Patents Examined by Stephen C. Buczinski
  • Patent number: 6734952
    Abstract: In geodetic measuring systems and measuring devices (14) there exists a need to find and detect, rapidly and automatically, marker points to be measured that are provided with a marker (retro reflector) (2a). For the rapid detection, identification and determination of the horizontal angles of such a marker, even at greater distances, electromagnetic radiation in the form of a vertical fan (17) is transmitted by a transmitter unit (1) whose radiation is received, after reflection from the marker, by a receiving unit with a view field in the form of a vertical fan. By analyzing the signal strength and the apparent object size, a plausibility test and a reliable suppression of foreign or interference markers can be achieved. Such a marker searching device is marked by a selective analysis of specific characteristics of a marker detected. On the basis of the plausibility test, a rapid, certain and robust location of markers is possible.
    Type: Grant
    Filed: January 17, 2003
    Date of Patent: May 11, 2004
    Assignee: Leica Geosystems, AG
    Inventors: Paul Benz, Markus Geser, Roland Graf, Bruno Pfiffner, Marcel Buerki, Marco Landert, Markus Hammerer, Jürg Hinderling, Günther Hanns, Gerhard Bayer
  • Patent number: 6731382
    Abstract: Techniques are disclosed for providing a system that has a plurality of devices in which the position of a device of the plurality of devices relative to another device of the plurality of devices is self-calibrated. In one embodiment, the system is a five-camera aligner for use in aligning motor vehicle wheels. In this embodiment, the aligner includes a first camera pod having two alignment cameras and a calibration camera, and a second camera pod having another two alignment cameras and a calibration target. Because the aligner has four alignment cameras and a calibration camera, the aligner is often referred to as a five-camera aligner. For illustration purposes, the first camera pod is herein referred to as the left camera pod and the second camera pod is herein referred to as the right camera pod. In one embodiment, the left camera pod is placed to the left of the aligner, and the right camera pod is placed to the right of the aligner.
    Type: Grant
    Filed: August 14, 2001
    Date of Patent: May 4, 2004
    Assignee: Snap-On Technologies, Inc.
    Inventors: David A. Jackson, Steven Glickman, Hoshang D. Shroff, Brian M. Bliven, Michael J. Kling, III
  • Patent number: 6727985
    Abstract: A system for signal acquisition in a distance meter includes at least one photoelectric receiver that detects electromagnetic radiation that is high-frequency modulated via a modulation frequency and converts the same to high-frequency electrical signals (HF). A device is provided for transforming the high-frequency electrical signals (HF) supplied by the photoelectric receiver into low-frequency measuring signals (NF) that can be passed on to a signal-processing unit mounted downstream of the device. The device for transforming the high-frequency electrical signals (HF) supplied by the photoelectric receiver into low-frequency measuring signals (NF) can include at least one switch whose switching frequency is controlled by a control frequency (F) whose frequency is higher or lower than the modulation frequency by the amount of the low-frequency measuring signal.
    Type: Grant
    Filed: March 19, 2003
    Date of Patent: April 27, 2004
    Assignee: Leica Geosystems AG
    Inventor: Kurt Giger
  • Patent number: 6727984
    Abstract: The invention relates to a multichannel receiver system (1) for angularly resolved laser ranging measurement, in which a laser light pulse from a laser (7) using the pulse travel time method is used to measure the ranges of a plurality of target points (6) by means of an array (2) comprising a plurality of apertures (3), of a photodetector (9) and of an evaluation circuit (10). The laser light pulses entering each of the apertures (3) and reflected by the target points (6) are distributed in a preselected distribution ratio between at least two optical fibers (511 to 543) with an individual length which corresponds to a light travel time tn,m, and are subsequently received by the photodetector (9) and are processed in the evaluation circuit (10). A unique assignment of the pulses to the respective apertures (3) is rendered possible by their spacings, specified in accordance with the distribution, and amplitudes. The ranges of the target points (6) can thereby be determined.
    Type: Grant
    Filed: December 30, 2002
    Date of Patent: April 27, 2004
    Assignee: Zeiss Optronik GmbH
    Inventor: Hubert Becht
  • Patent number: 6724470
    Abstract: A device for generating a laser beam in a LADAR system has a master oscillator with a laser-active medium and an amplifier stage in the form of a fiber optic power amplifier. This power amplifier amplifies the power of the oscillator. A carrier body is provided, on which a length of fiber of the power amplifier is coiled. The carrier body consists of a material of high thermal conductivity. The master oscillator may be a microchip laser. Diode lasers are used as pump light sources for the fiber optic power amplifier. This assembly can be made lightweight and compact, whereby it is particularly suitable for use in missiles.
    Type: Grant
    Filed: January 6, 2003
    Date of Patent: April 20, 2004
    Assignee: Bodenseewerk Gerätetechnik GmbH
    Inventors: Joachim Barenz, Frank Imkenberg, Hans-Dieter Tholl
  • Patent number: 6723974
    Abstract: A process for the adaptive beam control of medium-energy laser weapons for fighting electro-optical sensors and windows, wherein the behavior of the laser power reflected from a bright spot of the target and measured by a thermal image apparatus during increasing irradiation intensity is analyzed during a phase of measurement. The laser power to be emitted that will lead to the desired laser beam diameter or to the highest possible laser intensity at the target during the subsequent phase of fighting is then derived by calculation from this as well as other parameters influencing the thermal beam expansion. It is thus made possible that the laser does not always have to be operated with the maximum power, but only with the currently needed power during the phase of fighting, so that a saving is achieved in the consumption of primary laser energy. One example is explained.
    Type: Grant
    Filed: February 10, 1999
    Date of Patent: April 20, 2004
    Assignee: LFK Lenkflugkörpersysteme GmbH
    Inventor: Gunther Sepp
  • Patent number: 6724893
    Abstract: A method of passing a cryptographic key that allows recovery of the key by a third party by generating a first random number by a first user; generating “key1” by the first user; generating a second random number “k2a” by the first user; computing “y1” by the first user; computing “y2” by the first user; computing “r1” by the first user; computing “z” by the first user; computing “s” by the first user; computing “G” by the first user; passing (G,z,r1,s) from the first user to the second user; receiving “Y” by the second user; computing “T” by the second user; computing “y1” by the second user; computing “k1a” by the second user; computing “key1” by the second user; intercepting, by a third party, (G,z,r1,s) transmitted from the first user to the second user; presenting “G” and “z,” by the third party, to a key-escrow agent; computin
    Type: Grant
    Filed: October 11, 1996
    Date of Patent: April 20, 2004
    Assignee: The United States of America as represented by the National Security Agency
    Inventor: John Petro
  • Patent number: 6724467
    Abstract: A system and method for viewing objects at a fire scene allows fire fighters to view objects, including persons, in a smoke and fire filled environment. The present invention utilizes two different techniques to discriminate reflections from an object from scattered reflections from smoke and fire. In one embodiment of the invention, the coherent nature of laser light is employed to pick out objects. Another embodiment of the invention utilizes a time-gated approach to select reflections from objects which are located a specific distance from the laser transmitter.
    Type: Grant
    Filed: April 17, 2003
    Date of Patent: April 20, 2004
    Inventors: Richard I. Billmers, Elizabeth J. Billmers, Vincent M. Contarino, Rudolph Lucente, Mary E. Ludwig
  • Patent number: 6717655
    Abstract: A micropulse lidar system is described that comprises, a laser light source for emitting a pulsed laser beam, beam shaping means for shaping the intensity distribution of said beam such that said beam has a substantially annular intensity distribution in cross-section, a Schmidt-Cassegrain telescope for transmitting the annular beam to an atmospheric target and for collecting backscattered light returned from said target, and means for detecting and analyzing said backscattered light. The system has higher efficiency and better signal-to-noise ratio than a corresponding system without the beam shaping means. There is also disclosed a method for optimising the design of the beam shaping means.
    Type: Grant
    Filed: June 17, 2002
    Date of Patent: April 6, 2004
    Assignee: City University of Hong Kong
    Inventors: Yuk Sun Andrew Cheng, Yongkang Guo, Jianhua Zhu
  • Patent number: 6717656
    Abstract: The present invention is a method and an apparatus of a laser range detector, a delay circuit is comprised for generating a plurality of delay signals. With the delay signal, the precision of detecting could be improved without faster clock signals or higher power consumption.
    Type: Grant
    Filed: March 28, 2002
    Date of Patent: April 6, 2004
    Assignee: Asian Optical Co. Ltd.
    Inventors: Pie-Yau Chien, Chia-Jung Wu
  • Patent number: 6717654
    Abstract: An optical system is provided which combines range-finding (distance measurement), sighting (target acquisition) and scanning capabilities. This single beam system uses a polarization selector and a retardation plate to take advantage of the polarization properties of light from a transmit source and of light reflected to a receiver. The system further includes scanning optics for moving the optical beam of light in relation to object in order gather information from the object. Methods for using the system are also provided.
    Type: Grant
    Filed: February 8, 2000
    Date of Patent: April 6, 2004
    Assignee: Vantageport, Inc.
    Inventors: Suzanne K. Rajchel, Michael G. Ressl
  • Patent number: 6714285
    Abstract: In order to improve target illumination a light emitter comprises several partial light sources (3a, 3b, 3c, 3d), the partial beams (5a, 5b, 5c, 5d) of which are collected by means of a beam collector optic (2) and directed to the aperture of a collimator (1). The beam collector optic (2) comprises two half-mirrored sheets (12a, 12b), which each direct two similarly polarized partial beams (5a, b; 5c, d) side by side onto a polarization cube (13), where the pairs of partial beams which are polarized perpendicular and orthogonal to each other are overlaid.
    Type: Grant
    Filed: May 5, 2003
    Date of Patent: March 30, 2004
    Assignee: Leica Geosystems A.G.
    Inventors: Bernhard Gächter, Urs Vokinger
  • Patent number: 6714284
    Abstract: The present invention relates to a distance measuring device for measuring athlete throws in a throwing event at a track and field meet. The device is setup in a position outside a throwing circle and a landing area for the event being measured and is aimed at a target placed at a landing position of a thrown object. The present invention also relates to a method of using a distance measuring device to measure athlete throws in a throwing event at a track and field meet from a position outside of a throwing area and a landing area for a event being measured by aiming the device at a target placed at the landing position of a thrown object. The present invention further relates to a method of using a laser distance measuring device to determine the height of a cross bar in a leaping event at a track and field meet.
    Type: Grant
    Filed: May 24, 2002
    Date of Patent: March 30, 2004
    Inventors: Richard Grant Norman, James K. Hesch
  • Patent number: 6714286
    Abstract: An apparatus and method of dynamically optimizing an acquisition range of a radar system, including modulating a CW radar signal with a PN code that has an adjustable code frequency of modulation and an adjustable chip length. The method includes transmitting the modulated radar signal and receiving a return radar signal, based on the transmitted radar signal. The method continuously measures a SNR of the received return radar signal, and adaptively tunes the adjustable code frequency of modulation, and adaptively tunes the adjustable chip length, based on the continuously measured SNR. In this manner, the acquisition range of the radar system is optimized.
    Type: Grant
    Filed: December 6, 2002
    Date of Patent: March 30, 2004
    Assignee: ITT Manufacturing Enterprises, Inc.
    Inventor: Peter J. Wheel
  • Patent number: 6710860
    Abstract: Doppler sensor apparatus has means outputting coherent electromagnetic radiation (2), means (4) for transmitting radiation from the source means (2) to a point in space, means (6) for receiving radiation reflected from the point in space and means (8) for determining any Doppler shift in the reflected radiation. The transmitting means (2) and the receiving means (4) are separate, and the transmitting means (2) and the receiving means (4) are each adapted to have radiation guiding means (26, 28) releasably attached thereto, thereby enabling radiation guiding means (26, 28) for routing radiation from the source means (2) to the transmitting means (4) and from the receiving means to the determining means (8) to be interchanged with radiation guiding means (34, 36) for routing radiation for use in aligning the transmitting means (4) and the receiving means (6) to the transmitting means (4) and to the receiving means (6).
    Type: Grant
    Filed: May 23, 2002
    Date of Patent: March 23, 2004
    Inventor: Michael Harris
  • Patent number: 6710866
    Abstract: A device for determining the wheel and/or axle geometry of motor vehicles in a measuring space, using an optical measuring device having at least two image recording devices, which records from at least two different perspectives a marking device including a plurality of wheel features arranged on a wheel, at least one vehicle body feature and a reference feature array having at least three reference features offset in at least one plane, and having an evaluation device, the position of the reference features in the measuring space being known to the evaluation device, the recording of the marking device taking place during the passage of the motor vehicle and the axis of rotation of a measured wheel being ascertained by the simultaneous recording of the wheel features and of the at least one vehicle body feature at a plurality of points in time in the measuring space.
    Type: Grant
    Filed: June 7, 2002
    Date of Patent: March 23, 2004
    Assignee: Robert Bosch GmbH
    Inventor: Dietrich Adolph
  • Patent number: 6704097
    Abstract: The optoelectronic distance measuring, signal processing and display device and the operating method upon which such a device is based are characterized in that a current function state of the device and changes made thereto by the user are shown graphically on a display of the device by at least one of icons, numbers and symbols, wherein active changes in the currently indicated function state are carried out exclusively by selecting at least one of the respective icons and numerical input. In such a device, no language-specific or country-specific fonts and programming language components are needed.
    Type: Grant
    Filed: May 23, 2001
    Date of Patent: March 9, 2004
    Assignee: Hilti Aktiengesellschaft
    Inventors: Reinhard Waibel, Manfred Ammann
  • Patent number: 6700652
    Abstract: The invention of a Low-Cost alternating color-pulse digital particle-image velocimetry DPIV (Digital Particle Image Velocimetry) system is proposed. In the proposed system Low-Cost basic equipments are used such as a continuous-wave laser in mixed mode, a CCD (Charge Couple Device) camera, a PMT (Photo-Multiplier Tube), an image-processing card, a PC (personal computer) etc., with an add-on alternating-color planar laser-sheet generating facility to achieve the purpose of DPIV (Digital Particle Image Velocimetry) of planar velocity measurements. With the add-on facility, the laser beam from the continuous-wave laser operated in mixed mode is turned into a planar laser sheet with alternating color at a designated frequency. The CCD (Charge Couple Device) camera captures the alternating-color images of the flow field seeded with small particles.
    Type: Grant
    Filed: July 20, 2001
    Date of Patent: March 2, 2004
    Assignee: National Science Council
    Inventors: Yei-Chin Chao, Chih-Yung Wu, Yung-Li Chang
  • Patent number: 6697146
    Abstract: A range-finder, capable of finding a range by image realization, having two distantly arranged imaging devices. The first pattern having a predetermined size and the first positional information is extracted by the pattern extracting section from the first image of a target which has been made by the first imaging device. In the second image of the same target, which has been made by the second imaging device, the second pattern having the second positional information, which is most correlated with the first pattern in a plurality of upward and downward horizontal or vertical lines corresponding to the first positional information, is detected by the correlation processing section. Parallax is found from the first and the second positional information by the parallax calculating section. A distance to the target is found from this parallax by using the principle of triangulation.
    Type: Grant
    Filed: June 18, 2002
    Date of Patent: February 24, 2004
    Assignee: Fujitsu Ten Limited
    Inventor: Nobukazu Shima
  • Patent number: 6697148
    Abstract: A laser radar system is disclosed. The laser radar system includes a transmitting means that transmits a signal. The transmitted signal is formed by an optical signal that is amplitude modulated with a source signal thereby forming a transmitted signal having light packets at a repetition rate of the source signal. A receiving means that receives the transmitted signal after it is reflected from an object. A Doppler processor determines the Doppler frequency shift of the source signal from signals derived from the reflected signal.
    Type: Grant
    Filed: February 15, 2002
    Date of Patent: February 24, 2004
    Inventors: Francis W. Hopwood, John H. Glezen