公开(公告)号：WO1989002611A1

公开(公告)日：1989-03-23

申请号：PCT/US1988003055

申请日：1988-09-06

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  HEGG, Ronald, G. ,  SMITH, Ronald, T. ,  CHERN, Mao-Jin ,  FERRER, John, J.

IPC: G02B27/00

CPC classification number: G02B27/0101 ,  B60K2350/1064 ,  B60K2350/2052 ,  G02B2027/0118 ,  G02B2027/0165

Abstract: A compact, inexpensive and mass-producible optical display system for an automobile creates a highly visible and sharp, high contrast and pleasing, multi-color magnified virtual image of a primary instrument cluster at a viewing distance which is greater than the actual optical distance between the dashboard and the driver's eyes in order to enhance instrument readability, minimize driver eye strain, and reduce eye focus problems which are associated with transitioning between the far range viewing used for watching the road ahead and the near range viewing used for glancing at the instruments. A non-pupil forming display system uses a single off-axis asphericle mirror with power to create a virtual image of a miniaturized, multi-color passive image source, such as a segmented LCD panel, which is backlighted by a small filament incandescent light bulb. The aspheric surface is optimized to minimize aberrations and reduce vertical disparity and field curvature. The image source is pre-distorted to compensate for distortion in the off-axis configuration. A holographic diffusing screen element laminated onto the image source provides uniform high brightness and uniform contrast over the entire field-of-view which is visible from an eyellipse sufficient to accommodate most of the driver population, minimizes the visual impact of any optical aberrations near the edge of the viewing area, and provides the non-pupil forming system with some of the desirable optical properties of a pupil forming system. The incandescent bulb is positioned at a remote location selected to minimize heat in the region of the image source and to facilitate replacement of the bulb in case of failure. The light emitted by the bulb is collected and focused into the aperture of a fiber optic bundle which splits into a number of ends behind the LCD panel. Ambient reflections are reduced and controlled by a curved and tilted glare shield and a black surface light trap.

公开(公告)号：WO1989002120A1

公开(公告)日：1989-03-09

申请号：PCT/US1988002850

申请日：1988-08-18

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  KELLEY, Edwin, A. ,  BALLER, Howard, H. ,  CONILOGUE, Randall, L.

IPC: G06F07/50

CPC classification number: G06F7/509

Abstract: A digital computing system comprises first, second, third, fourth, fifth, and sixth multi-bit binary signal sources and first and second binary adders. Each binary adder has a plurality of parallel stages equal in number to the bits of the signals. Each stage of each adder has a first full adder and a second full adder. Each full adder has an addend input, an augend input, a carry input, a sum output, and a carry output. In the first adder, the first source is connected to the addend input of the first full adder, the second source is connected to the augend input of the first full adder, the third source is connected to the carry input of the first full adder, the sum output of the first full adder is connected to the addend input of the second full adder, the carry output of the first full adder is connected to the carry input of the next higher order stage of the second full adder, and the fourth source is connected to the augend input of the second full adder. The full adders are implemented with low-level, non-saturating, bipolar differential logic circuitry, which greatly reduces the power dissipation at high data processing speeds. The circuitry is physically laid out on an integrated circuit chip so the stages within an adder are contiguous to each other in bit order and/or the corresponding stages of different adders are aligned with each other.

公开(公告)号：WO1989001914A1

公开(公告)日：1989-03-09

申请号：PCT/US1988002371

申请日：1988-07-18

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  KYLE, Nanse, R.

IPC: C01G33/00

CPC classification number: C30B29/22 ,  C01G33/00 ,  C01G35/00 ,  C01G35/006 ,  C01P2002/54 ,  C01P2006/80 ,  C30B15/00

Abstract: (Nb1-xTax)2O5 powder (12) is contacted to steam for an extended time at elevated temperature to remove impurities in the powder that remain after the purification processes of manufacturing. Heated water is transported in a carrier gas to the heated powder (12), where the impurities are reacted with the protons in the steam and converted to a volatile form that is removed with the carrier gas. Preferably, the steam is carried in nitrogen gas to powder (12) preheated to about 1000 DEG C. High purity KNb1-xTaxO3 crystals are prepared from the purified (Nb1-xTax)2O5 powder (12).

Abstract translation: （Nb1-xTax）2O5粉末（12）在升高的温度下与蒸汽接触延长的时间以除去在制造纯化过程后残留的粉末中的杂质。 加热水以载气输送到加热的粉末（12）中，其中杂质与蒸汽中的质子反应并转化成与载气一起除去的挥发性形式。 优选地，将蒸汽在氮气中运送至预热至约1000℃的粉末（12）。由纯化的（Nb1-xTax）2O5粉末（12）制备高纯度KNb1-xTaxO3晶体。

公开(公告)号：WO1989001710A1

公开(公告)日：1989-02-23

申请号：PCT/US1988002189

申请日：1988-07-01

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  WILEY, Carl, A. (deceased)

IPC: H01Q03/42

CPC classification number: H01Q21/296 ,  G01K11/006

Abstract: A microwave radiometer is formed of a set of frequency scanning antennas (26) disposed parallel to each other and connected by a common microwave feeder (28). Signals of individual ones of the antennas are translated (36) to different intermediate frequencies such that differences between the intermediate frequencies are proportional to baseline spacings between pairs of antennas of nested interferometers. A correlator containing parallel delay lines and a set of multiplier channels coupled to paired taps of the delay lines receives signals at the intermediate frequencies to produce a set of correlation signals. A two-dimensional Fourier transformation is applied to the correlation output signals to provide the power spectral density of microwave radiation incident upon the array of antennas.

公开(公告)号：WO1989001437A1

公开(公告)日：1989-02-23

申请号：PCT/US1988002365

申请日：1988-07-01

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  ROCHEFORT, Mark, G.

IPC: B64G01/10

CPC classification number: B64G1/10 ,  B64G1/002 ,  B64G1/1085 ,  B64G1/222 ,  B64G1/44 ,  B64G1/641 ,  B64G1/66

Abstract: A spacecraft (100) such as a satellite, is shaped roughly in the form of a cup with a hollow inner cavity (106) such that a plurality of such spacecraft may be stowed for launch in a nested stack (204), thereby enabling a greater number of satellites to be launched simultaneously with a single launch vehicle (201). The cup-shaped configuration results from the satellite having a base member (105) with panels or side walls (101a, 101b, 101c) extending from portions of the perimeter of the base member at a non-zero angle thereto.

公开(公告)号：WO1988010459A1

公开(公告)日：1988-12-29

申请号：PCT/US1988001465

申请日：1988-05-06

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  SMAY, John, W. ,  YOCUM, John, F., Jr. ,  GONZALES, Eugene, Jr.

IPC: G05D01/08

CPC classification number: B64G1/38 ,  G05D1/0883

Abstract: A nutation sensor and nutation control system using a relative spin phase sensor (28) in a dual-spin stabilized satellite (20) is disclosed. The relative spin phase sensor (28) provides index pulses indicative of the relative spin phase and rate between the satellite rotor (24) and platform (22). Nutation of the satellite perturbs the relative spin position of the rotor (24) and platform (22) and means (44, 46) are provided for analyzing index pulse arrive times to calculate nutation of the satellite. In the nutation control system, means (32) are provided to apply a nutation damping torque to the satellite.

公开(公告)号：WO1988010025A1

公开(公告)日：1988-12-15

申请号：PCT/US1988001463

申请日：1988-05-06

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  HUDSPETH, Thomas ,  KAPLAN, David, S. ,  ROSEN, Harold, A.

IPC: H03F01/02

CPC classification number: H03F1/0244 ,  H03F3/2178

Abstract: A high efficiency envelope amplifier (20) is disclosed. The invention includes a power supply (24), a comparator (60), and several switches (26-38). The power supply (24) is capable of providing multiple outputs. The comparator (60) measures the amplitude of an input signal against one of several threshold levels. When the input signal is within a predetermined range, a selected power supply output is switched onto the output path. Since the present invention incrementally switches small amounts of power, switching losses are substantially mitigated.

公开(公告)号：WO1988009548A1

公开(公告)日：1988-12-01

申请号：PCT/US1988001671

申请日：1988-05-18

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  REED, Frank, A.

IPC: G10K11/34

CPC classification number: G10K11/346

Abstract: Quantized delay values used in a digital beamformer are selected so as to minimize the derivative of the beamformer pattern. A first set of quantization error values, one for each hydrophone, is determined from the precise delay values and a second set determined by adding a shading factor times the sample period to each member of the first set. Each set of combinations of the first and second sets of error values is then examined to determine which set minimizes the derivative of the beamformer pattern. The quantized delay values are then determined by selecting the quantized delay value corresponding to the error value in the set which minimizes the derivative.

Abstract translation: 选择在数字波束形成器中使用的量化延迟值，以使波束形成器模式的导数最小化。 从精确的延迟值确定第一组量化误差值，每个水听器一个量化误差值，并且通过将采样周期乘以第一组的每个成员的采样周期确定的第二组。 然后检查第一组和第二组误差值的每组组合，以确定哪个集合最小化波束形成器模式的导数。 然后通过选择对应于最小化导数的集合中的误差值的量化延迟值来确定量化延迟值。

公开(公告)号：WO1988009518A1

公开(公告)日：1988-12-01

申请号：PCT/US1988001237

申请日：1988-04-15

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  BUCKLEY, Robert, H. ,  GUNDERSEN, James, L.

IPC: G02B06/24

CPC classification number: H04B10/2581 ,  G02B6/24 ,  G02B6/2817 ,  G02B6/425

Abstract: An apparatus for launching separate mode groups comprising an LED (13) and a collimator (C1) for providing a first beam (19) of collimated light and an LED (15) and a collimator (C2) for providing a second beam (23) of collimated light. The beams (19) and (23) intersect and form an acute angle A. A light guide (R1) has a receiving face (27) at the intersection of the beams (19) and (23) so that the beams are launched into the light guide as first and second mode groups, respectively.

Abstract translation: 一种用于发射分离模式组的装置，包括用于提供准直光的第一光束（19）和用于提供第二光束（23）的LED（15）和准直器（C2））的LED（13）和准直器（C1） 准直光。 光束（19）和（23）相交并形成锐角A.光导（R1）在光束（19）和（23）的交叉处具有接收面（27），使得光束被引入 光导分别为第一和第二模式组。

公开(公告)号：WO1988009102A1

公开(公告)日：1988-11-17

申请号：PCT/US1988001509

申请日：1988-05-05

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  LEDEBUHR, Arno, G.

IPC: H04N09/31

CPC classification number: H04N9/3105 ,  H04N9/3167

Abstract: An optical system (10) for a full color liquid crystal light valve image projector is provided. The invention includes a first prepolarizer (20) for separating from a first beam light of first and second colors and a first polarization state and a second prepolarizer (22) for separating from the first beam light of a third color and a second polarization state. The resultant first beam contains light of a third color and first polarization state and light of first and second colors and second polarization state. A polarization selective beamsplitter (24) is provided in the optical path of the first beam for transmitting, in a second beam, light in the first beam having the first polarization state and reflecting, in a third beam, light in the first beam having the second polarization state. A color selective beamsplitter (32) is included for transmitting, in a fourth beam, light in the third beam having a first color and for reflecting, in a fifth beam, light in the third beam having a second color. In the illustrative embodiments, the invention includes first and second reflective surfaces (26 and 36) for reflecting the second and fifth beam respectively into a parallel coplanar relationship.