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1. 发明授权

US07298908B2 Method and apparatus for detecting the presence of one or more images of a known predetermined kind of scene 有权
标题翻译：用于检测已知预定类型的场景的一个或多个图像的存在的方法和装置
公开(公告)号：US07298908B2
公开(公告)日：2007-11-20
申请号：US10314415
申请日：2002-12-09
申请人： Meirion F. Lewis , Brian S. Lowans , Rebecca A. Wilson
发明人： Meirion F. Lewis , Brian S. Lowans , Rebecca A. Wilson
IPC分类号： G06K9/76
CPC分类号： G06K9/74 , G06E1/02
摘要： An apparatus for detecting the presence of one or more images of a known kind in a scene is disclosed which comprises a digital input means and an optical output means. The digital input means comprises a capture means which passes a capture image to a first electronic processing means to produce a scene pattern corresponding to a Fourier Transform of the scene image. This pattern is then digitally combined with one or more reference patterns corresponding to Fourier Transforms of a reference image. The resulting combined patterns are then used to modulate a beam of light which may be focused to perform an inverse Fourier Transform providing correlation information. In a preferred embodiment, the combined pattern is displayed on a spatial light modulator. A “smart” spatial light modulator is also disclosed which comprises an array of light modulating devices, each device comprising a detector and at least one pixel, whereby light incident upon the detector produces an output signal which is adapted to control the state of the modulating medium. By suitable processing, the “smart” SLM may be adapted to either attenuate light below a certain intensity or only light above a certain intensity to act as a saturable absorber.
摘要翻译：公开了一种用于在场景中检测已知类型的一个或多个图像的存在的装置，其包括数字输入装置和光输出装置。数字输入装置包括捕获装置，其将捕获图像传送到第一电子处理装置，以产生与场景图像的傅里叶变换相对应的场景模式。然后将该图案与对应于参考图像的傅里叶变换的一个或多个参考图案数字组合。所得到的组合图案然后用于调制可以被聚焦以提供相关信息的傅立叶逆变换的光束。在优选实施例中，组合图案显示在空间光调制器上。还公开了一种“智能”空间光调制器，其包括光调制装置的阵列，每个装置包括检测器和至少一个像素，由此入射到检测器上的光产生输出信号，该输出信号适于控制调制的状态中。通过适当的处理，“智能”SLM可以适于衰减低于一定强度的光或仅将光强于某一强度以作为可饱和吸收体。

2. 发明授权

US4642506A Surface acoustic wave device with reflectors in inter-electrode location 失效
标题翻译：具有反电极的表面声波器件在电极间位置
公开(公告)号：US4642506A
公开(公告)日：1987-02-10
申请号：US660234
申请日：1984-10-12
申请人： Meirion F. Lewis
发明人： Meirion F. Lewis
IPC分类号： H03H3/08 , H03H9/02 , H03H9/145 , H01L41/08
CPC分类号： H03H9/643 , H03H9/0274 , H03H9/14505
摘要： An acoustic transducer is arranged as a ladder having uprights and rungs consisting of contact pads and interdigital fingers respectively. The transducer has inter-rung spaces 17 occupied by arrays of reflector strips. Each reflector strip is offset by .lambda./8 from a respective position distant 1/2n.lambda. from a transducer finger center, .lambda. being the transducer finger center and n as integer. The .lambda./8 offset reflector strips provide constructive interference between transducer output waves travelling in one direction and destructive interference in the opposite direction. This provides a transducer with undirectional properties which can be manufactured in one metal deposition process. Unwanted reflections at fingers may be reduced by additional blooming reflector banks or by repositioning reflector strips to provide both unidirectional and blooming properties. Other options include variation in spatial periodicity, overlap, length, width and/or number of reflector strips and/or transducer fingers.
摘要翻译：声学换能器被布置为具有分别由接触垫和叉指形成的立柱和梯级的梯子。传感器具有由反射器条阵列占据的间隔空间17。每个反射器条从与换能器指中心相距1 /2nλ的相应位置被λ/ 8偏移，λ为换能器指中心，n为整数。 λ/ 8偏移反射条在一个方向上传播的传感器输出波和相反方向的相消干涉提供了建设性的干扰。这提供了可以在一个金属沉积工艺中制造的具有不定向特性的换能器。手指处的不需要的反射可以通过附加的起霜反射器组减少，或者通过重新定位反射器条来提供单向和开放性质。其他选项包括反射条和/或换能器指的空间周期，重叠，长度，宽度和/或数量的变化。

3. 发明授权

US4628222A Protection of saw devices comprising metallized regions on dielectric substrates 失效
标题翻译：保护在电介质基板上包括金属化区域的锯装置
公开(公告)号：US4628222A
公开(公告)日：1986-12-09
申请号：US585166
申请日：1984-03-01
申请人： Meirion F. Lewis
发明人： Meirion F. Lewis
IPC分类号： H03H3/08 , H01L21/306 , H01L41/22 , H03H9/02 , H03H9/145 , H03H9/25 , H03H9/72 , B05D5/12
CPC分类号： H01L41/29 , H03H9/02921 , Y10T29/42
摘要： In devices comprising closely spaced metallized regions deposited upon a dielectric substrate, in particular acoustic wave devices, electric fields may arise between the regions due to pyroelectric effects or acquired static charges during production or subsequently. These fields can cause damage by arcing or cracking of the substrate. The present method overcomes this problem by providing resistive links between such regions so that the fields do not arise. Preferably the links are of metallizing formed simultaneously with the metallized regions. Application to a SAW convolver is described in which the links are strips of metallizing (7,8,9).

4. 发明授权

US06661361B1 High speed optical analog to digital converter and digital optical wavemeter 有权
标题翻译：高速光模拟数字转换器和数字光波表
公开(公告)号：US06661361B1
公开(公告)日：2003-12-09
申请号：US09980276
申请日：2002-04-23
申请人： Meirion F. Lewis , Alan Johnstone
发明人： Meirion F. Lewis , Alan Johnstone
IPC分类号： H03M100
CPC分类号： G01J9/0246 , G02F7/00 , G02F2001/212 , H03M1/34
摘要： An optical analogue to digital (A/D) converter for converting an input analogue voltage signal into a digital output, comprising means for frequency modulating an optical signal with an input analogue voltage signal, delay means for splitting the frequency modulated optical signal and generating at least one differentially delayed signal and at least one reference signal, at least one combining means arranged to combine the or one of the delayed optical signals with the or one of the reference signals, and at least one converter means for converting a combined signal output from an associated one of the combining means to a digital code. Also provided is a digital optical wavemeter for generating a digital representation of the wavelength of an input optical signal, comprising delay means for splitting the input optical signal and generating at least one differentially delayed optical signal and at least one reference signal, at least one combining means arranged to combine the or one of the delayed optical signals with the or one of the reference signals, and at least one converter means for converting a combined signal output from an associated one of the combining means to a digital signal.
摘要翻译：一种用于将输入模拟电压信号转换为数字输出的光模拟数字（A / D）转换器，包括用于利用输入模拟电压信号对光信号进行频率调制的装置，用于分频调频光信号并在至少一个差分延迟信号和至少一个参考信号，至少一个组合装置，被布置成将所述延迟光信号中的一个或其中之一或者一个参考信号组合在一起，以及至少一个转换器装置，将组合装置中的一个与数字代码相关联。还提供了一种用于产生输入光信号的波长的数字表示的数字光波计，包括用于分离输入光信号并产生至少一个差分延迟的光信号和至少一个参考信号的延迟装置，至少一个组合用于将延迟的光信号中的一个或其中之一与参考信号中的一个或其中一个组合的装置，以及用于将从组合装置中的相关一个输出的组合信号转换为数字信号的至少一个转换器装置。

5. 再颁专利

USRE35204E Acoustic wave devices employing surface skimming bulk waves 失效
标题翻译：采用表面抛光体波的声波装置
公开(公告)号：USRE35204E
公开(公告)日：1996-04-09
申请号：US412447
申请日：1995-03-29
申请人： Meirion F. Lewis
发明人： Meirion F. Lewis
IPC分类号： H03H3/08 , H01L41/00 , H03H9/00 , H03H9/02 , H03H9/25 , H03H9/30 , H03H9/38 , H01L41/08
CPC分类号： H03H9/02559 , H03H9/02236 , H03H9/02551 , H03H9/30
摘要： An acoustic wave device employing surfaces skimming bulk waves comprises a piezo electric substrate having a flat surface which carries an input transducer and an output transducer for respectively lanuching and receiving acoustic waves into and from the bulk of the substrate. The substrate may be of quartz, lithium tantalate, or lithium niobate and has the flat surface orientated so that a surface skimming bulk wave is launched without generation of surface acoustic waves.
摘要翻译：采用表面扫描体波的声波装置包括具有平坦表面的压电基板，该平坦表面承载输入换能器和输出换能器，用于分别地将声波接收和接收到基体的本体中并从该基底的大部分接收声波。衬底可以是石英，钽酸锂或铌酸锂，并且具有取向的平坦表面，使得发射表面扫描体波而不产生表面声波。

6. 发明授权

US5210763A Oscillator 失效
标题翻译：振荡器
公开(公告)号：US5210763A
公开(公告)日：1993-05-11
申请号：US855031
申请日：1992-05-06
申请人： Meirion F. Lewis , David R. Wight
发明人： Meirion F. Lewis , David R. Wight
IPC分类号： G02B6/04 , H03B5/00 , H03B17/00
CPC分类号： H03B17/00
摘要： A single frequency oscillator (10) comprises a laser diode (12), a fibre optic bundle (22) acting as a delay line filter, a photodiode (26) and a feedback loop to the laser diode (12) containing an amplifier (28) and additional low Q filtering (29, 34). The laser diode output (18) bears a modulation signal which is filtered to a series of "resonant" or synchronous frequencies by the bundle (22), converted back to an electrical signal by the diode (26) amplified, and reduced to a single resonant frequency by the low Q filtering (29, 34). It is then applied to the laser diode (12) as positive feedback to modulate the diode output (18). The output of the oscillator (10) can be taken as a microwave signal or on an optical carrier. The invention provides an oscillator incorporating feedback on an optical carrier.
摘要翻译： PCT No.PCT / GB90 / 01539 Sec。 371日期：1992年5月6日 102（e）日期1992年5月6日PCT提交1990年10月5日PCT公布。公开号WO91 / 05403 日期：1991年4月18日。单频振荡器（10）包括激光二极管（12），用作延迟线滤波器的光纤束（22），光电二极管（26）和到激光二极管 12）包含放大器（28）和附加的低Q滤波（29,34）。激光二极管输出（18）承载调制信号，该调制信号被束（22）滤波成一系列“共振”或同步频率，并被放大的二极管（26）转换成电信号，并被简化为单谐振频率由低Q滤波（29,34）。然后将其作为正反馈施加到激光二极管（12）以调制二极管输出（18）。振荡器（10）的输出可以作为微波信号或光载波。本发明提供了一种在光载波上并入反馈的振荡器。

7. 发明授权

US4272742A Acoustic wave devices with temperature stabilization 失效
标题翻译：具有温度稳定性的声波装置
公开(公告)号：US4272742A
公开(公告)日：1981-06-09
申请号：US077703
申请日：1979-09-21
申请人： Meirion F. Lewis
发明人： Meirion F. Lewis
IPC分类号： H03H3/08 , H03H3/10 , H03H9/02 , H03H9/145 , H03H9/42 , H03H9/64 , H01L41/18 , H03H9/25 , H03H9/68
CPC分类号： H03H9/6489 , H03H9/02834 , H03H9/1455 , H03H9/14594 , H03H9/6486 , H03H9/14547
摘要： An acoustic wave device comprises a substrate carrying two or more acoustic components aligned in different directions and electrically connected together in parallel. The phase slope of the acoustic components are similar but their temperature coefficients of delay are different whereby their resultant frequency response is compensated over a useful temperature range. The acoustic components may be delay line employing surface waves or surface skimming bulk waves, or one or two port resonators using surface waves.
摘要翻译：声波装置包括承载两个或更多个在不同方向上对准并且并联电连接在一起的声部件的基板。声学分量的相位斜率是相似的，但它们的延迟温度系数是不同的，因此它们的合成频率响应在有用的温度范围内被补偿。声学分量可以是使用表面波或表面划分体波的延迟线，或者使用表面波的一个或两个端口谐振器。

8. 发明授权

US06204941B1 Optical filtering device 失效
标题翻译：光学过滤装置
公开(公告)号：US06204941B1
公开(公告)日：2001-03-20
申请号：US08745178
申请日：1996-11-07
申请人： Marc I J Beale , Meirion F Lewis
发明人： Marc I J Beale , Meirion F Lewis
IPC分类号： G01J306
CPC分类号： G02B26/00 , G01J3/02 , G01J3/0229 , G01J3/16 , G02B5/20 , G02B5/203
摘要： An optical filtering device incorporates first and second prisms, the latter prism counteracting the angular dispersion of the former prism. A spatial light modulator provides a positionally variable optical stop located to block radiation within a wavelength interval and received from a location within a scene. Unobscured radiation from that and other scene locations passes to a camera, which produces an image on a display. Opaque pixels in the stop are positioned to block unwanted light sources. The invention attenuates potentially dazzling monochromatic radiation while retaining radiation at other wavelengths for imaging purposes.
摘要翻译：光学滤波装置包括第一和第二棱镜，后者的棱镜抵消前棱镜的角度色散。空间光调制器提供位置可变的光学停止器，其位于阻挡波长间隔内的辐射并且从场景内的位置接收。来自那个和其他场景位置的未遮挡的辐射传递到相机，其在显示器上产生图像。挡块上的不透明像素被定位成阻挡不需要的光源。本发明减少了潜在的耀眼的单色辐射，同时保持在其他波长的辐射用于成像目的。

9. 发明授权

US5307140A Optical time domain reflectometer with improved sidelobe suppression 失效
标题翻译：光学时域反射仪，具有改进的旁瓣抑制
公开(公告)号：US5307140A
公开(公告)日：1994-04-26
申请号：US862756
申请日：1992-06-24
申请人： Meirion F. Lewis
发明人： Meirion F. Lewis
IPC分类号： G01J1/42 , G01M11/00 , G01N21/88
CPC分类号： G01M11/3172
摘要： An optical time domain reflectometer incorporates a pulse expander (16) arranged to frequency disperse short duration pulses (14) from a pulse generator (12). The pulse expander (16) is a surface acoustic wave (SAW) filter. The frequency dispersed pulses (18) have long duration, and when amplified are employed to modulate the optical output of a laser diode (24). The optical output is fed to an optical fibre (32) for conventional time domain reflectometry measurements, and return signals are detected conventionally. The detected signals are transformed to short pulses (52) by a second SAW filter arranged as a pulse compressor (36).
摘要翻译： PCT No.PCT / GB90 / 02007 Sec。 371日期：1992年6月24日 102（e）日期1992年6月24日PCT 1990年12月21日PCT PCT。 WO91 / 10121 PCT出版物日期1991年7月11日。光学时域反射计包括布置成从脉冲发生器（12）频率分散短持续时间脉冲（14）的脉冲扩展器（16）。脉冲扩展器（16）是表面声波（SAW）滤波器。频率分散脉冲（18）具有长的持续时间，并且当被放大以调制激光二极管（24）的光输出时。光输出被馈送到用于常规时域反射测量的光纤（32），并且传统地检测返回信号。通过布置为脉冲压缩机（36）的第二SAW滤波器将检测到的信号变换成短脉冲（52）。

10. 发明授权

US08078663B2 Optical correlation apparatus and method 有权
标题翻译：光学相关装置及方法
公开(公告)号：US08078663B2
公开(公告)日：2011-12-13
申请号：US11664348
申请日：2005-10-18
申请人： Rebecca A Wilson , Meirion F Lewis , Andrew C Lewin
发明人： Rebecca A Wilson , Meirion F Lewis , Andrew C Lewin
IPC分类号： G06E3/00
CPC分类号： G06E3/00 , G06K9/745
摘要： This invention relates to a pattern recognition correlator and method for correlating input data with one or more reference data sets. The input data, which may be for instance digital amplitude modulated optical data, is used to modulate an optical signal to form a phase modulated optical signal. This temporal phase modulated optical signal is then converted into a parallel optical phase signal, preferably through use of an optical delay, and modulated by an optical phase modulator. When there is a correlation between the input data and the reference data the emerging wavefront is plane and can be strongly coupled to a detector. In the absence of correlation the emergent wavefront is not plane and so is not coupled as strongly to the detector. The detector output can therefore be used as an indication of correlation.
摘要翻译：本发明涉及一种用于将输入数据与一个或多个参考数据集相关联的模式识别相关器和方法。可以使用输入数据（例如数字调幅光学数据）来调制光信号以形成相位调制光信号。该时间相位调制光信号然后被优选地通过使用光学延迟并被光相位调制器调制而转换成并行光相位信号。当输入数据和参考数据之间存在相关性时，出现的波前是平面的并且可以强耦合到检测器。在没有相关性的情况下，出现的波前不是平面的，因此不像检测器那样强烈耦合。因此，检测器输出可以用作相关指示。

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