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公开(公告)号：US5396368A
公开(公告)日：1995-03-07
申请号：US718966
申请日：1985-01-14
摘要： A flexible rejection filter removes coherent radiation from an incoming beam of light. The filter includes a beamsplitter for dividing the transmitted portion into first and second beams. A photorefractive crystal in the paths of the first and second beams couples coherent radiation from the first beam to the second beam. A focal plane detector follows the crystal in the path of the first beam for sensing the incoherent radiation in the first beam, while a beam dump follows the crystal in the path of the second beam for absorbing the coherent radiation of the second beam. Other filter configurations can utilize contradirectional energy coupling or resonator structures in conjunction with photorefractive media.
摘要翻译： 柔性剔除滤波器从入射光束去除相干辐射。 滤波器包括用于将传输部分分成第一和第二波束的分束器。 第一和第二光束的路径中的光折射晶体将来自第一光束的相干辐射耦合到第二光束。 焦平面检测器跟随第一光束的路径中的晶体，用于感测第一光束中的非相干辐射，而光束转移跟随第二光束的路径中的晶体，用于吸收第二光束的相干辐射。 其他滤波器配置可以与光折射介质结合使用反向能量耦合或谐振器结构。
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公开(公告)号：US4648092A
公开(公告)日：1987-03-03
申请号：US780057
申请日：1985-09-25
CPC分类号： H01S3/10076 , H01S3/108 , H01S3/2383 , H01S3/10092 , H01S3/1307
摘要： Laser energy is combined using dynamic beam splitters that can automatically accommodate changes in the laser cavity mode structure. Nonlinear optical methods and real time holography are employed to achieve phase locking among multiple lasers. A single laser output beam can be produced from a multitude of laser cavities which collectively contribute to the output power. No outside monitoring and servo mechanisms are required, since nonlinear optical processes automatically perform the functions of both monitoring and control. A coupled laser system includes two or more lasers, each laser having a resonant cavity, a laser gain medium in the resonant cavity, and a nonlinear optical element. Each nonlinear optical element is positioned in its respective resonant cavity to diffract laser energy from the cavity to a coupling beam by means of four-wave mixing (phase conjugation). Each cavity is coupled to another resonant cavity within the system by the coupling beams such that nonlinear optical interactions phase lock the outputs of all the lasers.
摘要翻译： 使用可以自动适应激光腔模式结构的变化的动态分束器来组合激光能量。 采用非线性光学方法和实时全息术来实现多个激光器之间的相位锁定。 单个激光输出光束可以从共同有助于输出功率的多个激光腔产生。 不需要外部监控和伺服机构，因为非线性光学过程自动执行监控和控制的功能。 耦合激光系统包括两个或更多个激光器，每个激光器具有谐振腔，谐振腔中的激光增益介质和非线性光学元件。 每个非线性光学元件位于其相应的谐振腔中，通过四波混频（相位共轭）将激光能量从腔体衍射成耦合光束。 每个腔通过耦合束耦合到系统内的另一谐振腔，使得非线性光学相互作用相位锁定所有激光器的输出。
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公开(公告)号：US4761059A
公开(公告)日：1988-08-02
申请号：US890055
申请日：1986-07-28
CPC分类号： G02F1/3534 , H01S3/2383
摘要： A coupled laser system includes a plurality of substantially parallel beams of coherent radiation with an output beam of coherent radiation at an oblique angle with respect to the plurality of beams. A photorefractive element is positioned to receive the plurality of beams and the output beams, the beams being frequency locked to within the photorefractive bandwidth of the photorefractive element such that laser energy is diffracted from the plurality of beams to the output beam by means of two-wave mixing. A lens may be used for focussing the parallel beams in the photorefractive element, while a plurality of mirrors may be supplied for adjusting the orientation of the output beam within the photorefractive element. Another coupled laser system includes a plurality of lasers, each laser providing a beam of coherent radiation, an optical resonant cavity, and a photorefractive element positioned within the resonant cavity, the beam being frequency locked to within the photorefractive bandwidth of the photorefractive element such that laser energy is diffracted from the coherent beams to a coupling beam in the resonant cavity by means of two-wave mixing. The resonant cavity is defined by a unidirectional ring resonator, with a partially reflecting mirror, a first substantially 100% reflecting mirror, and a second substantially 100% reflecting mirror.
摘要翻译： 耦合激光系统包括多个基本上平行的相干辐射光束，相干辐射的输出光束相对于多个光束呈倾斜角。 光折射元件被定位成接收多个光束和输出光束，所述光束被频率锁定在光折变元件的光折射带宽内，使得激光能量通过二维光束从多个光束衍射到输出光束， 波混合。 可以使用透镜来聚焦光折射元件中的平行光束，同时可以提供多个反射镜来调节光折射元件内的输出光束的取向。 另一耦合激光系统包括多个激光器，每个激光器提供相干辐射束，光学谐振腔和位于谐振腔内的光折射元件，该光束被频率锁定在光折变元件的光折射带宽内，使得 激光能量通过双波混频从相干光束衍射到谐振腔中的耦合光束。 谐振腔由具有部分反射镜，第一基本上100％反射镜和第二基本上100％反射镜的单向环形谐振器限定。
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公开(公告)号：US4640618A
公开(公告)日：1987-02-03
申请号：US548585
申请日：1983-11-03
申请人： John M. Tracy , Pochi A. Yeh , Mohsen Khoshnevisan
发明人： John M. Tracy , Pochi A. Yeh , Mohsen Khoshnevisan
CPC分类号： G01P3/50 , G01C21/16 , G02F1/3538
摘要： A relative position sensor is suitable for inertial navigation situations in which deviations from a predetermined position schedule are detected. A standing wave is established between a pair of opposed phase conjugate reflectors in a resonating cavity, and relative movement between the standing wave and the cavity is sensed. Since the standing wave continues to travel at its initial velocity regardless of deviations from that velocity by the resonator, deviations in the position of the resonator relative to its projected position based on the initial velocity can be measured. In a preferred embodiment, four-wave mixers are used as the phase conjugate reflectors, the phase conjugate medium within the mixers is made coextensive with the wave propagation medium between the mixers, and relative movement is sensed by monitoring the intensity of the standing wave at at least one location which is fixed relative to the resonator.
摘要翻译： 相对位置传感器适用于检测到与预定位置调度的偏差的惯性导航情况。 在谐振腔中的一对相对共轭反射器之间建立驻波，并且感测驻波和腔之间的相对运动。 由于驻波以其初始速度继续行进，无论谐振器是否与该速度偏离，可以测量谐振器相对于其投影位置的位置的偏差，基于初始速度。 在优选实施例中，使用四波混频器作为相位共轭反射器，混频器内的相位共轭介质与混频器之间的波传播介质共同延伸，并且通过监测驻波的强度来感测相对运动 至少一个相对于谐振器固定的位置。
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5.发明授权Compensator for liquid crystal display, having two types of layers with different refractive indices alternating 失效用于液晶显示器的补偿器，具有交替的具有不同折射率的两种类型的层
公开(公告)号：US5196953A
公开(公告)日：1993-03-23
申请号：US786621
申请日：1991-11-01
IPC分类号： G02F1/1335 , G02F1/13363
CPC分类号： G02F1/13363 , G02F2413/01 , G02F2413/11 , G02F2413/13
摘要： A liquid crystal display includes a polarizer layer, an analyzer layer, a liquid crystal layer disposed between the polarizer layer and the analyzer layer, a first electrode proximate to a first major surface of the liquid crystal layer, and a second electrode proximate to a second major surface of the liquid crystal layer. The first and second electrodes are adapted to apply a voltage across the liquid crystal layer when the electrodes are connected to a source of electrical potential. A multilayer thin film compensator is disposed between the polarizer layer and the analyzer layer, the multilayer compensator including a first plurality of layers, each having a first refractive index and a first thickness, alternating with a second plurality of layers, each having a second refractive index and a second thickness. The values of the first and second refractive indices and thicknesses are such that the phase retardation of the multilayer is equal in magnitude but opposite in sign to the phase retardation of the liquid crystal layer in its homeotropically aligned state over a predetermined range of viewing angles.
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公开(公告)号：US5006813A
公开(公告)日：1991-04-09
申请号：US827583
申请日：1986-02-10
申请人： Mohsen Khoshnevisan , Pochi A. Yeh
发明人： Mohsen Khoshnevisan , Pochi A. Yeh
摘要： A nonlinear optical receiver includes a source of coherent light of frequency .omega. for illuminating a spatial region. The portion of the source light which is reflected from objects within the spatial region constitutes a signal beam. A reference beam of coherent light of frequency .omega. is also provided. A photorefractive element receives the signal and reference beams and amplifies the signal beam by two-wave mixing.The receiver may include a first polarizer, having a first polarization direction, placed between a cubic photorefractive element and the signal and reference beams, and a second polarizer, having a second polarization direction perpendicular to the first polarization direction, placed so that the amplified signal beam must pass therethrough. A frequency shifting element, such as a Bragg cell modulator, is used to change the frequency of the reference beam. pa A first laser may provide both the source of coherent light and the reference beam of coherent light, or a first laser may provide the source of coherent light while a second laser provides the reference beam of coherent light. The photorefractive element may be a cubic photorefractive crystal or a nonlinear optic material. A two dimensional focal plane array may be added for detecting the amplified signal beam.
摘要翻译： 非线性光学接收器包括用于照射空间区域的频率ω的相干光源。 从空间区域内的物体反射的源光的部分构成信号光束。 还提供频率ω的相干光的参考光束。 光折射元件接收信号和参考光束，并通过双波混频放大信号光束。 接收机可以包括具有第一偏振方向的第一偏振器，放置在立方光折射元件和信号和参考光束之间，第二偏振器具有垂直于第一偏振方向的第二偏振方向，以便放大信号 梁必须通过。 使用诸如布拉格单元调制器的频移元件来改变参考光束的频率。 第一激光器可以提供相干光源和相干光的参考光束，或者第一激光器可以提供相干光源，而第二激光器提供相干光的参考光束。 光折变元件可以是立方光折射晶体或非线性光学材料。 可以添加二维焦平面阵列以检测放大的信号光束。
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公开(公告)号：US4960322A
公开(公告)日：1990-10-02
申请号：US289632
申请日：1988-12-23
申请人： Mohsen Khoshnevisan , Pochi A. Yeh
发明人： Mohsen Khoshnevisan , Pochi A. Yeh
IPC分类号： G02F1/33
CPC分类号： G02F1/332
摘要： An apparatus for steering a coherent input beam of electromagnetic energy includes an optically nonlinear medium for positioning in the path of the input beam. A source of acoustic energy generates acoustic waves in the nonlinear medium with a predetermined frequency and direction. The frequency and direction of the acoustic waves are selected to diffract a portion of the input beam as an output beam at a predetermined angle with respect to the input beam, interference between the input beam and the output beam initially causing an electrostrictive grating to form in the medium, with the grating subsequently causing additional energy to be transferred from the input beam to the output beam by stimulated Brillouin scattering.
摘要翻译： 用于控制电磁能量的相干输入光束的装置包括用于在输入光束的路径中定位的光学非线性介质。 声能源在具有预定频率和方向的非线性介质中产生声波。 选择声波的频率和方向以相对于输入光束以预定角度衍射输入光束的一部分作为输出光束，输入光束和输出光束之间的干扰最初导致电致伸缩光栅形成 该介质随着光栅随后引起额外的能量通过受激布里渊散射从输入光束传输到输出光束。
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公开(公告)号：US07961369B2
公开(公告)日：2011-06-14
申请号：US11238590
申请日：2005-09-28
申请人： Mohsen Khoshnevisan , Ray C. Delcher , Mark D. Ewbank , Arthur Chiou , William R. Christian , Randolph L. Hall
发明人： Mohsen Khoshnevisan , Ray C. Delcher , Mark D. Ewbank , Arthur Chiou , William R. Christian , Randolph L. Hall
IPC分类号： G02B26/12
CPC分类号： G02B26/0816 , G02B5/284
摘要： A laser beam steering apparatus includes a beam steering cell with an adjustable shape, with the cell having opposing Fabry-Perot filters, and a steering mechanism coupled to the cell to adjust its shape so that the direction of a laser beam emitted from the cell is changed in response to a change in the cell shape.
摘要翻译： 激光束转向装置包括具有可调节形状的光束转向单元，该单元具有相对的法布里 - 珀罗滤光器，以及耦合到单元以调节其形状的转向机构，使得从单元发射的激光束的方向为 响应于细胞形状的变化而改变。
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公开(公告)号：US07850740B2
公开(公告)日：2010-12-14
申请号：US12062227
申请日：2008-04-03
CPC分类号： A61F2/2814 , A61F2/30749 , A61F2/78 , A61F2/80 , A61F2002/30024 , A61F2002/30079 , A61F2002/30433 , A61F2002/5056 , A61F2002/6863 , A61F2002/704 , A61F2002/705 , A61F2002/7625 , A61F2002/7635 , A61F2002/7665 , A61F2002/768 , A61F2002/7818 , A61F2002/785 , A61F2002/7887 , A61F2210/009 , A61F2220/0041 , A61F2250/0021
摘要： Provided is a prosthesis system for indirectly coupling a prosthesis to the skeletal structure of a person. The system includes a plurality of individual magnets and magnet sets attached to a prosthetic socket of a prosthetic device. The magnets may be permanent magnets or electromagnets. A second plurality of magnets is embedded within a residual limb of a person, mounted to or within a sub-dermal strut. In operation, the magnetic fields generated by the magnets of the prosthetic socket, which may be dynamic magnetic fields, interact with the magnetic fields generated by the magnets anchored beneath the skin of the person, to hold the prosthetic device in position during use. A power supply provides current to any electromagnets, and a controller alters any required magnetic fields based on input received from both load and position sensors in the sub-dermal strut.
摘要翻译： 提供了一种用于将假体间接地联接到人的骨骼结构的假体系统。 该系统包括附接到假体装置的假体插座的多个单个磁体和磁体组。 磁体可以是永磁体或电磁体。 第二组多个磁体被嵌入在人的残肢中，安装在子皮支架内或内皮支柱内。 在操作中，由可能是动态磁场的假肢插座的磁体产生的磁场与由锚定在人的皮肤下面的磁体产生的磁场相互作用，以在使用期间将假体装置保持在适当位置。 电源向任何电磁铁提供电流，并且控制器基于从次级支架中的负载和位置传感器接收的输入来改变任何所需的磁场。
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10.发明授权Method and apparatus for optically powering and multiplexing distributed fiber optic sensors 有权分布式光纤传感器光学供电和复用的方法和装置公开(公告)号：US07356209B2
公开(公告)日：2008-04-08
申请号：US11779999
申请日：2007-07-19
CPC分类号： H04B10/806
摘要： An optical power converting apparatus is provided that may be used with remote sensors. A plurality of remote sensors may be coupled to a backbone optical fiber with each sensor having an optical power converter that receives an optical signal from a head end of that fiber. The optical power converters may store electrical energy derived from that optical signal and use that energy to power the remote sensors. The head end's optical signal may also include a clock signal, and each remote sensor may be set to sense a measurable parameter after a given number of clock cycles have been counted. In a further example, each of the optical sensors may be synchronized before counting these clock signals via a synchronization signal from the optical power converter. The remote sensors may individually and separately uplink their sensed data to the head end on the optical fiber. The apparatus may be implemented in a vehicle health management system, for example.
摘要翻译： 提供了可以与远程传感器一起使用的光功率转换装置。 多个远程传感器可以耦合到主干光纤，每个传感器具有从该光纤的头端接收光信号的光功率转换器。 光功率转换器可以存储从该光信号导出的电能并使用该能量来为远程传感器供电。 头端的光学信号还可以包括时钟信号，并且每个远程传感器可以被设置为在给定数量的时钟周期被计数之后感测可测量的参数。 在另一示例中，每个光学传感器可以在经由来自光功率转换器的同步信号对这些时钟信号进行计数之前同步。 远程传感器可以将其感测数据单独地和单独上行到光纤上的头端。 该装置可以例如在车辆健康管理系统中实现。
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