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1. 发明授权

US4213706A Background compensating interferometer 失效
标题翻译：背景补偿干涉仪
公开(公告)号：US4213706A
公开(公告)日：1980-07-22
申请号：US826024
申请日：1977-08-19
申请人： Henry A. Hill , John W. Figoski , Paul T. Ballard
发明人： Henry A. Hill , John W. Figoski , Paul T. Ballard
IPC分类号： G01J9/02 , G01N21/46
CPC分类号： G01J9/02
摘要： A device for reducing the effects of scattered light in an optical instrument utilizes an interferometer for interfering the scattered light and placing the image of the desired object within a dark fringe of the scattered light interference pattern to increase the contrast between the image of the desired object and the background.
摘要翻译：用于减少光学仪器中散射光的影响的装置利用干涉仪来干扰散射光并将所需物体的图像放置在散射光干涉图案的暗边缘内，以增加所需对象的图像之间的对比度和背景。

2. 发明授权

US4397558A System for reducing the effects of background radiation 失效
标题翻译：降低背景辐射影响的系统
公开(公告)号：US4397558A
公开(公告)日：1983-08-09
申请号：US238058
申请日：1981-03-02
申请人： Henry A. Hill , Paul T. Ballard
发明人： Henry A. Hill , Paul T. Ballard
IPC分类号： H01P3/20 , G01R29/26 , G01S3/78 , G01S3/781 , G02B23/00 , G02B27/42 , H01Q15/24 , H01Q19/00 , G02B9/02
CPC分类号： G02B27/0018 , G01R29/26 , G02B27/42 , G02B27/4233
摘要： A system for reducing the effects of background radiation on a desired signal includes a plurality of physically spaced phase shifters arranged in a two-dimensional array and disposed in the path of the desired signal for cancelling the background radiation while passing the desired signal without substantial attentuation. In a second embodiment, the desired signal is split into two beams which traverse different paths and passed through two complementary two-dimensional arrays of physically spaced attenuators, each array being disposed in one of the paths. A phase shifter is disposed in one or both of the paths and the signals from the two paths are recombined to cancel the background radiation. The two-dimensional arrays of physically spaced phase shifters may be integrated into the beam splitters.
摘要翻译：用于减少背景辐射对期望信号的影响的系统包括以二维阵列布置并设置在所需信号的路径中的多个物理间隔移相器，用于抵消背景辐射，同时通过期望的信号而没有实质的注意。在第二实施例中，期望的信号被分成两束横穿不同的路径并穿过物理间隔的衰减器的两个互补的二维阵列，每个阵列设置在一条路径中。一个移相器设置在一个或两个路径中，并且来自两个路径的信号被重组以取消背景辐射。物理间隔移相器的二维阵列可以集成到分束器中。

3. 发明授权

US4304464A Background compensating interferometer 失效
标题翻译：背景补偿干涉仪
公开(公告)号：US4304464A
公开(公告)日：1981-12-08
申请号：US109632
申请日：1980-01-04
申请人： Henry A. Hill , John W. Figoski , Paul T. Ballard
发明人： Henry A. Hill , John W. Figoski , Paul T. Ballard
IPC分类号： G01J9/02 , G02B5/00
CPC分类号： G01J9/02
摘要： A device for reducing the effects of scattered light in an optical instrument utilizes an interferometer for interfering the scattered light and placing the image of the desired object within a dark fringe of the scattered light interference pattern to increase the contrast between the image of the desired object and the background.
摘要翻译：用于减少光学仪器中散射光的影响的装置利用干涉仪来干扰散射光并将所需物体的图像放置在散射光干涉图案的暗边缘内，以增加所需对象的图像之间的对比度和背景。

4. 发明授权

US6111644A Interferometer for detecting and analyzing coherent radiation 失效
标题翻译：用于检测和分析相干辐射的干涉仪
公开(公告)号：US6111644A
公开(公告)日：2000-08-29
申请号：US549645
申请日：1983-11-07
申请人： Paul T. Ballard
发明人： Paul T. Ballard
IPC分类号： G01J3/453 , G01J9/02 , G01B9/02
CPC分类号： G01J3/4531 , G01J9/02 , G01J9/0246
摘要： Incoming optical radiation is divided into two focused beams with a relatively large amount of delay and shift introduced between the beams. Through the focusing of each of the beams to a different focal point (F1), (F2) a lead is created such that a circular or bull's-eye fringe pattern (60) is formed in a plane of observation (45). The position of the fringe pattern with respect to the output optical axis of the device is a function of the angle (.theta.) of the incoming coherent radiation with respect to the input optical axis of the device. The spacing of the fringe rings is a function of the frequency of the coherent radiation and the intensity of the fringe pattern is a function of the intensity and coherency of the beam of coherent radiation. The interferometer of the invention has a wide angle of reception and no moving parts.
摘要翻译：进入的光辐射被分成两个聚焦光束，其具有在光束之间引入相对较大量的延迟和偏移。通过每个光束的聚焦到不同的焦点（F1），（F2）产生引线，使得在观察平面（45）中形成圆形或牛眼条纹图案（60）。条纹图案相对于装置的输出光轴的位置是输入的相干辐射相对于装置的输入光轴的角度（θ）的函数。边缘环的间距是相干辐射的频率的函数，并且条纹图案的强度是相干辐射束的强度和相干性的函数。本发明的干涉仪具有广泛的接收角度，没有移动部件。

5. 发明授权

US4631454A Quasi-resonant random access deflection system for a calligraphic display monitor 失效
标题翻译：用于书法显示监视器的准谐振随机存取偏转系统
公开(公告)号：US4631454A
公开(公告)日：1986-12-23
申请号：US715519
申请日：1985-03-25
申请人： Paul T. Ballard
发明人： Paul T. Ballard
IPC分类号： G09G1/04 , H01J29/70
CPC分类号： G09G1/04
摘要： A quasi-resonant random access deflection system includes a biresonant, bidirectional deflection circuit connected to the deflection yoke of a display monitor picture tube and a control circuit connected to the deflection circuit and being operable to generate signals to actuate the deflection circuit so as to cause, via the magnetic fields of the deflection yoke, selected movement of the electron beam of the picture tube along a bidirectional path and stopping of the beam at any position along the bidirectional path.
摘要翻译：准谐振随机存取偏转系统包括连接到显示监视器显像管的偏转线圈的双向双向偏转电路和连接到偏转电路的控制电路，并且可操作以产生用于致动偏转电路的信号，从而导致通过偏转线圈的磁场，沿着双向路径选择显像管的电子束的移动，并且沿着双向路径在任何位置停止光束。

6. 发明授权

US4515478A Coherent light detecting system including passive averaging network 失效
标题翻译：相干光检测系统包括无源平均网络
公开(公告)号：US4515478A
公开(公告)日：1985-05-07
申请号：US439475
申请日：1982-11-05
申请人： Paul T. Ballard , Gordon R. Little
发明人： Paul T. Ballard , Gordon R. Little
IPC分类号： G01B9/02 , G01D3/06 , G01J9/02
CPC分类号： G01D3/063 , G01J9/02
摘要： Interference patterns are generated in response to temporally coherent light incident upon an interferometer which directs the interference patterns upon an array of photosensitive elements. The photosensitive elements are connected to generate signals representative of the optical energy respectively incident on the elements. The output signals of the photosensitive elements are averaged by a passive resistor network coupled to the photosensitive elements and the signals generated by the individual elements are compared to the average signal by individual comparator circuits to detect the presence and position of an interference pattern directed upon the array.
摘要翻译：响应于入射到干涉仪上的时间相干光产生干涉图案，该干涉仪将干涉图案引导到感光元件阵列上。光敏元件被连接以产生表示分别入射到元件上的光能的信号。感光元件的输出信号被耦合到光敏元件的无源电阻网络平均，并且由各个元件产生的信号与各个比较器电路的平均信号进行比较，以检测针对该光敏元件的干涉图案的存在和位置数组。

7. 发明授权

US4470696A Laser doppler velocimeter 失效
标题翻译：激光多普勒测速仪
公开(公告)号：US4470696A
公开(公告)日：1984-09-11
申请号：US311216
申请日：1981-10-14
申请人： Paul T. Ballard
发明人： Paul T. Ballard
IPC分类号： G01P3/36 , G01S17/58
CPC分类号： G01P3/366 , G01S17/58
摘要： Reflections, having positive and negative Doppler frequency shifts, from a laser beam directed at a moving surface are passed through spatial filters, combined by a beam splitter, and focussed on an observation plane of a photodetector to provide a fringe pattern having an amplitude variation frequency responsive to the velocity of the moving surface. The laser beam may be a single beam directed substantially perpendicularly to the moving surface, or the laser beam may be divided into two beams angled toward the surface, one beam impinging with the direction of motion of the surface and the other beam impinging against the direction of motion. When two impinging beams, split from a common beam, are utilized, different polarizations and beam impingement points on the surface may be used to provide beam isolation between the beam signals. Homodyne detection with single frequency lasers is used. With multi-mode lasers emitting two separate frequencies of radiation, heterodyne detection may be used to provide better resolution at low surface velocities.
摘要翻译：来自定向在移动表面上的激光束具有正和负多普勒频移的反射通过由分束器组合的空间滤波器，并聚焦在光电检测器的观察平面上，以提供具有幅度变化频率的条纹图案响应于移动表面的速度。激光束可以是基本上垂直于移动表面指向的单个光束，或者激光束可以被分成朝向表面成角度的两个光束，一个光束撞击表面的运动方向，另一个光束撞击方向的运动。当使用从公共光束分离的两个入射光束时，可以使用表面上的不同偏振和光束冲击点来提供光束信号之间的光束隔离。使用单频激光器进行同步检测。使用发射两个单独的辐射频率的多模式激光器，可以使用外差检测来在低表面速度下提供更好的分辨率。

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