Electro-optical Patents (Class 708/831)
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Patent number: 8838341Abstract: An electric drive steering locking apparatus according to an embodiment of the invention includes an electric motor, a motor driving control unit that allows the motor to perform locking actuation or unlocking actuation, a lower-level microcomputer that outputs an unlocking actuation signal and a locking actuation signal to the motor driving control unit, a first switching unit that electrically connects and disconnects a power supply route from the motor driving control unit to the motor, a checking power supply that applies a predetermined voltage to the electric motor; a switch unit that electrically connects and disconnects the checking power supply and the motor; a first diagnostic unit that outputs a voltage corresponding to an internal resistance of the electric motor; and a motor breakdown determination unit (lower-level microcomputer) that determines a breakdown of the electric motor by the voltage input from the first diagnostic unit.Type: GrantFiled: October 18, 2011Date of Patent: September 16, 2014Assignee: U-Shin Ltd.Inventor: Masakazu Kumano
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Patent number: 8285138Abstract: An optical correlation apparatus is described which forms first and second parallel optical signals in response to a serial input data stream. The first parallel optical signal is arranged to have bright pulses represent binary 1 and the second parallel optical signal is arranged to have bright pulses represent binary 0. A channel select means, such as an optical switch or amplitude modulator, deselects or blocks channels in the first parallel optical signal which correspond to binary 1 in a reference data string and also deselects or blocks channels in the second parallel optical signal which correspond to binary 0 in the reference data string. The remaining optical signals are combined at one or more detectors. Where the input data matches the reference data string each bright pulse in the first and second parallel optical signals is deselected and the detector registers zero intensity. However when there is any mismatch at least one channel will pass a bright pulse to the detector.Type: GrantFiled: December 17, 2007Date of Patent: October 9, 2012Assignee: Qinetiq LimitedInventors: Andrew Charles Lewin, David Arthur Orchard, Martin James Cooper
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Patent number: 8027587Abstract: A vector-matrix multiplier is disclosed which uses N different wavelengths of light that are modulated with amplitudes representing elements of an N×1 vector and combined to form an input wavelength-division multiplexed (WDM) light stream. The input WDM light stream is split into N streamlets from which each wavelength of the light is individually coupled out and modulated for a second time using an input signal representing elements of an M×N matrix, and is then coupled into an output waveguide for each streamlet to form an output WDM light stream which is detected to generate a product of the vector and matrix. The vector-matrix multiplier can be formed as an integrated optical circuit using either waveguide amplitude modulators or ring resonator amplitude modulators.Type: GrantFiled: August 20, 2008Date of Patent: September 27, 2011Assignee: Sandia CorporationInventor: Michael R. Watts
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Patent number: 7536431Abstract: An integrated VMM (vector-matrix multiplier) module, including an electro-optical VMM component that multiplies an input vector by a matrix to produce an output vector; and an electronic VPU (vector processing unit) that processes at least one of the input and output vectors. Various error reducing mechanisms are also discussed.Type: GrantFiled: September 3, 2002Date of Patent: May 19, 2009Assignee: Lenslet Labs Ltd.Inventors: Avner Goren, Aviram Sariel, Shimon Levit, Yosefa Asaf, Sergio Liberman, Benzion Sender, Tzvi Tzelnick, Yaron Hefetz, Eyal Moses, Vered Machal
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Patent number: 7180645Abstract: An apparatus for generating a quantum state of a two-qubit system including two qubits, each qubit being represented by a particle which invariably travels through one of two paths, includes a quantum gate composed of an interferometer for implementing an-interaction-free measurement. The apparatus receives two particles having no correlation and generates a Bell state with asymptotic probability 1. A Bell measurement of a state of a two-qubit system is performed by observing a quantum gate composed of the interferometer after the quantum gate has processed the state and selecting the state from the Bell bases. An approximate fidelity of a quantum gate composed of the interferometer is calculated, if an absorption probability with which a first particle absorbs a second particle in the interferometer is less than 1, under the condition that the number of times the second particle hits beam splitters in the interferometer is sufficiently large.Type: GrantFiled: March 29, 2004Date of Patent: February 20, 2007Assignee: Canon Kabushiki KaishaInventor: Hiroo Azuma
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Patent number: 6995404Abstract: Techniques are provided that use the quantum Zeno effect to implement practical devices that use single photons as the qubits for quantum information processing. In the quantum Zeno effect, a randomly-occurring event is suppressed by frequent measurements to determine whether the event has occurred. The same results can be obtained by using atoms or molecules or ions to react to the occurrence of the event. Techniques include directing one or more input qubits onto a device and applying a quantum Zeno effect in the device. The quantum Zeno effect is applied by consuming one or more photons in the device under conditions in which photons, that would otherwise be output by the device, do not represent a result of a particular quantum information processing operation. Devices implemented using the quantum Zeno effect can operate with low error rates without the need for high efficiency detectors and large number of ancilla.Type: GrantFiled: June 29, 2004Date of Patent: February 7, 2006Assignee: The Johns Hopkins UniversityInventors: James D. Franson, Bryan C. Jacobs, Todd B. Pittman
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Patent number: 6178020Abstract: A method for all photonic computing, comprising the steps of: encoding a first optical/electro-optical element with a two dimensional mathematical function representing input data; illuminating the first optical/electro-optical element with a collimated beam of light; illuminating a second optical/electro-optical element with light from the first optical/electro-optical element, the second optical/electro-optical element having a characteristic response corresponding to an iterative algorithm useful for solving a partial differential equation; iteratively recirculating the signal through the second optical/electro-optical element with light from the second optical/electro-optical element for a predetermined number of iterations; and, after the predetermined number of iterations, optically and/or electro-optically collecting output data representing an iterative optical solution from the second optical/electro-optical element.Type: GrantFiled: September 30, 1999Date of Patent: January 23, 2001Assignee: UT-Battelle, LLCInventors: David R. Schultz, Chao Hung Ma