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公开(公告)号：US3961283A
公开(公告)日：1976-06-01
申请号：US558612
申请日：1975-03-14
IPC分类号： H01S3/03
CPC分类号： H01S3/0315
摘要： A waveguide gas laser is disclosed wherein narrow resonances in the loss vs. wavelength characteristics of a hollow waveguide laser resonator are employed to achieve wavelength selectivity. The laser includes a capillary bore waveguide of radius a and length 2L (or length L in a half-symmetric arrangement) which contains a laser gas having a laser transition capable of providing stimulated emission of light at wavelength .lambda.. The aforementioned loss resonances are achieved when the waveguide dimensions and the wavelength .lambda. are of preselected values satisfying the relation ##EQU1## where N is a positive integer.
摘要翻译： 公开了一种波导气体激光器，其中使用中空波导激光谐振器的损耗与波长特性的窄谐振来实现波长选择性。 激光器包括半径a和长度为2L（或半对称布置的长度L）的毛细管孔波导，其包含具有能够提供波长λ的受激发射的激光转换的激光气体。 当波导尺寸和波长λ为满足关系a2 1 =，λL 8N的预选值时，上述损耗谐振是实现的，其中N是正整数。
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公开(公告)号：US5652596A
公开(公告)日：1997-07-29
申请号：US532371
申请日：1995-09-22
申请人： Richard L. Abrams , Jan Grinberg , K. C. Lim , Ronald I. Wolfson
发明人： Richard L. Abrams , Jan Grinberg , K. C. Lim , Ronald I. Wolfson
CPC分类号： H01Q3/14 , H01Q1/3233 , H01Q13/28
摘要： A compact scanned antenna which includes a radiator, a rotatable tube and a line source. The radiator is formed by plating a shaped dielectric core. It generates an antenna beam at an output aperture in response to a microwave signal at an input port. The line source generates a radiation sheet which is directed across a signal plane to the input pot. The tube has a cylindrical wall which is positioned across the signal plane. As the tube rotates, refractive or diffractive transmission structures pass through the signal plane. The refractive structures include linear segments which refract the wavefront of the radiation sheet. Because the wavefront slope at the radiator's aperture is a function of the wavefront slope at its input port, the antenna beam is scanned. The linear contour segments have the same inclination but are not colinear. This arrangement reduces the thickness of the tube wall. Phase coherence is achieved by an appropriate radial spacing of adjacent ends of contour segments. The diffractive structures are arranged to vary the spacing of diffraction rings as they pass through the signal plane. This produces scanned, first-order antenna beams. The line source is adapted to direct a predetermined one of these beams into the radiator.
摘要翻译： 一种紧凑的扫描天线，其包括散热器，可旋转管和线源。 散热器通过镀成形介质芯形成。 它响应于输入端口处的微波信号而在输出孔径处产生天线波束。 线源产生辐射片，其被引导到信号平面到输入端。 该管具有横跨信号平面定位的圆柱形壁。 当管旋转时，折射或衍射透射结构通过信号平面。 折射结构包括折射辐射片的波前的线段。 因为散热器孔径处的波前斜率是其输入端口处的波前斜率的函数，所以天线波束被扫描。 线性轮廓段具有相同的倾斜度，但不是共线的。 这种布置减小了管壁的厚度。 相位相干是通过轮廓段的相邻端的适当的径向间距实现的。 衍射结构被布置成当衍射环通过信号平面时改变衍射环的间隔。 这产生扫描的一阶天线波束。 线源适于将这些光束中的预定的一个引导到散热器中。
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13.发明授权Smart antenna system using microelectromechanically tunable dipole antennas and photonic bandgap materials 失效使用微机电可调谐偶极天线和光子带隙材料的智能天线系统
公开(公告)号：US5541614A
公开(公告)日：1996-07-30
申请号：US416621
申请日：1995-04-04
CPC分类号： H01Q11/10 , H01Q15/002 , H01Q15/0066 , H01H59/0009
摘要： An antenna system includes a set of symmetrically located center-fed and segmented dipole antennas embedded on top of a frequency selective photonic bandgap crystal. A two-dimensional array of microelectromechanical (MEM) transmission line switches is incorporated into the dipole antennas to connect the segments thereof. An MEM switch is located at the intersection between any two adjacent segments of the antenna arm. The segments can be connected (disconnected) by operating the switch in the closed (open) position. Appropriate manipulation or programming of the MEM switches will change the radiation pattern, scanning properties and resonance frequency of the antenna array. In addition, an MEM switch is inserted into the crystal to occupy a lattice site in the 3-dimensional crystal lattice. The crystal will have a broadband stopgap if the MEM switch operates in the closed position (perfect symmetry of the crystal), and will produce a narrowband absorption line inside the stopgap if the MEM switch is in the open position, thereby permitting change in real time of the frequency response of the crystal.
摘要翻译： 天线系统包括嵌入在频率选择性光子带隙晶体顶部的对称定位的中心馈电和分段偶极天线的集合。 将微机电（MEM）传输线开关的二维阵列并入到偶极天线中以连接它们的段。 MEM开关位于天线臂的任何两个相邻段之间的相交处。 通过在闭合（打开）位置操作开关可以将段连接（断开）。 对MEM开关的适当的操作或编程将改变天线阵列的辐射图，扫描特性和谐振频率。 另外，将MEM开关插入到晶体中以占据3维晶格中的晶格位置。 如果MEM开关工作在闭合位置（晶体的完美对称性），则晶体将具有宽带停止点，并且如果MEM开关处于打开位置，将在停止位置内产生窄带吸收线，从而允许实时改变 的晶体的频率响应。
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14.发明授权
公开(公告)号：US5308395A
公开(公告)日：1994-05-03
申请号：US878358
申请日：1992-06-04
申请人： Neil A. Burditt , Richard L. Abrams
发明人： Neil A. Burditt , Richard L. Abrams
CPC分类号： C08J3/226 , C08L93/04 , C08J2493/00
摘要： Liquid concentrates for incorporation into polymeric resins are described that are storage stable and resistant to settling or viscosity changes which comprise:(I) a vehicle comprising:(A) at least one organic rosin material;(B) at least one surfactant; and(II) at least one colorant or additive.The liquid concentrates of the present invention have a body or consistency that allow them to readily flow by gravity and are further characterized by a substantially uniform viscosity. The liquid color concentrates of the present invention also are compatible with a wide variety of plastics and facilitate a reduction in processing deficiencies such as screw-slippage, water carry-over and uneven flow to the pump inlet.
摘要翻译： 描述了用于结合到聚合物树脂中的液体浓缩物，其是储存稳定的并且耐沉降或粘度变化，其包含：（I）载体，其包含：（A）至少一种有机松香材料; （B）至少一种表面活性剂; 和（II）至少一种着色剂或添加剂。 本发明的液体浓缩物具有允许它们容易地通过重力流动的主体或稠度，并且进一步的特征在于基本均匀的粘度。 本发明的液体颜料浓缩物也与各种各样的塑料兼容，并且有助于减少加工缺陷，例如螺杆滑动，水携带和不均匀的流入泵入口。
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公开(公告)号：US4494827A
公开(公告)日：1985-01-22
申请号：US435522
申请日：1982-10-20
IPC分类号： G02F1/03
CPC分类号： G02F1/03 , G02F1/0305
摘要： An imaging apparatus which permits the use of a transverse electrode electro-optic tunable filter (TEOTF), despite its obscured aperture, to produce a high quality image. The imaging apparatus includes a suitable conventional anamorphic input optical system in combination with a stacked plurality of TEOTFs in which the platelet of each TEOTF is made of an electro-optic material of a known index of refraction (such as CdS of an index of .about.2.4), and is clad between its surface and its electrodes with a material having a lower index of refraction than the platelet material (such as SiO.sub.2 of an index of .about.1.5).
摘要翻译： 尽管其遮蔽的孔径，允许使用横向电极电光可调滤波器（TEOTF）的成像设备产生高质量的图像。 成像设备包括合适的常规变形输入光学系统与多个TEOTF的堆叠组合，其中每个TEOTF的血小板由已知折射率的电光材料制成（例如DIFFERENCE 2.4的指数的CdS ），并且其表面和其电极之间的折射率比片状材料（如DIFFERENCE 1.5的指数的SiO 2）折射率低的材料包覆。
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公开(公告)号：US4297704A
公开(公告)日：1981-10-27
申请号：US66199
申请日：1979-08-13
摘要： Apparatus is provided comprising a laser source, collimating optics for collimating light provided by the laser source, focusing optics for focusing the collimated light provided by the collimating optics, and a detector array disposed at the focal plane of the focusing optics. Two surface acoustic wave transducers are disposed adjacent to one another and adjacent to an optical path between the collimating and focusing optics. The surface acoustic wave transducers are individually connected to antennas which are oriented substantially parallel to one another. The surface acoustic wave transducers launch surface acoustic waves which interact with the laser light and cause the light to be deflected in proportion to the amplitude and frequency of signals applied to the surface acoustic wave transducers by the antennas. The beams deflected by the two surface acoustic waves result in an interference pattern created at the detector array. A microcomputer is provided and coupled to the detector array for comparing the amplitude of the main sidelobes of the interference pattern which is indicative of the direction of arrival of energy received by the two antennas.
摘要翻译： 提供了包括激光源，用于准直由激光源提供的光的准直光学器件，用于聚焦由准直光学器件提供的准直光的聚焦光学器件和设置在聚焦光学器件的焦平面处的检测器阵列的装置。 两个表面声波换能器彼此相邻设置并且邻近准直和聚焦光学器件之间的光路。 表面声波换能器分别连接到彼此基本平行取向的天线。 表面声波传感器发射与激光相互作用的表面声波，并且使得光被与天线施加到表面声波换能器的信号的幅度和频率成比例地偏转。 由两个表面声波偏转的光束导致在检测器阵列处产生的干涉图案。 提供微型计算机并耦合到检测器阵列，用于比较表示由两个天线接收的能量的到达方向的干扰图案的主旁瓣的幅度。
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公开(公告)号：US4197093A
公开(公告)日：1980-04-08
申请号：US733675
申请日：1976-10-18
申请人： Richard L. Abrams
发明人： Richard L. Abrams
CPC分类号： B01D59/34
摘要： A beam of ammonia molecules including the isotopes N.sup.15 H.sub.3 and N.sup.14 H.sub.3 is generated wherein some of the molecules of each isotope reside in an asymmetric energy state and other of the molecules of each isotope reside in a symmetric energy state. The symmetric state molecules are removed from the beam in a first state selector to provide a beam containing substantially only asymmetric state molecules of each isotope. The latter beam is fed to a resonant microwave cavity where it interacts with microwaves of a frequency inducing asymmetric state to symmetric state transitions for molecules of one of the isotopes but not for molecules of the other isotope. Either the asymmetric state molecules or the symmetric state molecules are removed from the resultant beam in a second state selector to provide a beam containing substantially only molecules of the other energy state enriched in the isotope N.sup.15 H.sub.3.
摘要翻译： 产生包括同位素N15H3和N14H3的氨分子束，其中每个同位素的一些分子位于不对称能态，并且每个同位素的其它分子驻留在对称能态中。 在第一状态选择器中从束中去除对称状态分子，以提供包含基本上仅每个同位素的不对称状态分子的束。 后者的光束被馈送到谐振微波腔，在谐振微波腔中，与与其中一个同位素的分子的不对称状态的频率相对应的微波与对称状态跃迁相互作用，而不与另一个同位素的分子相互作用。 在第二状态选择器中从所得到的光束中去除不对称状态分子或对称状态分子，以提供基本上仅含有富含同位素N15H3的其他能态的分子的光束。
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公开(公告)号：US4197008A
公开(公告)日：1980-04-08
申请号：US864356
申请日：1977-12-27
CPC分类号： G02F1/0322 , G02F1/23 , G02F3/022
摘要： Electronically tunable optical filters are disclosed wherein a spatially varying dc electric field is applied to successive regions of a birefringent crystalline medium disposed between a pair of suitably oriented polarizers along the path of a light beam to be filtered. The dc electric field, which may be either parallel or perpendicular to the light path, electro-optically produces in the birefringent medium an effective oscillation of the optic axis of the medium about the pass direction of the input polarizer in a plane perpendicular to the light path as a function of distance along the light path with a predetermined spatial variation to achieve a desired filter transmission characteristic. The electric field is generated from programmable control voltages to provide a wide variety of filter passband or stopband characteristics.
摘要翻译： 公开了电子可调谐滤光器，其中空间变化的直流电场被施加到沿着待滤光束的路径设置在一对适当取向的偏振器之间的双折射晶体介质的连续区域。 可以平行或垂直于光路的直流电场在双折射介质中在垂直于光的平面中在输入偏振器的传播方向上围绕介质的光轴的有效振荡产生电光 路径作为具有预定空间变化的沿着光路的距离的函数，以实现期望的滤波器传输特性。 电场由可编程控制电压产生，以提供各种滤波器通带或阻带特性。
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公开(公告)号：US4119930A
公开(公告)日：1978-10-10
申请号：US726337
申请日：1976-09-24
摘要： A wideband optical ring modulator is disclosed. A ring resonator containing a synchronous travelling wave electro-optic modulator is disposed external to a laser cavity. The invention provides a compact lightweight optical modulator which combines the power enhancement capabilities of a resonant cavity with the wideband capabilities of a travelling wave coupling modulator. The present invention is especially useful for, although not limited to, ultra-wideband infrared laser communication systems utilizing PCM techniques.
摘要翻译： 公开了一种宽带光环调制器。 包含同步行波电光调制器的环形谐振器设置在激光腔的外部。 本发明提供了一种紧凑的轻型光调制器，其将谐振腔的功率增强能力与行波耦合调制器的宽带能力相结合。 本发明对于但不限于使用PCM技术的超宽带红外激光通信系统特别有用。
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公开(公告)号：US3979686A
公开(公告)日：1976-09-07
申请号：US611059
申请日：1975-09-08
IPC分类号： G02F1/17 , G02F2/00 , H04B10/158
摘要： A laser beam frequency modulation demodulator is disclosed utilizing the highly linear frequency versus voltage characteristic of the absorption resonance provided by a Stark-effect cell. An error signal, generated by dither modulation of the Stark-effect cell voltage, is fed back to the Stark-effect cell via a low-pass filter to cause the absorption resonance to track the instantaneous frequency of the laser beam. The feedback signal applied to the Stark-effect cell has an amplitude proportional to the frequency modulation on the laser beam.
摘要翻译： 公开了利用由斯塔克效应单元提供的吸收共振的高线性频率对电压特性的激光束频率调制解调器。 通过Stark效应单元电压的抖动调制产生的误差信号通过低通滤波器反馈到斯塔克效应单元，以使吸收共振跟踪激光束的瞬时频率。 施加到斯塔克效应单元的反馈信号具有与激光束上的频率调制成比例的幅度。
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