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公开(公告)号：US4385299A
公开(公告)日：1983-05-24
申请号：US199434
申请日：1980-10-22
申请人： Charles W. Earp, deceased , Clive D. Wickenden, executor , Rolf Johannessen , Francis G. Overbury
发明人： Charles W. Earp, deceased , Clive D. Wickenden, executor , Rolf Johannessen , Francis G. Overbury
CPC分类号： G01S1/465
摘要： An electronic navigation beacon, particularly for coastal navigation, in which an unmodulated carrier f.sub.c is transmitted from the first antenna of a pair of antennas, and a periodically modulated sideband f.sub.c .+-.f.sub.a is transmitted from both antennas, where f.sub.a is in the audio frequency domain. A cyclical RF phase variation is imposed on the sideband signal transmitted from the second antenna. The effect in space is that of a rotating radial having an audio frequency null, the periodic modulation providing the listener at a remote point with timing information enabling determination bearing as a function of the time of passage of the radial through the remote point relative to the start of rotation of the radial.
摘要翻译： 特别是用于沿海导航的电子导航信号，其中从两个天线发射天线，其中fa是在一个天线的第一天线中发射的未调制的载波fc，以及周期性调制的边带fc +/- fa，其中fa在音频频率 域。 对从第二天线发送的边带信号施加周期性RF相位变化。 在空间中的效果是具有音频为零的旋转径向的，周期性调制在远程点向听者提供定时信息，使得能够确定轴承作为径向通过远程点的时间相对于 径向开始旋转。
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公开(公告)号：US4384764A
公开(公告)日：1983-05-24
申请号：US185699
申请日：1980-09-10
IPC分类号： G02F1/19 , G02F1/1335 , G09F9/00 , G09F9/30
CPC分类号： G02F1/133524
摘要： A rear plate of a liquid-cell display device has louvers embedded therein that allow light to pass from the rear of the display device toward the front only at angles that will cause most or all of the light to be internally reflected at the front plate unless the light has been scattered by the light-scattering fluid of the device.
摘要翻译： 液晶显示装置的后板具有嵌入其中的百叶窗，其允许光从显示装置的后部朝向前方仅以将使得大部分或所有光在前板内部反射的角度的光通过，除非 光被器件的光散射流分散。
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公开(公告)号：US4372648A
公开(公告)日：1983-02-08
申请号：US201944
申请日：1980-10-29
申请人： Philip W. Black
发明人： Philip W. Black
CPC分类号： G02B6/03694 , C03C13/045 , G02B6/02042 , G02B6/032 , G02B6/03688 , Y10S65/16
摘要： A secure optical fibre consists of an inner waveguiding structure surrounded by an outer waveguiding structure and separated therefrom by an optical absorbing layer (3) rendered absorbing by irradiation. The inner waveguiding structure comprises a core (1) surrounded by a lower refractive index cladding layer (2). The outer waveguiding structure comprises an annular core layer (5) sandwiched between lower refractive index inner and outer cladding layers (4 and 6).
摘要翻译： 安全的光纤由外波导结构包围的内波导结构组成，并由通过照射吸收的光吸收层（3）分离。 内部波导结构包括被低折射率包层（2）包围的芯体（1）。 外波导结构包括夹在低折射率内包层（4和6）之间的环形芯层（5）。
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公开(公告)号：US4346382A
公开(公告)日：1982-08-24
申请号：US168183
申请日：1980-07-10
申请人： Henri J. Bosc , Pierre J. Goyard
发明人： Henri J. Bosc , Pierre J. Goyard
CPC分类号： G01S7/415
摘要： A monopulse radar system in which circuits are included for specific identification of echoes from helicopters vis-avis other echoes. The identification is based on either the large Doppler spectrum of a helicopter echo or the amplitude modulation thereof, or both. Embodiments are shown which utilize these criteria for identification as well as bearing refinement. The apparatus is effective, even when a helicopter is hidden from the full view of the radar by foliage.
摘要翻译： 一个单脉冲雷达系统，其中包括用于特定识别来自直升机的回声的电路可以进行其他回波。 该识别基于直升机回波的大多普勒频谱或其幅度调制，或两者。 示出了利用这些标准进行识别以及轴承细化的实施例。 该装置是有效的，即使当直升机被叶子从雷达的全景中隐藏时。
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公开(公告)号：US4346184A
公开(公告)日：1982-08-24
申请号：US206426
申请日：1980-11-13
申请人： Cyril F. Drake
发明人： Cyril F. Drake
CPC分类号： C09D5/084 , C03C3/16 , C03C3/17 , C03C4/0035
摘要： A corrosion inhibiting material comprises a water soluble zinc oxide/phosphorus pentoxide/alumina glass which, when in contact with water, releases ions which inhibit corrosion of adjacent metal surfaces. Advantageously the glass is finely ground and then dispersed in a resin carrier to form a paint. The glass composition is preferably 54.6 to 63.3 mol % zinc oxide, 35.8 to 45.3 mol % phosphorus pentoxide; the remainder at least 0.1 mol % aluminum oxide.
摘要翻译： 腐蚀抑制材料包括水溶性氧化锌/五氧化二磷/氧化铝玻璃，其在与水接触时释放离子，其抑制相邻金属表面的腐蚀。 有利地，玻璃被细磨，然后分散在树脂载体中以形成油漆。 玻璃组合物优选为54.6〜63.3摩尔％氧化锌，35.8〜45.3摩尔％五氧化二磷; 其余为至少0.1mol％的氧化铝。
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公开(公告)号：US4335934A
公开(公告)日：1982-06-22
申请号：US201943
申请日：1980-10-29
申请人： Philip W. Black , John Irven
发明人： Philip W. Black , John Irven
IPC分类号： C03B8/04 , C03B20/00 , C03B37/018 , C03C3/06 , C03C13/04 , G02B6/00 , G02B5/172 , C03B37/075
CPC分类号： C03B37/018 , C03C13/045 , C03B2203/24 , Y10S65/16
摘要： Single mode optical fibre for operation in the wavelength range 1.5 to 1.7 microns is made by depositing a cladding glass layer and then a core glass layer upon the bore of a silica substrate tube. The bore of the coated tube is then collapsed to form a solid cross-section optical fibre preform. The cladding glass has an index matching that of silica and either contains no oxide of phosphorus or the minimal amount to provide a low enough deposition temperature and high enough deposition rate to provide an acceptably low diffusion of hydroxyl groups from the material of the substrate tube. Optionally the deposition of the cladding may be preceded by the deposition of a diffusion barrier layer which may contain a higher proportion of oxide of phosphorus.
摘要翻译： 通过在二氧化硅衬底管的孔上沉积包层玻璃层，然后沉积核心玻璃层，制造在1.5至1.7微米波长范围内操作的单模光纤。 然后涂覆的管的孔被折叠以形成实心的横截面光纤预制件。 包层玻璃具有与二氧化硅匹配的指数，并且不含磷的氧化物或最小量，以提供足够低的沉积温度和足够高的沉积速率，以提供从衬底管材料的羟基可接受的低扩散。 可选地，包层的沉积之前可以沉积可能含有较高比例的磷氧化物的扩散阻挡层。
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公开(公告)号：US4333178A
公开(公告)日：1982-06-01
申请号：US212190
申请日：1980-12-02
CPC分类号： H04B10/43 , H04L1/0083 , H04L12/437
摘要： In a repeater for use in an optical fiber data transmission system of the closed-loop type, the input and output transducers each have a component which, depending on its biasing conditions, can act as a photo-detector or as a light-emitter. One such device is a light-emitting diode, which if reverse-biased acts as a photo-detector. With suitable switching this enables the realization of a reversible repeater. During normal operation, the direction of transmission is reversed at the end of each message received by a remote terminal, a reply message being sent during this period of reversal, after which the remote terminal reverts to normal operation. In the event of an interruption in message reception as detected at a remote terminal, the reversal of transmission direction also occurs, so that a line break in effect converts the system to two "one-way" systems.
摘要翻译： 在用于闭环型光纤数据传输系统的中继器中，输入和输出传感器各自具有根据其偏置条件可以用作光检测器或作为发光器的部件。 一种这样的装置是发光二极管，如果反向偏置作为光检测器。 通过适当的切换，可实现可逆中继器。 在正常操作期间，在远程终端接收到的每个消息结束时，传输方向相反，在该反转时段期间发送回复消息，之后远程终端恢复正常操作。 在远程终端检测到的消息接收中断的情况下，还发生传输方向的反转，从而线路故障有效地将系统转换为两个“单向”系统。
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公开(公告)号：US4329261A
公开(公告)日：1982-05-11
申请号：US125431
申请日：1980-02-28
申请人： Robert J. Kraushaar , Kevin B. Ward
发明人： Robert J. Kraushaar , Kevin B. Ward
IPC分类号： C07D243/08 , G02B5/24
CPC分类号： G02B5/24
摘要： Solutions of 2,7-dimethyl-diaza-(3,6)-cycloheptadien-(1,6)- perchlorate are used as liquid band pass filters for the transmission of U-V.
摘要翻译： 使用2,7-二甲基 - 二氮杂 - （3,6） - 环庚二烯 - （1,6） - 高氯酸盐的溶液作为用于传输U-V的液体带通滤波器。
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公开(公告)号：US4327965A
公开(公告)日：1982-05-04
申请号：US192391
申请日：1980-09-30
申请人： Philip W. Black
发明人： Philip W. Black
IPC分类号： C03B37/018 , C03C3/06 , C03C13/04 , G02B6/00 , G02B6/036 , C03B37/075 , G02B5/172
CPC分类号： G02B6/03661 , C03B37/018 , C03C13/045
摘要： Single mode optical fibre for operation in the wavelength range 1.5 to 1.7 microns is made by first depositing an optically absorbing layer of silica doped with oxides of boron and/or phosphorus upon the bore of a silica substrate tube. The optical absorbing layer has a higher refractive index than silica, and on it is deposited a transparent optical cladding layer of matched index, and then a higher index optical core layer. The bore of the coated tube is then collapsed to form a solid cross-section optical fibre preform from which optical fibre can be drawn.
摘要翻译： 通过首先将掺杂有硼和/或磷的氧化物的二氧化硅的光学吸收层沉积在二氧化硅衬底管的孔上来制造在1.5至1.7微米波长范围内操作的单模光纤。 光吸收层具有比二氧化硅更高的折射率，并且沉积具有匹配折射率的透明光学包覆层，然后沉积更高折射率的光芯层。 然后涂覆的管的孔被折叠以形成可以从其中拉出光纤的实心截面光纤预制件。
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公开(公告)号：US4322125A
公开(公告)日：1982-03-30
申请号：US66198
申请日：1979-08-13
申请人： Stanley W. Warren
发明人： Stanley W. Warren
摘要： An infra-red filter substrate surface is profiled to form an undulating pattern whose dimensions correspond to the operating wavelength. This prevents spurious reflections when the filter is subsequently provided with a protective coating.
摘要翻译： 红外滤色器基板表面被成型以形成其尺寸对应于工作波长的起伏图案。 这样当过滤器随后设置有保护涂层时，可以防止杂散反射。
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