公开(公告)号：WO1987004305A1

公开(公告)日：1987-07-16

申请号：PCT/US1986002687

申请日：1986-12-15

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  McCLANAHAN, Robert, F. ,  WASHBURN, Robert ,  HWANG, William, B.

IPC: H03G03/20

CPC classification number: H03G3/22 ,  G01S7/282

Abstract: A control signal (output 47) is achieved by measurement of the TWT (11) dynamic gain detecting (42, 43) the input and output signal to/from the TWT. A positive feedback loop couples a portion of the TWT (11) output power to the TWT input using a power combiner (19). The power output portion feedback is controlled by the control signal in order to keep the TWT operating in a desired condition to accommodate variations in gain, e.g.: saturation during TWT input pulse rise and pulse full times. The TWT is maintained in the desired condition despite changes in the condition of the TWT or in the signals applied to the TWT.

Abstract translation: 控制信号（输出47）通过TWT（11）动态增益检测（42,43）到TWT的输入和输出信号的测量来实现。 正反馈回路使用功率组合器（19）将TWT（11）输出功率的一部分耦合到TWT输入。 功率输出部分反馈由控制信号控制，以便使TWT工作在期望的条件下以适应增益的变化，例如：在TWT输入脉冲上升和脉冲充满时间期间的饱和度。 尽管TWT的条件或施加于TWT的信号发生变化，TWT保持在所需状态。

公开(公告)号：WO1987003970A1

公开(公告)日：1987-07-02

申请号：PCT/US1986002603

申请日：1986-12-04

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  DEZSO, Joseph, A.

IPC: G02B07/02

CPC classification number: G02B7/026

Abstract: A spacer adapted for use in an optical system holds lenses in place within a housing. The spacer (20) has a plurality of wire column elements (22) which extend under critical column load between the edges of spaced-apart lens elements (30, 31). The wires are preformed with a bend which directs any lateral deflection parallel to a surface of the housing and out of the light ray space of the lenses. The ends of the wires are received in holes formed in a pair of spaced-apart, arcuate end members (24) which extend circumferentially along peripheral surfaces of the lenses. The outer surfaces of the end members are shaped to mate with corresponding abutting surfaces of the lenses.

公开(公告)号：WO1987003746A1

公开(公告)日：1987-06-18

申请号：PCT/US1986002590

申请日：1986-12-02

Applicant: HUGHES AIRCRAFT COMPANY

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

IPC: H01Q03/26

CPC classification number: H01Q21/0031 ,  H01Q3/2658

Abstract: An optical limited scan antenna system. The invention is a dual lens (70, 80) type array antenna system with a small array feed network (65). The system includes a bootlace-type microwave aperture lens (80) with an array of radiating elements (85) arranged along the linear aperture (82) and an array of pickup elements (75) arranged along the curved inner surface (81), an intermediate optical corrective lens (70), a feed array (65) for illuminating the corrective lens with a source distribution, and with a power divider (55) and phase shifters (60) arranged to drive the feed array. The corrective lens (70) is circularly symmetric (spherically symmetric in the three-dimensional case), and its radially varying dielectric constant is such that a point source on its surface is focused to an image point on the inner surface (81). The pickup elements (75) on the curved surface (81) of the aperture lens are coupled to corresponding radiating elements (85) on the linear aperture (82). The corrective (70) and aperture lenses (80) cooperate to map an input or source distribution into an aperture distribution which is a scaled version of the source distribution. The system results in high efficiency obtained with a minimum number of active elements and relatively low cost optical components.

公开(公告)号：WO1987003683A1

公开(公告)日：1987-06-18

申请号：PCT/US1986002017

申请日：1986-09-25

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  ELLERBROEK, Brent, L. ,  COHN, Brian, D.

IPC: G01J09/00

CPC classification number: G01J9/00

Abstract: A shearing phase difference sensor including a high energy laser source for generating adjacent coherent light beams. Samples of the beams are extracted by an extracter and directed to an optical modifier. The optical modifier, positioned for intercepting the sample beams from the extracter, diffracts the beams and produces output beams which, in turn, are directed through a lens to a detector. The detector, positioned to intercept the output beams, produces electrical signals indicative of the output beams. The electrical signals are processed by a processor which calculates the phase difference between adjacent coherent light beams. Also, disclosed is a method for measuring the phase difference between adjacent coherent light beams.

公开(公告)号：WO1987003681A1

公开(公告)日：1987-06-18

申请号：PCT/US1986002014

申请日：1986-09-25

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  KLEIN, James, E.

IPC: G01J05/08

CPC classification number: G01J5/041 ,  G01J5/048 ,  G01J5/08 ,  G01J5/0875 ,  G02B3/04 ,  G02B13/14

Abstract: An optical sensing system which generally comprises an infrared sensor (12), and a curved diffraction-limited window (14) disposed in front of the sensor such that the optical axis (16) of the sensor is parallel to and displaced from the symmetry axis of the window. The window has an inner radius of curvature which is non-concentric with the outer radius of curvature in order to remove the optical power of the window. Additionally, the window is provided with an aspheric profile outer surface (20), in order to correct for spherical aberrations in the window. The window is made out of germanium and is particularly useful for a sensor which has an 8-12 micron infrared radiation detection band width.

Abstract translation: 一种光学感测系统，其通常包括红外传感器（12）和设置在传感器前面的弯曲衍射限制窗（14），使得传感器的光轴（16）平行于对称轴 的窗口。 窗口具有与外部曲率半径不同心的内部曲率半径，以便去除窗口的光学功率。 另外，窗口设置有非球面轮廓外表面（20），以便校正窗口中的球面像差。 窗户由锗制成，对于具有8-12微米红外辐射检测带宽的传感器特别有用。

公开(公告)号：WO1987003311A1

公开(公告)日：1987-06-04

申请号：PCT/US1986001898

申请日：1986-09-15

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  KRAMER, Nathan, R.

IPC: D04H13/00

CPC classification number: D04H13/00 ,  B29B15/125 ,  B29K2105/0073 ,  B29K2105/0854 ,  B29K2301/12 ,  B29K2995/0041 ,  D01D5/40 ,  Y10S264/47

Abstract: An in situ fiberization apparatus for continuously fiberizing belt shaped substrates by impregnation with fibrous material formed from fiber forming polymer solutions. The apparatus (10) includes a belt substrate (36) which is continually passed through a fiber forming solution (22) at a constant rate. During passage of the substrate belt (36) through the fiber forming solution (22), the apparatus provides continual oscillation of the belt (36). The oscillating or reciprocating motion of the belt substrate produces the conditions for flow-induced crystallization of fibers around and throughout the substrate material to thereby produce a fiber reinforced substrate.

公开(公告)号：WO1987003289A1

公开(公告)日：1987-06-04

申请号：PCT/US1986001901

申请日：1986-09-15

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  LANDIS, Abraham, L. ,  NASELOW, Arthur, B.

IPC: C08G73/10

CPC classification number: C08G73/1039 ,  C08G73/1032

Abstract: A solvent polycondensation process of preparing polyimides of high molecular weight from dianhydrides and relatively unreactive diamines, where the reaction is carried out in a cresol as a solvent.

公开(公告)号：WO1987002826A1

公开(公告)日：1987-05-07

申请号：PCT/US1986002023

申请日：1986-09-26

Applicant: HUGHES AIRCRAFT COMPANY

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

IPC: H01L27/14

CPC classification number: H01L27/14881 ,  H01L29/76808

Abstract: An interface structure (14) for a hybrid infrared charge coupled device (10) or other signal processing system provides for partial direct injection of the output current of an incorporated detector (12) or other signal source into the incorporated CCD (11). The remaining output current is bypassed through a load resistor (RL) to a load voltage source (VL). An injection path resistor (RI) can be included to provide a voltage near the input threshold bias of the CCD so that it operates in its linear region even at low detector outputs. The disclosed resistors can be conveniently fabricated using an additional polysilicon layer on either the detector or the CCD. The disclosed interface structure makes effective use of the limited charge-handling capability of the CCD. It also makes possible the operation of the detector in an inverted mode to avoid saturation by bright scene objects. In addition, the higher available detector bias reduces crosstalk between detector elements.

公开(公告)号：WO1987002544A1

公开(公告)日：1987-04-23

申请号：PCT/US1986001936

申请日：1986-09-17

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  RICE, Allyn, B. ,  JOHNSON, Ronald, L. ,  PETERMAN, Milton, J.

IPC: H05K09/00

CPC classification number: H05K9/0067

Abstract: A protective container (10) which includes an integral pocket (16) for holding identification material relating to the contents of the container. The pocket and an associated tab (18) over the pocket opening position the identification material such that bar code graphs or magnetic media mounted thereon can be easily read and accessed without requiring that the container be opened or removed from a stack of containers. In the disclosed embodiment, static protective foam liners (24, 26) are used to support the contents (22) as well as provide an electrical path for any charge accumulated on the contents. The container (10) is formed of an optically transparent material which is also static protective in nature. A viewing means is provided in the container and internal support means so that the presence or absence of any contents can be rapidly determined without opening the container.

公开(公告)号：WO1987002204A1

公开(公告)日：1987-04-09

申请号：PCT/US1986002047

申请日：1986-09-26

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  LARSON, Lawrence, E.

IPC: H03M01/72

CPC classification number: H03M1/72

Abstract: A high resolution pipelined digital-to-analog converter having at least one switching circuit for conveying charge to at least one conversion capacitor upon receipt of a digital signal during the first half of a clock cycle. Additional switching circuits are provided for transferring the charge from the conversion capacitors to a feedback capacitor during the second half of the clock cycle. Also provided is a circuit for discharging an analog output from, and preventing the charging of, the feedback capacitor during the first half of a succeeding clock cycle. In a preferred embodiment, the pipelined digital-to-analog converter comprises a first plurality of electrical circuits having at least one feedback capacitor and a plurality of conversion capacitors adapted for accepting digital and analog inputs, wherein the ratio of the feedback capacitance to each of the conversion capacitances is substantially independent of the resolution of the converter. A second plurality of electrical circuits is also provided which is operable to delay at least one bit of the digital signal to one of the first plurality of electrical circuits. The digital-to-analog converter is operable to allow the number of n-bit digital words converted by the converter to be independent of the resolution of the converter.