Including Alignment Patents (Class 398/129)
  • Patent number: 10122456
    Abstract: Described herein is a ground based subsystem for inclusion in an optical gateway and for use in transmitting an optical feeder uplink beam to a satellite. The subsystem can include a wavelength-division multiplexing (WDM) multiplexer configured to receive optical data signals from optical network(s) external to the ground based optical gateway, and configured to combine the optical data signals into a wavelength division multiplexed optical signal. The subsystem can also include an optical amplifier to amplify the wavelength division multiplexed optical signal, and transmitter optics to receive the amplified wavelength division multiplexed optical signal and transmit an optical feeder uplink beam to the satellite in dependence thereon. In certain embodiments, the ground based optical gateway does not perform any modulation or demodulation of the optical data signals received from the optical network(s) external to the ground based optical gateway before they are provided to the WDM multiplexer.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: November 6, 2018
    Assignee: SPACE SYSTEMS/LORAL, LLC
    Inventor: William Hreha
  • Patent number: 10090959
    Abstract: A free space optical communications network comprises a constellation of relay nodes in serial optical communication to form an optical path. The relay nodes are configured to wavelength-multiplex a plurality of wavelength-dependent optical bent pipe channels into and out of the optical path.
    Type: Grant
    Filed: July 6, 2015
    Date of Patent: October 2, 2018
    Assignee: The Boeing Company
    Inventor: Stephen G. Lambert
  • Patent number: 10050699
    Abstract: Described herein is a space based subsystem of a satellite, and methods for use therewith, for receiving an optical ISL beam from another satellite, and in dependence therein, producing a further optical ISL beam for transmission to a further satellite. Additionally, the subsystem can also produce RF service downlink beams for transmission to service terminals. The subsystem can include, inter alia, receiver optics, optical amplifiers, a WDM demultiplexer, beam splitters, a WDM multiplexer, and transmitter optics. In certain embodiments, because RF frequencies of a wavelength division multiplexed optical signal produced by the WDM multiplexer are within a same specified RF frequency range within which the satellite and the further satellite are configured to transmit RF service downlink beams, there is an elimination of any need for the satellite and further satellite to perform any frequency conversions when producing the RF service downlink beams in dependence on the optical ISL beams.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: August 14, 2018
    Assignee: SPACE SYSTEMS/LORAL, LLC
    Inventors: William Hreha, Ghislain Turgeon, Vijaya Gallagher
  • Patent number: 10009111
    Abstract: A light fixture includes an array of light-emitting elements for generating light from the light fixture, and the array of light-emitting elements includes a defined sub-array of light-emitting elements. An alternate array of light-emitting elements is coupled in parallel with the defined sub-array of alternate light-emitting elements of the light emitter. Each of the sub-array and the alternate array are coupled with a respective switch element. A control circuit is coupled with the switch elements and configured for selectively switching power between the sub-array and the alternate array for modulating the operation of the sub-array and alternate array of light-emitting elements to generate modulated communication signals.
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: June 26, 2018
    Assignee: LSI Industries, Inc.
    Inventors: Robin Tim Frodsham, Mark Van Wagoner
  • Patent number: 9991958
    Abstract: A portable optical ground station can track a satellite with an amateur telescope mounted on a two-axis gimbal. The telescope is aligned with respect to an inertial, Earth-fixed frame using a wide field of view star camera. Star cameras are accurate to the arcsecond level and have the advantage of providing orientation with a single measurement. Using multiple star sensor measurements at different gimbal angles, it is possible to calculate the alignment of the gimbals in the Earth-fixed frame and the alignment of the star sensor in the gimbal frame. Once the alignment is obtained, satellite tracking can be achieved with a known orbit and precise Earth rotation model, such as the International Earth Rotation and Reference System Service (IERS). This alignment procedure can be carried out in less than one hour, making it practical to move and deploy the portable ground station.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: June 5, 2018
    Assignee: Massachusetts Institute of Technology
    Inventors: Kathleen Michelle Riesing, Hyosang Yoon, Kerri Lynn Cahoy
  • Patent number: 9979465
    Abstract: Described herein is a space based subsystem of a satellite, and methods for use therewith, for producing and transmitting an optical ISL beam to another satellite. The subsystem can include, inter alia, receiver optics, optical amplifiers, a WDM demultiplexer, beam splitters, a WDM multiplexer, and transmitter optics. The transmitter optics may be configured to receive an amplified wavelength division multiplexed optical signal and, in dependence thereon, transmit an optical ISL beam to another satellite. In certain embodiments, because RF frequencies of a wavelength division multiplexed optical signal produced by the WDM multiplexer are within a same specified RF frequency range within which the other satellite is configured to transmit RF service downlink beams, there is an elimination of any need for the other satellite to perform any frequency conversions when producing the RF service downlink beams in dependence on the optical ISL beam.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: May 22, 2018
    Assignee: SPACE SYSTEMS/LORAL, LLC
    Inventors: William Hreha, Ghislain Turgeon, Vijaya Gallagher
  • Patent number: 9971060
    Abstract: A sensor includes a first reception unit configured for sensing a first signal of a first frequency band and a second reception unit configured for sensing a second signal of a second frequency band. There is a height difference between the first reception unit and the second reception unit.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: May 15, 2018
    Assignee: SensorTek technology Corp.
    Inventors: Huan-Hsiang Weng, Feng-Jung Hsu, Chu-Yuan Yang, Chih-Wei Chen, Yi-Hua Chang
  • Patent number: 9973274
    Abstract: A fast tracking module for use in free space optical communications includes a primary motion stage supporting receive optics, where the primary motion stage is configured to move the receive optic relative to an optical path.
    Type: Grant
    Filed: October 7, 2016
    Date of Patent: May 15, 2018
    Assignee: SA Photonics, Inc.
    Inventors: J. Elon Graves, David Pechner, Andrew Olson
  • Patent number: 9961725
    Abstract: This invention relates to a light emitting diode driving circuit (101) for use in an optical transmitter (100) comprising: a high-speed signal path (102) comprising a high-speed trans-conductance amplifier (114) configured for a linear transformation of an input signal to an output signal for linear modulation of a light emitting diode (110), and a low-frequency control path (103) configured for generating a trans-conductance (115) in dependence of a low-frequency component of the input signal (106), and wherein the low-frequency control path (103) is configured for controlling the trans-conductance (116) of the high-speed trans-conductance amplifier (114).
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: May 1, 2018
    Assignee: Knowledge Development For POF SL
    Inventors: Luis Rolindez Alberich, Alberto Rodriguez-Perez, Ruben Perez de Aranda Alonso
  • Patent number: 9954612
    Abstract: A method and system for establishing a free space optical link that includes creating a first link between a first vehicle and a second vehicle and pointing a laser from the first vehicle to the second vehicle. The method includes steering the laser in a spiral pattern and recording a time at the first vehicle of each incremental position of the laser in a spiral pattern. The method includes detecting the laser at the second vehicle, recording the time of detection at the second vehicle, and steering the laser to the positions that coincide with the detection times of the second vehicle to establish an optical link between the first and second vehicles. The first link may be a RF link. The free space optical link may be created with a conformal panel having an RF array, an optical detecting aperture, and an optical beam directing aperture.
    Type: Grant
    Filed: December 6, 2017
    Date of Patent: April 24, 2018
    Assignee: THE BOEING COMPANY
    Inventor: Christopher M. La Fata
  • Patent number: 9806809
    Abstract: Various of the disclosed embodiments relate to line-of-sight (LOS), e.g., optical, based networks. Systems and methods for determining where to place and how to configure nodes in an optically connected network across a geographic region are provided. Various factors concerning the region may be collected, including, e.g.,: building locations and height, building types, population densities, backbone connection locations, recurring weather factors, geographic elevation, etc. The algorithm may iteratively place nodes based upon the accessible range of a preceding contemplated node position.
    Type: Grant
    Filed: November 6, 2014
    Date of Patent: October 31, 2017
    Assignee: Facebook, Inc.
    Inventors: Andreas Gros, Yael Maguire, Karthik Yogeeswaran
  • Patent number: 9778028
    Abstract: In a directed infrared countermeasure system, to assure parallelism between the line-of-sight to a target and the output beam, the input and output mirrors are fixedly attached to a uni-construction arm mounted to a rotatable azimuth platter to which internal mirrors are also fixedly attached. A system is provided for zeroing out alignment errors by developing an aim-point map for the gimbal that records initial alignment errors induced by manufacturing tolerances and uses the aim-point map error values to correct the output mirror orientation. The system also corrects for alignment errors induced by thermal gradients.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: October 3, 2017
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventors: Armando Corella, Lynne F. Buzdar, Ronald A. Gidseg
  • Patent number: 9538559
    Abstract: A system for facilitating radio communication using targeting devices is disclosed. In one embodiment, the targeting device includes a wireless microphone. The wireless microphone is wirelessly connected to a communication device. Further, the targeting device includes an activation button to activate the communication device. In this embodiment, the wireless microphone transmits an audio signal to the communication device upon activating the communication device.
    Type: Grant
    Filed: October 1, 2014
    Date of Patent: January 3, 2017
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventors: Michael J. Choiniere, Mark P. Devins, David A. Richards
  • Patent number: 9503182
    Abstract: A method and system for reducing optical signal fading in an optical communication system include: dynamically obtaining turbulence-induced divergence and deviations of pointing direction for the atmosphere where an optical signal to be transmitted through; generating a single-transverse-mode laser beam of a predetermined diameter as the optical signal; dynamically varying the diameter of the laser beam to match the obtained turbulence-induced divergence of the atmosphere with a backtrack pointing direction; and transmitting the laser beam with varying diameter to a remote transceiver, as the optical signal.
    Type: Grant
    Filed: August 20, 2014
    Date of Patent: November 22, 2016
    Assignee: Raytheon Company
    Inventors: Alexander A. Betin, Vladimir V. Shkunov
  • Patent number: 9443186
    Abstract: Method and apparatus for mounting RFID devices to process control devices are disclosed. An example apparatus includes a mount to couple a radio-frequency identification tag to a field device. The mount is rotatable relative to the field device to adjust the radio-frequency identification tag to be oriented relative to a radio-frequency identification reader. The mount includes a first portion to be coupled to the field device and a second portion to receive the radio-frequency identification tag.
    Type: Grant
    Filed: June 9, 2014
    Date of Patent: September 13, 2016
    Assignee: Fisher Controls International LLC
    Inventor: Michel Ken Lovell
  • Patent number: 9436608
    Abstract: Embodiments of the disclosure relate to optimizing a memory nest for a workload. Aspects include an operating system determining the cache/memory footprint of each work unit of the workload and assigning a time slice to each work unit of the workload based on the cache/memory footprint of each work unit. Aspects further include executing the workload on a processor by providing each work unit access to the processor for the time slice assigned to each work unit.
    Type: Grant
    Filed: February 12, 2015
    Date of Patent: September 6, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Ansu A. Abraham, Daniel V. Rosa, Donald W. Schmidt
  • Patent number: 9356695
    Abstract: A method of aligning an optical beam includes transmitting a first beam from a first optical transceiver to a second optical transceiver. A position of the second optical transceiver is adjusted based upon the received first beam. A second beam is transmitted from the second optical transceiver to the first optical transceiver. A command signal is transmitted from the second optical transceiver to the first optical transceiver. In response to the command signal, a position of the first optical transceiver is adjusted based upon the received second beam.
    Type: Grant
    Filed: March 26, 2009
    Date of Patent: May 31, 2016
    Assignee: Robert Bosch GmbH
    Inventor: William DiPoala
  • Patent number: 9274292
    Abstract: A signal transmitting connector of the present disclosure includes a connection terminal portion comprising a terminal that executes at least one of outputting of an electric signal to an external device or inputting of the electric signal from an external device, a connector portion comprising a photoelectric converting portion that executes photoelectric conversion between an optical signal and the electric signal, and a cable holding portion that holds an optical fiber transmitting the optical signal, the cable holding portion comprising one or a plurality of cable holding portion mirror(s) each forming an optical path between the optical fiber and the photoelectric converting portion.
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: March 1, 2016
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Chie Sasaki, Tsutomu Niiho
  • Patent number: 9219984
    Abstract: System and method for wireless infrared-aided location, including: a portable tag to be located, the portable tag comprising an infrared (IR) receiver; and a plurality of base-stations, at least one of said base-stations comprising: a processor coupled to a memory; a first clock coupled to the processor, the first clock configured to be selectively activated and deactivated by the processor; a receiver coupled to the processor, the receiver configured to receive a periodic timing synchronization signal; and an infrared transmitter coupled to the processor, the infrared transmitter configured to transmit an IR signal to the portable tag, wherein the IR signal is substantially identical and in-phase with IR signals from other base-stations, wherein the processor is configured to synchronize said base-station to the periodic timing synchronization signal.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: December 22, 2015
    Assignee: CENTRAK, INC.
    Inventors: Israel Amir, Deepak Gopi
  • Patent number: 9203522
    Abstract: An optical receiver includes an optical detector that is positioned to detect an optical data signal received from an optical channel generates a received electrical data signal at an output. An electrical switch passes one of the received electrical data signal and a second electrical signal depending upon a control signal applied to a control input. A data and clock recovery circuit generates a recovered clock and a recovered data signal when a signal-to-noise ratio of the received electrical signal is in a range where a signal locking condition is established, and generates the control signal at the control output that instructs the electrical switch to select the received electrical data signal if the signal locking condition is established and to select the second electrical signal if the signal locking condition is not established.
    Type: Grant
    Filed: August 19, 2008
    Date of Patent: December 1, 2015
    Assignee: Finisar Corporation
    Inventor: Osamu Mizuhara
  • Patent number: 9203524
    Abstract: Methods, systems, and computer readable for providing smart underwater free space optical communications are provided. According to one aspect, a system for smart underwater free space optical communications is provided. The system includes a receiver. The receiver includes an optical detector array for detecting incident light under water. The receiver further includes a compound lens array located optically in front of the optical detector. The compound lens array includes lenses that steer incident light arriving at different angles to different portions of the optical detector array. A controller processes signals generated by the optical detector based on the incident light and controls an aspect of the underwater communications based on the steered incident light detected by the detector array.
    Type: Grant
    Filed: December 18, 2013
    Date of Patent: December 1, 2015
    Assignee: NORTH CAROLINA STATE UNIVERSITY
    Inventors: Jim Anto Simpson, John F. Muth
  • Patent number: 9143697
    Abstract: Lighting and control systems and methods for a lighting node and a remote control device are disclosed. The remote control device may be coupled to the lighting node via an identification process, such as broadcasting an identification request from the remote control device to nearby lighting nodes. The lighting node can respond to the identification request by sending an identifier to the remote control device such that future commands sent from the remote control device is limited to be responded by the lighting node having the identifier stored thereon. Once coupled, the remote control device can adjust spectral content produced by the lighting node based on user-configuration or a color profile captured via an optical sensor. The adjustment via the remote control device may further include calibration and recalibration of the lighting node utilizing a feedback mechanism with the optical sensor.
    Type: Grant
    Filed: March 21, 2013
    Date of Patent: September 22, 2015
    Assignee: LUMENETIX, INC.
    Inventor: Matthew D. Weaver
  • Patent number: 9117276
    Abstract: Provided are a method and a system for the correction of an optical satellite image, the method including: a first step in which a satellite image judgment unit inputs and receives a plurality of satellite images divided according to spectral information and judges whether or not some area is a missing satellite image; a second step in which when the satellite image judgment unit judges that the some areas is the missing satellite images, a first interpolation unit inputs and receives the plurality of satellite images and carries out one-dimensional interpolation for each satellite image; a third step in which a second interpolation unit carries out two-dimensional interpolation for each satellite image in which the one-dimensional interpolation is carried out; and a fourth step in which a satellite image composing unit composes a corrected satellite image by gathering each satellite image in which the two-dimensional interpolation is carried out.
    Type: Grant
    Filed: April 15, 2013
    Date of Patent: August 25, 2015
    Assignee: KOREA METEOROLOGICAL ADMINISTRATION
    Inventors: Chang Wook Lee, Min Ji Cho, Zhong Lu, Young Jean Choi
  • Patent number: 9106192
    Abstract: Systems and methods are provided for device playback calibration. In one example, a calibration device with a microphone and signal processor may detect audio content rendered by a playback device. The calibration device may transmit the detected audio content to a processing unit configured to determine an equalization setting for optimal playback of the playback device based on the received detected audio content and a relative distance and direction between the playback device and the calibration device. The calibration device may further be configured to modulate the detected audio content before transmitting the detected audio content to the processing unit to accommodate for a limited frequency range of the processing unit. In this case, the processing unit may demodulate the received signal prior to determining the equalization setting. The processing unit may then transmit the determined equalization setting to the playback device according to a wireless communication protocol.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: August 11, 2015
    Assignee: Sonos, Inc.
    Inventors: Timothy Sheen, Ananth Jasty, Aurelio Ramos
  • Patent number: 9054799
    Abstract: A wireless light communication system and method using a plurality of light transmitting units driven by a same alternating current (AC) power, and a light receiving unit for receiving optical signals transmitted by the plurality of light transmitting units are provided. The wireless light communication method includes setting a channel for each of the plurality of light transmitting units such that light transmitting units having an overlapping area that is reachable by optical signals use different channels, detecting zero crossing of the AC power, synchronizing channels by using the detected zero crossing, and transmitting an optical signal through the set channel by using the plurality of light transmitting units, and receiving the optical signal transmitted by each of the plurality of light transmitting units by using the light receiving unit, and analyzing information included in the received optical signal.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: June 9, 2015
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Seong-man Park, Young-jun Choi
  • Patent number: 9014553
    Abstract: A satellite test signal reflection apparatus for testing transmitters sending out optical signals, the apparatus includes a plate that is at least partially permeable to optical signals. The plate has a base with a first surface with a residual reflective coating and a second surface. The residual reflective coating is configured to split an optical beam, which penetrates the plate in a first direction from the first surface to the second surface, into a reflective optical beam and a transmitted optical beam.
    Type: Grant
    Filed: June 24, 2013
    Date of Patent: April 21, 2015
    Assignee: Tesat-Spacecom GmbH & Co. KG
    Inventor: Andreas Weichert
  • Patent number: 8995839
    Abstract: A gearbox IC is incorporated into an optical communications system to enable an optical link that incorporates the system to achieve data rates that are at least double that which are currently achievable in optical links. The gearbox IC performs data rate conversion and phase alignment. In the transmit direction, the gearbox IC receives N lanes of electrical data signals having a data rate of X Gbps and outputs N/2 lanes of electrical data signals having a data rate of 2X Gbps. In the receive direction, the gearbox IC receives N/2 electrical data signals having a data rate of 2X Gbps and converts the N/2 electrical data signals into N electrical data signals having a data rate of X.
    Type: Grant
    Filed: July 9, 2012
    Date of Patent: March 31, 2015
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Faouzi Chaahoub, Georgios Asmanis, Samir Aboulhouda, Michael A. Robinson, Ravi T. Kotamraju
  • Patent number: 8977135
    Abstract: A system comprises a transmitter including a laser configured to generate a laser beam directed at a spot on a surface, and a laser driver connected to the laser and configured to modulate input data onto the laser beam. The system may further comprise a receiver including an optical detector configured to decode received light into raw data, a signal processor configured to decode the raw data into the original input data, and telescope optics configured to receive light reflected from the spot on the surface, collimate the light and converge the light onto the optical detector.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: March 10, 2015
    Assignee: Verizon Patent and Licensing Inc.
    Inventors: Tiejun J. Xia, Glenn A. Wellbrock
  • Patent number: 8948601
    Abstract: Embodiments of the present invention are directed to a system and method for indoor wireless optical communication. The system may include a central unit and a plurality of user units. A bi-directional optical communication link may be established over a collimated invisible light beam to enable transmission of wireless communications between a remote communication device and a user unit. The central and user units include an optical transmitter. At least one of the user unit and the central unit comprises a visible light source configured to produce a collimated visible light beam to enable alignment of the user unit and the central unit upon establishment of the bi-directional optical communication link.
    Type: Grant
    Filed: July 10, 2012
    Date of Patent: February 3, 2015
    Assignee: RIT Technologies Ltd.
    Inventors: Alex Shar, David Kin, Boris Glushko, Erez Ben-Eshay
  • Patent number: 8917428
    Abstract: Disclosed is an image reading controller including an output unit that outputs plural control signals for controlling turning on and off of a light emitting unit of an image reading unit including the light emitting unit and a light receiving unit on respective transmission paths, the plural control signals satisfying at least one of a first condition that respective transmission paths are separated from each other by a predetermined distance or more and a second condition that types of the respective transmission paths are different from each other; and a controller that controls turning on and off of the light emitting unit on the basis of the plural control signals output from the output unit and input through the respective transmission paths.
    Type: Grant
    Filed: November 23, 2012
    Date of Patent: December 23, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Kazuaki Shintani
  • Patent number: 8909056
    Abstract: A lighting node is described. One embodiment of the lighting node includes a lamp, a radio device, and a memory. The lamp is configured for generating illumination. The radio device is configured for radio communication. The radio device is configured to remotely receive a color profile from the controller. The lamp is also configured to generate illumination to substantially match the received color profile. The memory is configured to store a group identifier for the lighting node.
    Type: Grant
    Filed: October 19, 2012
    Date of Patent: December 9, 2014
    Assignee: Lumenetix, Inc.
    Inventor: Matthew D. Weaver
  • Patent number: 8837949
    Abstract: A system, method, and optical communication device are disclosed. The system can include a plurality of optically coupled nodes forming an optical communication network. Each node may include an array of pixel elements, each pixel element having an optical detector and an active optical source. The pixel array may be disposed in a backplane of a lens that is configured to map incoming optical signals to pixel locations in the backplane according to their respective angles of incidence and to minimize a deviation at each pixel location between incoming optical signals arriving at the optical detector and emissions from the optical source. The node may include a processor and memory. The processor can register senders in the optical network at locations in the pixel array and can generate routing information by which to route communications from the registered senders to other pixel elements for transmission to their respective destinations.
    Type: Grant
    Filed: November 20, 2009
    Date of Patent: September 16, 2014
    Assignee: Cubic Corporation
    Inventors: Paul Amadeo, Allen Ripingill, David Robinson, Irene Chen
  • Patent number: 8818197
    Abstract: Methods and systems are provided for extending the range that a laser can transmit data, particularly in environments with high attenuation or turbidity. Particularly, an energy storing laser that is capable of continuously converting electrical energy to optical energy and storing the optical energy or the electrical energy in the energy storing laser until the energy storing laser is instructed to transmit a laser transmission. In some embodiments, the energy storing laser uses a pulse train with a low duty cycle to increase the peak power of each laser pulse. Also, a pointing and tracking system is used to provide a communication link between stationary platforms or moving vehicles.
    Type: Grant
    Filed: October 28, 2011
    Date of Patent: August 26, 2014
    Assignee: Lockheed Martin Corporation
    Inventor: Barton J. Jenson
  • Patent number: 8805191
    Abstract: An optical transceiver may include an optical fiber coupling assembly for coupling optical fibers to transmitter and receiver sub-assemblies to increase the number of usable channel wavelengths by reducing an incident angle on a WDM filter without causing unwanted back reflection to a laser. In one example, the optical fiber coupling assembly may be used to increase the number of usable channel wavelengths between the L-band and the C-band. The optical transceiver may be used, for example, in an optical line terminal (OLT) and/or optical networking unit (ONU) in a wavelength division multiplexed (WDM) passive optical network (PON) capable of transmitting and receiving optical signals on multiple channel wavelengths.
    Type: Grant
    Filed: September 29, 2011
    Date of Patent: August 12, 2014
    Assignee: Applied Optoelectronics, Inc.
    Inventors: I-Lung Ho, Jun Zheng, Chong Wang
  • Patent number: 8805192
    Abstract: A method and an apparatus are for directing an optical receiver toward a light source, using a plurality of light detectors arranged around the receiver's optical axis to check where light (L) hits the light detectors relative to the optical axis. The method includes the steps of: A) arranging the receiver defocused to embrace a largest possible field of view of the area wherein the light source may be located, and refracting the light with largest possible spread angle; B) letting the receiver search for the light source until the light (L) hits at least one of the light detectors; C) calculating where the light hits relative to the optical axis, and adjusting the receiver, directing the light toward the optical axis; D) reducing the field of view embraced by the receiver; and E) repeating the steps C and D until the light is concentrated in a smallest possible area.
    Type: Grant
    Filed: March 14, 2011
    Date of Patent: August 12, 2014
    Assignee: Polewall AS
    Inventor: Jan Eide
  • Patent number: 8774638
    Abstract: A handheld device includes: a transmitter or receiver of a signal beam for quantum key distribution; and a source of alignment beams that diverge from each other in a pattern that matches sensors on a station containing a receiver or transmitter for the quantum key distribution. The alignment beams from the handheld device are of sufficient intensity to produce on the station visible spots that facilitate manual alignment of the handheld device. The station can measure a position and a direction of respective alignment beams and dynamically steer the signal beam according to the measurements.
    Type: Grant
    Filed: July 31, 2009
    Date of Patent: July 8, 2014
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Joanna Duligall, Timothy Spiller, Radu Ionicioiu, Raymond G. Beausoleil, David A. Fattal
  • Patent number: 8767197
    Abstract: An automatic angle adjustment unit (70) engages with and drivers a horizontal adjustment-engagement member (33) and a vertical adjustment-engagement member (37) of an object detection device (D) from the exterior. The unit (70) includes: engagement-drive transmission sections (72 and 73) which removably engages with both adjustment-engagement members (33 and 37), from the front surface, and drives both adjustment-engagement members (33 and 37); clamping section (76) that is removably secured to the object detection device (D); and an adjustment unit control section (80) for performing a control for adjusting a horizontal angle and a vertical angle of an optical system, based on a detection signal level.
    Type: Grant
    Filed: November 6, 2012
    Date of Patent: July 1, 2014
    Assignee: Optex Co., Ltd.
    Inventor: Hiroyuki Ikeda
  • Patent number: 8761603
    Abstract: Examples and implementations of reconfigurable sensors in a sensor array for performing various reconfigurable sensing functions.
    Type: Grant
    Filed: February 25, 2010
    Date of Patent: June 24, 2014
    Assignee: OEwaves, Inc.
    Inventor: Lute Maleki
  • Patent number: 8734619
    Abstract: A method including directing a first radiation at a first copper-indium-gallium (CIG) sputtering target in a reactive copper indium gallium selenide (CIGS) sputtering process, detecting a first reflected radiation from the first CIG target and determining the amount of selenium poisoning of the first CIG target based on the first reflected radiation.
    Type: Grant
    Filed: March 2, 2011
    Date of Patent: May 27, 2014
    Assignee: Hanergy Holding Group Ltd.
    Inventor: John Corson
  • Patent number: 8725000
    Abstract: A method for correcting for optical channel bandwidth misalignment between output passbands of a first optical device and input passbands of a second optical device. The method may involve transmitting a plurality of optical signals from the output passbands of the first optical device, with each of the optical signals being transmitted within an associated one of the passbands of the output. The first plurality of optical signals may be received within the input passbands of the second optical device. The optical signals may be analyzed to determine if the passbands of the first optical device or the second optical device has shifted. A characteristic of a filter through which the optical signals pass may be altered to cause a needed degree of shifting of wavelength bands of the optical signals to bring the optical signals into alignment within the passbands of the second optical device.
    Type: Grant
    Filed: June 16, 2010
    Date of Patent: May 13, 2014
    Assignee: The Boeing Company
    Inventor: Thomas L. Weaver
  • Patent number: 8682171
    Abstract: A communication system includes a plurality of nodes and a plurality of point-to-point links that interconnect the plurality of nodes into a network. Each node includes an optical switch to controllably route a plurality of in-ports of the optical switch into a plurality of out-ports of the optical switch. Each point-to-point link includes a free space optical channel. A first free space optical channel couples to a first node through a receive path and through a transmit path. The receive path couples to a respective in-port of the optical switch of the first node, and the transmit path coupled to a respective out-port of the optical switch of the first node. In an alternative embodiment, a communication hub includes a plurality of neighborhood links, and a trunk coupled between the optical switch and a free space optical channel link to the network.
    Type: Grant
    Filed: June 16, 2009
    Date of Patent: March 25, 2014
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: David M. Britz, Jeevan Prakash Dodley, Lih-Yuan Lin, Robert R. Miller
  • Patent number: 8655180
    Abstract: The invention relates to base stations in communication networks. In more particular the invention relates to cellular base stations such as 3G/4G and WLAN base stations. Some or all of the aforementioned advantages of the invention are accrued with a fully photonic base station (200) that powers itself with solar photons, provides radio network access and relays an optical photonic beam (220, 221, 230, 231) through air encoded with the data from radio signals of computer users and mobile phone users to the Internet and the global telecommunication network. A system engineer can build a network with the inventive base stations in a matter of days. He simply walks to the roof of houses and points the optical beams to other base stations in adjacent houses.
    Type: Grant
    Filed: April 27, 2012
    Date of Patent: February 18, 2014
    Inventor: Mikko Vaananen
  • Patent number: 8611758
    Abstract: A system for bi-directional data transmission includes a first array coupled to a first subsystem and a second array coupled to a second subsystem. The first array includes a first plurality of transmitters that produce first optical signals that are transmitted through free space, and a first plurality of receivers. The second array includes a second plurality of transmitters that produce second optical signals that are transmitted through free space to the first plurality of receivers, and a second plurality of receivers that is configured to receive the first optical signals. An image-forming apparatus is operatively positioned between the first and second arrays and is configured to concurrently form an image of the first plurality of transmitters on the second plurality of receivers and an image of the second plurality of transmitters on the first plurality of receivers.
    Type: Grant
    Filed: May 7, 2008
    Date of Patent: December 17, 2013
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Huei Pei Kuo, Robert G. Walmsley, Shih-Yuan Wang
  • Publication number: 20130315604
    Abstract: The system provides a mobile, full bi-directional, free-space optical (FSO) network providing networkability and internet connectivity. Each mobile system has a FSO transceiver communicating via line-of-sight (LOS) with a stationary FSO transceiver. Alternatively, the mobile system communicates with a relay FSO transceiver that is in contact with another relay and/or a stationary FSO transceiver. The system has diversity of wavelengths through a multi- wavelength system operating predominately in the infrared spectrum. The network is directionally constrained by the optical components to reduce interference with other networks. Pointing, acquisition, and tracking (PAT) of the network optical signal generator and receivers assists optical performance.
    Type: Application
    Filed: February 7, 2012
    Publication date: November 28, 2013
    Applicant: The Board of Regents of the University of Oklahoma
    Inventors: Peter LoPresti, Hazem Refai
  • Patent number: 8588617
    Abstract: An optical transceiver assembly comprises a transmission system, a reception system and a coupling system which directs a part of the signals produced by the transmission system to the reception system. Said part of the transmission signals is detected by a photodetector matrix of the reception system, outside an useful zone of the matrix which is dedicated to the detection of the received signals. A transmission direction may therefore be determined in real time while the received signals are detected. A difference between the transmission direction and a reception direction of the transceiver assembly may then be precisely compensated for at each moment during a tracking step. The transceiver assembly may be a free space laser optical communication terminal.
    Type: Grant
    Filed: October 6, 2009
    Date of Patent: November 19, 2013
    Assignee: Astrium SAS
    Inventors: Ludovic Vaillon, Gilles Planche
  • Patent number: 8565611
    Abstract: An optically-connected system is disclosed for exchanging data among industrial automation devices, that is composed of a plurality of connection modules, where each module comprises at least two pairs of optical transmitters and receivers on the main side, and one optical receiver on the opposing main side, that are opposite with respect to another pair of transmitters and receivers in a following module; and where each one of the transmitters and receivers is adapted to communicate with industrial automation devices to cooperate for exchanging data between modules, sending one interrogation signal requesting an identity of the module and the receiver is adapted to send to each corresponding response signal containing characteristics of the receiver.
    Type: Grant
    Filed: July 5, 2012
    Date of Patent: October 22, 2013
    Assignee: Fidia S.p.A.
    Inventor: Giuseppe Morfino
  • Patent number: 8565607
    Abstract: A visible light multiplex communication system is presented which includes identification (ID) information and data information which can be simultaneously transmitted and received to and from a server and a plurality of clients by using visible light. Visible light ID communication and visible light data communication do not interfere with each other in the same space during visible light communication. In addition, data can be efficiently transmitted and received to and from a plurality of ID clients using visible light. In addition, visible light ID communication and visible light data communication can be efficiently performed in a state where interference between clients using different protocols does not occur in the same place. Furthermore, a specific unit that is capable of efficiently transmitting and receiving data to and from a plurality of clients by using visible light can be provided.
    Type: Grant
    Filed: May 20, 2011
    Date of Patent: October 22, 2013
    Assignee: Idro Co., Ltd.
    Inventors: Yanggi Kang, Jungsung Park, Kwangjin Oh
  • Patent number: 8552836
    Abstract: An alignment system for coupling a component to a vehicle includes at least one sensor target coupled to the component, and a controller assembly configured to transmit a signal towards the sensor target and receive a reflected signal from the sensor target, wherein the controller assembly is configured to output an orientation dataset for the component relative to the vehicle using the reflected signal. The system also includes a processing device communicatively coupled to the controller assembly, wherein the processing device is programmed to translate the orientation dataset and cause a set of component positioning signals based on the orientation dataset to be displayed at a user interface.
    Type: Grant
    Filed: October 20, 2008
    Date of Patent: October 8, 2013
    Assignee: The Boeing Company
    Inventors: Joshua R. Pollema, James V. Leonard, Richard E. Meyer, John D. Musgraves, Jr., William J. Ebert
  • Patent number: 8457498
    Abstract: Methods and apparatus for target identification are disclosed. An example method for target identification disclosed herein comprises establishing an optical communication link with a potential target, transmitting a first signal encoded with a first code to the potential target using the optical communication link, receiving a second signal from the potential target using the optical communication link, extracting a second code from the second signal, and identifying the potential target as a friendly asset based on the second code.
    Type: Grant
    Filed: July 20, 2007
    Date of Patent: June 4, 2013
    Assignee: AT&T Intellectual Property I, L.P.
    Inventor: Jerry Stewart
  • Patent number: 8451869
    Abstract: A network device includes a substitutor and a transmitter. The substitutor receives input columns of concurrently received input symbols. Each of the input columns includes one input symbol from each of a plurality of parallel input lanes. The substitutor generates output columns corresponding to the input columns, wherein each of the output columns includes one output symbol for each of a plurality of parallel output lanes. The substitutor replaces the output symbols of a selected column of the output columns with alignment symbols. The selected column is immediately followed by a second column, and the second column is immediately followed by a third column. The substitutor replaces the output symbols of the second column with disposable symbols, and replaces the output symbols of the third column with boundary symbols. The transmitter drives data onto a communications medium in response to the output symbols generated by the substitutor module.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: May 28, 2013
    Assignee: Marvell International Ltd.
    Inventor: William Lo