公开(公告)号：WO1988009539A2

公开(公告)日：1988-12-01

申请号：PCT/US1988001655

申请日：1988-05-17

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  LEDDEN, Larry, D.

IPC: G06F15/66

CPC classification number: G09G5/14 ,  G06F3/1431 ,  G06T15/005 ,  G09G1/167 ,  G09G3/006 ,  G09G5/024 ,  G09G5/06 ,  G09G5/24 ,  G09G5/363 ,  G09G5/39 ,  G09G2310/0224

Abstract: A raster image graphics subsystem (10) for an acoustic console, or other console requiring sensor and/or graphics imagery, employs extensive parallelism and modularity to enhance performance and flexibility. Parallel specialized image cogenerators (14) respond to commands from graphics and acoustic processors to draw representations of image in bit map memories (16) via an image bus (26). A display controller (20) accesses these representations via a video bus (12) which provides for various mappings of bit map memories to the display controller. Multiple images can be displayed on a single monitor (22) using viewporting techniques managed by a viewport controller (24). New functions and increased throughput can be added to the subsystem by adding additional cogenerators.

Abstract translation: 用于声学控制台或需要传感器和/或图形图像的其他控制台的光栅图像图形子系统（10）采用广泛的并行性和模块化以增强性能和灵活性。 平行专用图像联合发生器（14）响应来自图形和声音处理器的命令，经由图像总线（26）在位图存储器（16）中绘制图像的表示。 显示控制器（20）经由视频总线（12）访问这些表示，视频总线（12）向显示控制器提供位图存储器的各种映射。 可以使用由视口控制器（24）管理的视口技术，在单个监视器（22）上显示多个图像。 可以通过添加额外的热电联产器将新功能和增加的吞吐量添加到子系统。

公开(公告)号：WO1988008846A1

公开(公告)日：1988-11-17

申请号：PCT/US1988000846

申请日：1988-03-18

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  LAU, Kreisler, S., Y. ,  OLDHAM, Susan, L. ,  ELIAS, William, E. ,  BIGUS, Stephen, J.

IPC: C07F07/08

CPC classification number: C08F30/08 ,  C07F7/081 ,  C07F7/0812 ,  C08G59/306

Abstract: A new group of silane compounds in which silicon atoms are linked together by a hydrocarbon chain and which comprise phenyl groups substituted with an epoxy group or an ethenyl group. The compounds of the present invention have the formula where R1 is selected from the group consisting of: (a) an aliphatic hydrocarbon group containing 2 to 10 carbon atoms, and (b) a group having the formula where n=1 to 3 m=0 to 5; R2 and R2' are each selected from the group consisting of an alkyl group containing 1 to 4 carbon atoms, an unsubstituted aryl group, and a substituted aryl group; and R3 is selected from the group consisting of: where R4, R5, and R6 are each selected from the group consisting of H, an alkyl group containing 1 to 4 carbon atoms, and an aryl group; and n=0 to 10.

公开(公告)号：WO1988008621A1

公开(公告)日：1988-11-03

申请号：PCT/US1988001242

申请日：1988-04-15

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  DUFORT, Edward, C.

IPC: H01Q03/36

CPC classification number: H01Q3/36

Abstract: An electrically scanned phased array with low sidelobes and tapered aperture illumination is disclosed. The array is fed by a uniform corporate feed network (55) and includes a main array aperture formed by main radiating elements (72-75) and first and second ancillary arrays formed by ancillary radiating elements (70-71 and 76-77). For a linear aperture, the outputs from the feed network (55) are phase shifted to steer the beam to one of the available beam locations, and coupled to corresponding ones of the main array radiating elements (72-75) and the ancillary array radiating elements (70-71 or 76-77). The beam steering phase shifts invoke uniform phase gradients between the elements of the respective array, and bi-state phase correctors (85-88) are provided to correct for phase gradient discontinuities across the main and ancillary array apertures. The coupling values between the respective elements of the main array radiating elements (72-75) and the corresponding ancillary array radiating elements (70-71 and 76-77) are selected to provide a desired aperture illumination, such as a tapered aperture illumination. The array may be constructed with identical modules, resulting in improved performance at lower cost.

公开(公告)号：WO1988008227A1

公开(公告)日：1988-10-20

申请号：PCT/US1988000878

申请日：1988-03-14

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  WILLIAMS, John, M., III ,  WARTHER, Donald, Paul ,  LAWSON, Robert, C.

IPC: H03G03/20

CPC classification number: H03G3/301 ,  Y10T428/24017

Abstract: The output of a noise canceling first or second order electret gradient microphone in a very high noise environment has background noise attenuated and certain phonemes shaped to improve intelligibility by means of a slow action automatic gain control circuit (22) which matches dynamic range of the microphone (10) with dynamic range of the following communication channel, and a fast action automatic gain control circuit (24) in parallel with the first circuit, that reshapes puff noise into plosive, fricative and affricative speech component signals that produced the puff noise.

公开(公告)号：WO1988007786A2

公开(公告)日：1988-10-06

申请号：PCT/US1988000478

申请日：1988-02-19

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  THOMPSON, James, D.

IPC: H03F03/60

CPC classification number: H01Q21/22 ,  H01Q3/22 ,  H03F3/602 ,  H03F2200/198 ,  Y10S343/02

Abstract: An equal power amplifier system (100) for amplifying a plurality of signals for transmission by an active phase array antenna (20), and a compact plural level beam-forming network (98) for forming a plurality of such signals, for example on excitation patterns for frequency scanned virtual beams, are disclosed. The amplifier system uses at most only a few sizes of power amplifiers (130, 134) to amplify efficiently numerous signals having significantly different amplitudes. This is accomplished by distributing the task of amplifying signal pairs (Ai, Bi) composed of one large amplitude signal and one small amplitude signal to an equal power amplifying apparatus (130; 230), which includes two hybrid couplers (236, 238) and two equally sized power amplifiers (232, 234). The first hybrid coupler (236) divides the two signals (Ai, Bi) for input into the two power amplifiers. The second hybrid coupler (238) receives the intermediate amplified signals from the power amplifiers and through constructive and destructive interference produces amplified output signals (Ai*, Bi*) corresponding to the input signals. Also disclosed is a method for properly selecting pairs of signals from an amplitude distribution (200; 202) for application to such equal power amplifying apparatuses of the amplifier system in order to operate the power amplifiers therein at or near peak efficiency. The beam-forming network (98) is arranged on two levels to simplify interconnection of the selected pairs of outputs of its line summers (176) for input into the equal power amplifier system. The amplifier system and beam-forming network may be used together, for example, in the transmit antenna system of a geosynchronous satellite (10) or mobile earth station.

公开(公告)号：WO1988007770A1

公开(公告)日：1988-10-06

申请号：PCT/US1988000532

申请日：1988-02-26

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  THOMPSON, James, D.

IPC: H01Q25/00

CPC classification number: H01Q21/22 ,  H01Q25/00 ,  H03F3/602 ,  H03F2200/198

Abstract: A beam-forming network (98) employs one or a plurality of first transmission delay lines (168, 170, 172, 174) for receiving transmit signals (T1-T4) applied thereto, and a plurality of second transmission lines (176), which serve as line summers. Each of the first transmission delay lines has first and second portions (168a, 168b; 170a, 170b; 172a, 172b; 174a, 174b) spaced apart from one another so as to define first and second levels displaced from one another. The set of second transmission lines (176) are arranged in first and second subsets (176a, 176b) which are respectively disposed adjacent to the first and second levels and respectively associated with the first and second portions of the first lines, such that the first subset of second lines is coupled to the first portion of the first lines, and the second subset of the second lines is coupled to the second portion of the first lines. Further, selected ones of the first subset of second lines are disposed adjacent to selected ones of the second subset of second lines in order to facilitate simple and ordely routing of transmission lines (126, 128, 130) between the beam-forming network and a novel equal power amplifier system (100) described herein.

公开(公告)号：WO1988007688A1

公开(公告)日：1988-10-06

申请号：PCT/US1988000524

申请日：1988-02-25

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  WAKUGAWA, Jason, M. ,  GRESKO, Lawrence, S. ,  BROWN, Kenneth, M.

IPC: G02B05/08

CPC classification number: C04B41/009 ,  C04B41/5059 ,  C04B41/87 ,  G02B5/08 ,  Y10T428/249957 ,  Y10T428/30 ,  C04B41/4529 ,  C04B41/455 ,  C04B41/52 ,  C04B41/53 ,  C04B35/565 ,  C04B38/00

Abstract: A lightweight mirror comprises a silicon carbide (SiC) foam core having a bulk density of approximately five percent. The mirror further comprises two solid facesheets each of which is integrally formed upon a surface of the SiC foam core, the facesheets being comprised of SiC. Upon a machined surface of one or both of the facesheets a further layer of SiC is deposited to reinforce the SiC facesheet and to provide an optically polishable surface. This outer layer of SiC may be deposited by chemical vapor deposition (CVD) techniques. After depositing this reinforcing layer of SiC, the layer is machined and polished to provide a mirror surface having a desired flatness and optical quality.

公开(公告)号：WO1988007210A1

公开(公告)日：1988-09-22

申请号：PCT/US1988000187

申请日：1988-01-25

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  STEEL, Duncan, G. ,  TURLEY, R., Steven

IPC: G01T01/29

CPC classification number: G01N21/6402 ,  G01J3/4338 ,  G01T1/2907

Abstract: Related systems and methods are described for determining the angular direction of an atomic beam (2) relative to the beam's reference axis (4). For a non-relativistic atomic beam, a pair of counterpropagating (6 and 8), equal frequency laser beams intersect the atomic beam at a known angle to the reference axis (4), preferably perpendicular. The atomic beam direction is inferred from the frequency difference between resonant peaks in the laser beam fluorescence as the laser frequency is scanned. For a relativistic atomic beam, a pair of laser beams (46 and 48) intersect the atomic beam from different sides at equal predetermined angles. The atomic beam direction is determined by observing the difference between resonant absorption peaks in the transmitted laser (38) beam intensities as either the laser beam (38) frequencies or laser beam angles between the laser (38) and atomic beams are preferably selected to minimize the widths of the resonant peaks. For both the relativistic and non-relativistic cases, an FM derivative spectroscopy technique is used by which the derivatives of the laser beam intensity signals are obtained, and zero crossings of the derivative signal used to precisely locate the resonant intensity peaks.

公开(公告)号：WO1988006322A2

公开(公告)日：1988-08-25

申请号：PCT/US1987003301

申请日：1987-12-14

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  SHU, David, B.

IPC: G06F15/66

CPC classification number: G06F15/8023 ,  G06K9/4638 ,  G06T1/20

Abstract: Processing elements (PE1, PE2, etc.) in an image understanding machine are provided with gated connections (GN1, GS1, etc.) between each processing element and its neighbors. The image is loaded into the machine so that each pixel is stored in the memory (302) of each processing element. Unique labels are applied to each processing element in each segmented region (R1, R2) by using a series of some/none tests taking advantage of the gated connections between the processing elements of each region. In such manner, higher level processing of the image can be performed.

Abstract translation: 在图像理解机器中的处理元件（PE1，PE2等）在每个处理元件与其邻居之间提供门控连接（GN1，GS1等）。 图像被加载到机器中，使得每个像素被存储在每个处理元件的存储器（302）中。 通过使用一系列某些/无测试利用每个区域的处理元件之间的门控连接，将唯一标签应用于每个分段区域（R1，R2）中的每个处理元件。 以这种方式，可以执行图像的较高级处理。

公开(公告)号：WO1988006302A1

公开(公告)日：1988-08-25

申请号：PCT/US1987003295

申请日：1987-12-14

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  PEPPER, David, M. ,  O'MEARA, Thomas

IPC: G02F01/03

CPC classification number: G01J9/02 ,  G02F1/1313 ,  G02F1/134309

Abstract: An electro-optical device (10) is used to alter characteristics of a light beam passing through it. In a particularly preferred embodiment, the device (10) is used as a phase stop having a dynamically variable aperture whose size is defined by the selected application of an electrical potential across one or more concentric, transparent ring-like electrodes (13, 14, 16 and 18). The electro-optical device (10) finds particular utility in a common-path interferometer (40) where fringe visibility is optimized by using suitable servo-electronics (56) to select an appropriate aperture size for the phase stop (10).

Abstract translation: 电光装置（10）用于改变通过它的光束的特性。 在特别优选的实施例中，装置（10）用作具有动态可变孔径的相位停止器，其尺寸由所选择的跨越一个或多个同心的透明环形电极（13,14， 16和18）。 电光装置（10）在公共路径干涉仪（40）中具有特别的用途，其中通过使用合适的伺服电子设备（56）来选择相位停止（10）的适当孔径尺寸来优化边缘可见度。