Patents Examined by Brian K Andrea
  • Patent number: 6771204
    Abstract: A radio wave absorber unit includes two or more molded bodies in a pyramid or wedge shape whose radius at the tip end is from 0.5 mm to 7.5 mm and a base. A radius at the trough between adjacent molded bodies is 7.5 mm or less. A unit including molded bodies and the base is integrally formed from propylene-based conductive expanded beads. The bases of adjacent units are connected by fitting their recessed and raised portions to each other. The expanded bead size is in the range from 2 mm to 10 mm, and beads with two or more different bead diameters can be used. A hollow molded body can be formed by providing a hollow structure inside.
    Type: Grant
    Filed: January 28, 2003
    Date of Patent: August 3, 2004
    Assignees: Kabushiki Kaisha Riken, JSP Corporation
    Inventors: Toshikatsu Hayashi, Akira Kunimoto
  • Patent number: 6765653
    Abstract: An electronic distance meter includes a sighting telescope having an objective lens for sighting an object; a reflection member provided behind the objective lens, wherein the reflection member is positioned so as to be eccentric with respect to an optical axis of the objective lens; and an optical distance meter which includes a light-transmitting optical system for transmitting a measuring light via the reflection member and the objective lens, and a light-receiving optical system for receiving a portion of the measuring light which is reflected by the object, subsequently passed through the objective lens, and not obstructed by the reflection member.
    Type: Grant
    Filed: May 23, 2001
    Date of Patent: July 20, 2004
    Assignees: PENTAX Corporation, PENTAX Precision Co., Ltd
    Inventors: Masami Shirai, Shinichi Suzuki, Homu Takayama
  • Patent number: 6765654
    Abstract: An object of the invention is to obtain a coherent laser radar device that provides one system of a photo detector and eliminates a blind zone, including a pulsed laser that oscillates at a frequency which is identical with or close to an output light of a local light source as a single frequency; a transmission/reception optical system that irradiates a pulsed laser beam from the pulsed laser toward a target as a transmission light and receives a scattered light from the target as a reception light; a light coupling means that couples the output light from the local light source and the reception light; a photo detecting portion that conducts light coherent detection on a coupled light; and a signal processing device that calculates a speed and a distance of a target in accordance with an output of the detection, in which the photo detecting portion comprises: a photo detecting element that conducts the light coherent detection; a microwave switch that changes over a propagation path of an output from the ph
    Type: Grant
    Filed: November 21, 2002
    Date of Patent: July 20, 2004
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kimio Asaka, Yoshihito Hirano, Takayuki Yanagisawa
  • Patent number: 6738011
    Abstract: A method and system for suppression of ground returns in a vertical profile radar display. The method includes receiving radar returns each comprising a plurality of range bins collated to a vertical profile radar display. The received range bins are analyzed to locate ground returns. A plurality of range bins are selected based upon the located ground returns. The radar returns are modified based upon the selected range bins.
    Type: Grant
    Filed: May 16, 2003
    Date of Patent: May 18, 2004
    Assignee: Honeywell International Inc.
    Inventor: Joseph B. Evans
  • Patent number: 6724340
    Abstract: A system and method for detecting a target object through foliage includes a transmitter for generating a low-frequency electromagnetic signal. The signal is directed toward a potential target object for reflection from the potential target object. The system further includes a plurality of mutually dispersed sensors for receiving the reflected signal from the target object. A mechanism is provided to determine the relative locations of the sensors. Signal information from the received signals is sent to a central processor. The central processor inputs the signal information into a beamformer algorithm such as the Maximum Likelihood Method (MLM) to reduce sidelobe ambiguities and resolve the true location of the target from the signal information.
    Type: Grant
    Filed: February 13, 2003
    Date of Patent: April 20, 2004
    Assignee: Information Systems Laboratories
    Inventors: John Don Carlos, David R. Kirk, Jameson Bergin, Paul M. Techau, J. Doss Halsey
  • Patent number: 6714283
    Abstract: A sensor and method for taking range measurements of a target object using a TDI device as a detector are provided. The device is positioned to detect reflections of a structured light beam on the target object. To avoid losing the range information in the TDI process, the exposition of the device to the reflection of the light beam is restricted to the first integration period of the acquisition cycle of the TDI device, so that the output of the device provides line by line an image of the light beam on the target object during this first integration period.
    Type: Grant
    Filed: April 2, 2002
    Date of Patent: March 30, 2004
    Assignee: Institut National d'Optique
    Inventors: John Laurent, Denis Boulanger
  • Patent number: 6697147
    Abstract: A position measurement apparatus and method using laser includes a laser generating device, an image device, and a control unit. The laser generating device generates three or more laser beams progressing in parallel with each other at regular intervals. The image device obtains a picture for three or more points formed on a target by the laser beams. The control unit calculates a position relative to the target using number of pixels between pairs of neighboring ones of the three or more points in the picture. Thus, the present invention is advantageous in that laser pointers and a CCD camera having simple constructions and low prices are used, so that the position measurement apparatus is handled conveniently and is economical.
    Type: Grant
    Filed: November 7, 2002
    Date of Patent: February 24, 2004
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Won-Jun Ko, Soo-Sang Yang
  • Patent number: 6686872
    Abstract: A system for performing automated in-place measurement of reflectivity of a radome of an airplane. Includes a radar drive circuit that generates radar signals at a predetermined frequency. An antenna receives the generated radar signals from the radar drive circuit, and transmits radar waves at the predetermined frequency. The antenna receives radar return waves from the radome. The antenna is mountable on a scanning apparatus that scans a substantial area of the radome. A signal processor processes the radar return waves from the radome that are received by the antenna. The signal processor determines whether magnitude of the radar return waves from the radome exceeds a predetermined level for a given position on the radome. When the magnitude of the radar return waves exceeds the predetermined level, a degraded condition of the radome is indicated and an alert signal is generated and provided to an operator.
    Type: Grant
    Filed: August 2, 2002
    Date of Patent: February 3, 2004
    Assignee: Honeywell International Inc.
    Inventor: David C. Vacanti
  • Patent number: 6677888
    Abstract: A method and apparatus that permit military aircraft operators to use the civilian Aircraft Addressing and Reporting System (ACARS) technology while ensuring data security.
    Type: Grant
    Filed: August 9, 2002
    Date of Patent: January 13, 2004
    Assignee: Honeywell International, Inc.
    Inventor: Aloke Roy
  • Patent number: 6665057
    Abstract: A method of distance measurement for vehicles by transit time measurement of laser pulses employs a distance sensor including a transmitter (11) having a pulse generator (1A) for the generation of a laser pulse (L), and a receiver (12) having a transit time measurement circuit (3A) for the detection of a reflected laser pulse (RL) reflected by a target. A cover wall (2), which is partially transparent to laser radiation, defines an installation space in which these elements are arranged, with a transit time of a reflected portion (RT) of the laser pulse (L), reflected by the cover wall (2) to the receiver (12), being measured as a reference time signal for the distance measurement.
    Type: Grant
    Filed: March 27, 2002
    Date of Patent: December 16, 2003
    Assignee: Hella KG Hueck & Co.
    Inventor: Michael Schellmann
  • Patent number: 6643000
    Abstract: An efficient system (10) for measuring target characteristics via a torsion mode beam of electromagnetic energy. The system (10) includes a first mechanism (34, 38, 40, 42, 16) for transmitting the torsion mode beam toward a target (12). A second mechanism (16, 18, 20) receives the resulting target return beam and provides a first signal in response thereto. A third mechanism (26, 28) employs the first signal to determine rotational characteristics of the target (12). In a specific embodiment, the system (10) further includes a fourth mechanism (20, 26) that reduces or eliminates noise in the return beam based on common mode noise rejection. A fifth mechanism (32) identifies the type of the target based on the target rotational characteristics via comparison to predetermined target rotational signatures (36). An additional mechanism (24, 40, 42) selectively switches the mode of the beam between a first mode and a second mode.
    Type: Grant
    Filed: January 17, 2002
    Date of Patent: November 4, 2003
    Assignee: Raytheon Company
    Inventor: David U. Fluckiger
  • Patent number: 6639548
    Abstract: An apparatus and method for generating an electromagnetic environment in which the free field, plane wave response of electronic systems of an electrically large (greater than several wavelengths in its longest dimension) object, or objects, under test can be measured in the electromagnetic radiating near field of the transmitter array apparatus. The apparatus comprises: (1) one or more transmitting station(s), each station home to an array of radiating elements; (2) a software operating system and computer that controls the electronic circuits of the apparatus and executes an optimizing algorithm based on a Genetic Algorithm to control the radiation of each transmitting station; and (3) mechanical and electrical circuits that enable the apparatus to conduct self calibration and adjustment as required. In operation, the apparatus is placed and distributed about an object under test.
    Type: Grant
    Filed: October 18, 2002
    Date of Patent: October 28, 2003
    Inventors: Clifton C. Courtney, Donald E. Voss
  • Patent number: 6618126
    Abstract: A surveying instrument having a sighting optical system and a phase-difference detection type focus detection device which detects a focus state of the sighting optical system from a correlation between a pair of images respectively formed by two light bundles which are respectively passed through two different pupil areas on an objective lens of the sighting optical system, the phase-difference detection type focus detection device includes a pair of line sensors, a condenser lens group for condensing the two light bundles which are respectively passed through the two different pupil areas, and a pair of separator lens groups for forming two images of the two light bundles which are passed through the condenser lens group on the pair of line sensors, respectively. The condenser lens group includes more than one sub lens group.
    Type: Grant
    Filed: May 29, 2001
    Date of Patent: September 9, 2003
    Assignee: Pentax Corporation
    Inventors: Masami Shirai, Masayuki Murata, Takayuki Ito
  • Patent number: 6618124
    Abstract: The invention provides a microphone/sensor, including a housing defining a chamber and having an opening; at least one pair of optical waveguides, each having an input end portion and an output end portion, the input end portion of a first waveguide being optically coupled to a source of light and the output end portion of a second waveguide being optically coupled to a light intensity detector; a membrane having two opposite surfaces extending across the opening to form a sealed-off chamber inside the housing; a head, including the input end portion of the second optical waveguide and the output end portion of the first optical waveguide, affixedly located at least in proximity to each other, each of the output end portion of the first waveguide and input end portion of the second waveguide having an optical axis and an output face, the output face being cut at an angle &thgr; with respect to the axis, the axes forming an angle &agr; between them, wherein, upon operation, the light emerging from the output e
    Type: Grant
    Filed: February 19, 2002
    Date of Patent: September 9, 2003
    Assignee: Phone-Or Ltd.
    Inventors: Alexander Paritsky, Alexander Kots
  • Patent number: 6617995
    Abstract: A radar detector includes an antenna for receiving a first signal of ultrahigh-frequency, a first local oscillator oscillating a second signal, a first filter removing noise from the second signal oscillated via the first local oscillator, a first mixer mixing the first signal of ultrahigh-frequency with a third signal filtered via the first filter, an intermediate frequency amplifier amplifying a fourth signal mixed at the first mixer, a second local oscillator oscillating a fifth signal, a second mixer mixing a sixth signal amplified via the intermediate frequency amplifier with the fifth signal oscillated by the second local oscillator, a second filter filtering a seventh signal mixed at the second mixer, a demodulator converting analog values of an eighth signal filtered by the second filter into digital values, a memory part storing data of relations between a ninth signal converted via the demodulator and the second and fifth signals oscillated by the first and second local oscillators, a central proces
    Type: Grant
    Filed: July 24, 2002
    Date of Patent: September 9, 2003
    Assignee: Microline Co., Ltd.
    Inventors: Jong-Kui Kim, Sang-Bo Min, Jae-Seok Oh, Dong-Gi Youn, Keun-Sik No
  • Patent number: 6618123
    Abstract: The invention provides a range finder capable of carrying out three-dimensional measurement stably for a long period of time. A light pattern is projected on a subject by using a light source array unit in which a plurality of light sources, such as LEDs, are arranged. Even when each LED has a small light quantity, a sufficiently large quantity of light can be projected on the subject by the entire light source array unit, and hence, the three-dimensional measurement can be stably carried out. Also, a plurality of light patterns can be generated by electrically controlling a light emitting state of each LED of the light source array unit.
    Type: Grant
    Filed: October 15, 2001
    Date of Patent: September 9, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kenya Uomori, Atsushi Morimura, Joji Wada, Takeo Azuma
  • Patent number: 6614509
    Abstract: This distance measuring apparatus projects a first distance measurement light ray from an IRED and projects a second distance measurement light ray having an intensity higher than that of the IRED from a flash light emission portion. A distribution of incident light from the subject is converted into an electrical signal by a sensor array. A CPU determines a distance to the subject from an output of the sensor array when the first distance measurement light ray is projected and determines a distance to the subject from an output of the sensor array when the second distance measurement light ray is projected. The CPU selects either the first distance measurement light ray or the second distance measurement light ray to be used for distance measurement based on an output level of the sensor array when the first and second distance measurement light rays are not projected.
    Type: Grant
    Filed: December 7, 2001
    Date of Patent: September 2, 2003
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Osamu Nonaka, Koichi Nakata
  • Patent number: 6608588
    Abstract: This invention features an improved technique for search and track surveillance. In this invention, distinct and random (in both space and time) signal beams are simultaneous transmitted from an array of transmitter source elements in a manner to cover all sectors about a source location. In addition, countermeasures against a system according to the invention are difficult because the signal waveforms for each beam are distinct and random, making prediction of any signal waveform for any beam very unlikely. An array of receiver sensor elements is provided to receive signals that are scattered from remote objects and may or may not be co-located with and share the elements of the source array element. The scattered signals are received and processed to yield the direction and range of the remote objects.
    Type: Grant
    Filed: May 7, 2001
    Date of Patent: August 19, 2003
    Assignee: Greenwich Technologies Associates
    Inventor: Carl M. Elam
  • Patent number: 6603424
    Abstract: A system is provided for reducing errors in synthetic aperture radar signals from a plurality of range lines where each range line includes a plurality of azimuth positions. The system comprises an autofocus processor for receiving a plurality of slow-time samples. The autofocus processor can estimate a phase error for each slow-time sample by a maximum likelihood technique and thereafter compensate the plurality of slow-time samples by the estimated phase errors to obtain a plurality of range-line samples. The implementation of the maximum likelihood technique is done by a superresolution technique along slow-time samples which also estimates a plurality of Doppler frequencies and amplitudes for a plurality of point scatterers at each range line. Further, the autofocus processor can also predict the performance of the autofocus technique by computing a resulting root mean square error of the estimated phase error which is derived form the corresponding Cramer Rao bound.
    Type: Grant
    Filed: July 31, 2002
    Date of Patent: August 5, 2003
    Assignee: The Boeing Company
    Inventor: Theagenis J. Abatzoglou
  • Patent number: 6597308
    Abstract: A modulation signal generation circuit performs frequency modulation of a VCO with a triangular wave for operation as an FM-CW radar. A signal processing circuit gives a modulation signal for detection generated from the modulation signal generation circuit to the VCO. A high-frequency signal subjected to frequency modulation in the VCO is transmitted as a radio wave from a transmission antenna and is reflected on a target and the reflected radio wave is received at a reception antenna. The reception signal and the high-frequency signal are mixed by a mixer to provide a beat signal and frequency shift corresponding to a voltage V1 is detected from the frequency of the beat signal. If the voltage V1 of the modulation signal for detection is switched, the frequency shift corresponding to different voltage V1 can be provided and the frequency modulation characteristic can be detected.
    Type: Grant
    Filed: July 11, 2002
    Date of Patent: July 22, 2003
    Assignee: Fujitsu Ten Limited
    Inventor: Osamu Isaji