题翻译：利用频率调制的音频磁记录和/或再现装置
公开(公告)号：US4698693A
公开(公告)日：1987-10-06
申请号：US727757
申请日：1985-04-26
申请人： Yukinobu Ishigaki , Yasuomi Namiki , Hisashige Fujiwara , Kazutoshi Hirohashi
发明人： Yukinobu Ishigaki , Yasuomi Namiki , Hisashige Fujiwara , Kazutoshi Hirohashi
IPC分类号： G11B5/02 , G11B5/035 , G11B20/06 , G11B20/22 , H04N5/95 , H04N9/802 , H04N9/835 , H04N5/782
CPC分类号： H04N9/8355 , G11B20/06 , G11B20/22 , G11B5/035 , H04N5/95 , H04N9/802
摘要： A rotary head type magnetic recording and reproducing apparatus comprises a circuit for recording and reproducing a signal on and from a magnetic recording medium by rotary heads, a circuit for obtaining a frequency modulated (FM) audio signal by frequency-modulating a carrier by an audio signal which is to be recorded, a circuit for generating a frequency drift detection signal having a constant frequency which does not exist within a frequency range occupied by the FM audio signal, a circuit for obtaining a frequency multiplexed signal by frequency-multiplexing the FM audio signal and the detection signal, a circuit for separating the FM audio signal and the detection signal from the signal reproduced by the rotary heads, a demodulating circuit for obtaining an audio signal by frequency-demodulating the separated FM audio signal, a detecting circuit for frequency-demodulating the separated detection signal and for detecting a frequency drift component, a circuit for forming a frequency drift correction signal responsive to the output of the detecting circuit, and a circuit for correcting a frequency drift component in the output audio signal of the demodulating circuit by the correction signal.
摘要翻译：一种旋转磁头式磁记录和重放装置包括用于通过旋转磁头记录和再现来自磁记录介质的信号的电路，用于通过音频对载波进行频率调制来获得调频（FM）音频信号的电路要被记录的信号，用于产生频率偏移检测信号的电路，该频率漂移检测信号具有在FM音频信号所占据的频率范围内不存在的恒定频率，用于通过对FM音频进行频率复用来获得频率复用信号的电路信号和检测信号，用于将FM音频信号和检测信号与由旋转磁头再现的信号分离的电路，用于通过频率解调分离的FM音频信号来获得音频信号的解调电路，用于频率的检测电路 - 分离检测信号和检测频率漂移分量，形成频率的电路响应于检测电路的输出的循环漂移校正信号，以及用于通过校正信号校正解调电路的输出音频信号中的频率漂移分量的电路。

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