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公开(公告)号：US5910857A
公开(公告)日：1999-06-08
申请号：US894194
申请日：1997-08-14
CPC分类号： H01S3/2383 , G02F1/3538 , H01S3/10076 , H01S3/2308
摘要： A phase locked phase conjugation system comprises a first (1) and a second (2) stimulated Brillouin scattering (SBS) cell. A laser beam is split into sub beams; one (9) is directed through the first SBS cell as a beam of collimated light and focused into the second SBS cell from which a phase conjugated beam is returned. One or more other sub beams (11, 12) are focused into the first SBS cell so that overlap occurs between focused sub beams and collimated beam. This provides a phase locked phase conjugated beam. Two or more sub beams are directed twice through laser amplifiers to provide an amplified phase locked phase conjugated beam. The second SBS cell may be a simple reflective cell operating on a focused laser sub beam, or may be an SBS loop arrangement having reflectors and lenses for causing optical feedback of the Brillouin scattered light.
摘要翻译： PCT No.PCT / GB96 / 00133 Sec。 371日期1997年8月14日 102（e）日期1997年8月14日PCT 1996年1月23日PCT公布。 公开号WO96 / 26561 日期1996年8月29日一种锁相相位共轭系统包括第一（1）和第二（2）受激布里渊散射（SBS）单元。 激光束分为子光束; 一个（9）被引导通过第一SBS单元作为准直光束并聚焦到第二SBS单元中，从该SBS单元返回相位共轭波束。 一个或多个其他子光束（11,12）被聚焦到第一SBS单元中，使得在聚焦的子光束和准直光束之间发生重叠。 这提供了一个锁相相共轭光束。 两个或多个子光束通过激光放大器定向两次以提供放大的锁相相位共轭光束。 第二SBS单元可以是在聚焦激光子波束上操作的简单反射单元，或者可以是具有用于引起布里渊散射光的光学反馈的反射器和透镜的SBS环路布置。
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2.发明授权Method of providing duplex optical communications and optical modulator therefor 有权提供双工光通信及其光调制器的方法公开(公告)号：US08135286B2
公开(公告)日：2012-03-13
申请号：US12090317
申请日：2006-10-19
CPC分类号： H04B10/1125
摘要： Methods of providing duplex free-space optical, communication comprising receiving a time-shift keying (TSK) encoded signal and selectively re-modulating—and optionally retro-reflecting —received TSK pulses so as to transmit an on-off keying (OOK) signal wherein modulation is achieved by operating a micro-opto-electronic mechanical system (MOEMS) device having a oscillation period, the difference in timing between logic 1 and logic 0 pulses of the TSK encoded signal being such that each pulse arrives at a time within a single MOEMS device oscillation period chosen to ensure high or low transmissivity through the MOEMS device independent of incident TSK encoded signal pulse value (0 or 1).
摘要翻译： 提供双工自由空间光学，通信的方法包括接收时移键控（TSK）编码信号，并选择性地重新调制和可选地反向反射接收的TSK脉冲，以便发送开 - 关键控（OOK）信号 其中通过操作具有振荡周期的微光电子机械系统（MOEMS）装置来实现调制，TSK编码信号的逻辑1和逻辑0脉冲之间的定时差使得每个脉冲到达一个 选择单个MOEMS器件振荡周期，以确保通过MOEMS器件的高或低透射率，独立于入射的TSK编码信号脉冲值（0或1）。
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公开(公告)号：US20080266553A1
公开(公告)日：2008-10-30
申请号：US12090537
申请日：2006-10-19
CPC分类号： G01B11/26
摘要： Apparatus and methods for detecting angle of incidence of an optical beam. The apparatus employs two optical detectors, the first of which has placed in front of it a coating or layer which exhibits an angle-dependent optical transmission characteristic distinct from that of the light path in front of the second detector. The difference in a characteristic of the light received at the respective detectors therefore provides an indication of the angle of incidence of the light beam. The angle detector may be used particularly, though not exclusively, in conjunction with free space optical communications systems.
摘要翻译： 用于检测光束入射角的装置和方法。 该装置采用两个光学检测器，其中第一个在其前方放置了一个涂层或层，其表现出与第二检测器前面的光路的角度相关的光传输特性。 因此，在各个检测器处接收的光的特性的差异提供了光束的入射角的指示。 角度检测器可以特别地使用，但不排他地结合自由空间光通信系统。
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公开(公告)号：US20110228895A1
公开(公告)日：2011-09-22
申请号：US13130914
申请日：2009-11-27
申请人： Kevin Dennis Ridley , Geoffrey Derek De Villiers , Christopher Williams Slinger , Malcolm John Alexander Strens
发明人： Kevin Dennis Ridley , Geoffrey Derek De Villiers , Christopher Williams Slinger , Malcolm John Alexander Strens
IPC分类号： G01N23/00
CPC分类号： G02B27/00 , G01J3/2846 , G01J4/04 , G02B2207/129 , G06K9/209 , H04N5/335 , H04N9/045 , H04N9/07
摘要： Optically diverse coded aperture imaging (CAI) includes imaging a scene which is multi-spectrally diverse or polarimetrically diverse. A CAI system allows light rays from a scene to pass to a detector array through a coded aperture mask within an optical stop. The mask has multiple apertures, and produces overlapping coded images of the scene on the detector array. Detector array pixels receive and sum intensity contributions from each coded image. The detector array provides output data for processing to reconstruct an image. The mask provides for multi-spectral information to become encoded in the data. A linear integral equation incorporating explicit wavelength dependence relates the imaged scene to the data. This equation is solved by Landweber iteration to derive a multi-spectral image. An image with multiple polarisation states (polarimetric diversity) may be derived similarly with a linear integral equation incorporating explicit polarisation dependence.
摘要翻译： 光学多样化编码孔径成像（CAI）包括对多光谱多样或多极化多样的场景进行成像。 CAI系统允许来自场景的光线通过光学停止器内的编码孔径掩模传递到检测器阵列。 掩模具有多个孔，并在检测器阵列上产生场景的重叠编码图像。 检测器阵列像素从每个编码图像接收和求和强度贡献。 检测器阵列提供用于处理以重建图像的输出数据。 掩模提供多光谱信息以便在数据中进行编码。 包含显式波长依赖性的线性积分方程将成像的场景与数据相关联。 该方程通过Landweber迭代求解得到多光谱图像。 具有多极化状态（偏振分集）的图像可以与包含明确的偏振依赖性的线性积分方程类似地导出。
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公开(公告)号：US20110129054A1
公开(公告)日：2011-06-02
申请号：US13057613
申请日：2009-07-30
申请人： Geoffrey Derek DE VILLIERS , Kevin Dennis RIDLEY , Christopher William SLINGER , Malcolm John Alexander STRENS
发明人： Geoffrey Derek DE VILLIERS , Kevin Dennis RIDLEY , Christopher William SLINGER , Malcolm John Alexander STRENS
IPC分类号： G01N23/00
CPC分类号： G06T3/4053 , G06T5/50 , G06T2200/21 , G06T2207/10052
摘要： A method of reconstructing an image of a scene (4) from data output by a detector (8) in a coded aperture imaging system (2) comprises taking multiple frames of data using a different coded aperture array 6 for each frame. For each frame of data a decoding pattern is employed which is point source diffraction pattern corresponding to the coded aperture array used to acquire that frame. The decoding patterns are combined in a Gram matrix. A two-dimensional to one-dimensional mapping is applied to the frames of data. A solution to the data is constructed which is related to the scene (4) by an integral operator. The integral operator has an averaging kernel with a main lobe width which is smaller than the detector pixel size. Processing of the data yields an image which has sub-pixel resolution, i.e. resolution greater than the native resolution of the detector (8).
摘要翻译： 根据编码孔径成像系统（2）中由检测器（8）输出的数据，重建场景（4）的图像的方法包括使用针对每个帧的不同编码孔径阵列6来获取多帧数据。 对于每个数据帧，采用与用于获取该帧的编码孔径阵列相对应的点源衍射图案的解码图案。 解码图案以Gram矩阵组合。 将二维至一维映射应用于数据帧。 通过积分算子构建与场景（4）相关的数据解。 积分算子具有平均内核，其主瓣宽度小于检测器像素大小。 数据的处理产生具有子像素分辨率的图像，即分辨率大于检测器（8）的固有分辨率。
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6.发明申请Method of Providing Duplex Optical Communications and Optical Modulator Therefor 有权提供双工光通信及其光调制器的方法公开(公告)号：US20080260380A1
公开(公告)日：2008-10-23
申请号：US12090317
申请日：2006-10-19
CPC分类号： H04B10/1125
摘要： Methods of providing duplex free-space optical, communication comprising receiving a time-shift keying (TSK) encoded signal and selectively re-modulating—and optionally retro-reflecting—received TSK pulses so as to transmit an on-off keying (OOK) signal. Related apparatus and signals are also provided.
摘要翻译： 提供双工自由空间光学，通信的方法包括接收时移键控（TSK）编码信号并选择性地重新调制并且可选地反向反射接收的TSK脉冲，以便发送开 - 关键控（OOK）信号 。 还提供了相关的装置和信号。
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