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| Number | Title | Issue Date |
| 8160454 | Method and apparatus for visible light communication using single light source Disclosed herein is a visible-light communication system according to one embodiment of the invention. The system comprises two apparatus. One apparatus emits a visible light beam on which is superimposed transmission data. From the void data represented by the visi... | 04/17/2012 |
| 8027591 | Resonant quantum well modulator driver A drive circuit and method of controlling a quantum well modulator are disclosed. The drive circuit can be disposed in an optical transceiver having a quantum well modulator configured to retro-modulate an incoming optical signal. The drive circuit can include separ... | 09/27/2011 |
| 7860401 | Quadrature amplitude modulation-modulated retro-reflector A method for point-to-point communication over an optical channel is provided. An optical beam is received at a first corner cube modulated retro-reflector. Simultaneously, the optical beam is received at a second corner cube modulated retro-reflector. The first and... | 12/28/2010 |
| 7796896 | Secure optical communication A secure optical communication scheme uses differential delay D in an unbalanced Mach-Zehender interferometer to provide two copies of the optical source signal at a remote phase modulator separated in time by D. As D is much bigger than the coherence time source, t... | 09/14/2010 |
| 7715727 | System and method for transmitting analog signals with a modulating retroreflector and hybrid amplitude and frequency modulation A system and method for encoding an analog input signal for optical transmission, including driving a voltage controlled oscillator with an analog input signal to produce a frequency modulated electrical signal having a frequency proportional to the amplitude of the... | 05/11/2010 |
| 7693426 | Laser-based communications with a remote information source System and techniques for transmitting information from a remote information source use a reflector for reflecting a laser beam or other light source back to its originating location. A reflector coupled to an information source receives a laser beam from a laser so... | 04/06/2010 |
| 7627255 | Satellite information autonomous distribution satellite, satellite information collecting system, and satellite terrestrial test system In order to provide a satellite information autonomous distribution satellite capable of collecting attribute information for satellites after failure or damage occurs at or to the satellite, an information collection device is operated by a second power supply prov... | 12/01/2009 |
| 7603041 | Temperature compensated dynamic optical tag modulator system and method A dynamic optical tag system and method that allows for operation over a wide temperature range. A variable wavelength optical source, such as a dual wavelength fiber laser, is generated by combining the outputs from two distributed feedback lasers having separate o... | 10/13/2009 |
| 7403712 | Matrix time division multiplex (MTDM) interrogation Embodiments of present system encompass: a plurality of laser sources that produce a plurality of respectively different optical wavelengths; a matrix switch having a plurality of inputs operatively coupled to the plurality of laser sources, each of the plurality of... | 07/22/2008 |
| 7386235 | Protocol and line-rate transparent WDM passive optical network The present invention provides a method, apparatus and system for a protocol and line-rate transparent WDM passive optical network architecture that scales in terms of bandwidth and number of ONUs. Both an included optical line terminal and each of a plurality of ON... | 06/10/2008 |
| 7373044 | Optical link module, optical interconnection method, information processor including the optical link module, signal transfer method, prism and method of manufacturing the prism An optical link module of the present invention for connecting light beams by deflection and including light-emitting devices arranged in a planar manner; an optical fiber bundle that is an optical waveguide for receiving the light beams from the light-emitting devi... | 05/13/2008 |
| 7366423 | System having multiple agents on optical and electrical bus A system includes multiple agents coupled to an optical bus for transmission of high speed signals and to an electrical bus for transmission of low speed signals. The agents can be memory modules, such as DIMMs. An optical connector housing for coupling the agent to... | 04/29/2008 |
| 7336898 | Fibre optic communications network A security system for controlling access to an enclosed conduit along which runs fiber optic cable, the conduit having a cover for access to the cable, the system having a communications receiver and a modulator responsive to an output of the receiver for coupling n... | 02/26/2008 |
| 7327919 | Fiber optic audio cable A signal transmission media for transmission of signals such as audio and/or video from a transmission apparatus to a receiving apparatus. The signal transmission media has a first connector in contact with the transmission apparatus to receive the signal and is com... | 02/05/2008 |
| 7317876 | Medium access control for retro-reflectors A method, a device and a system for communications to and from a retro-reflector device (302) is provided. The retro-reflector device (302) receives a first frame (400) encoded in an input beam (106). The retro-reflector device (302 | 01/08/2008 |
| 7308207 | Method for identifying an interrogated object using a dynamic optical tag identification system An interrogator identifies an interrogated object using a light transceiver and a dynamic optical tag associated with the interrogated object. The dynamic optical tag receives an output light beam from the light transceiver and controllably reflects the light beam b... | 12/11/2007 |
| 7295111 | Microwave detection system and method for detecting intrusion to an off-limits zone A system and method are provided for automatically detecting intrusion in an off-limits zone. The system includes a transmitter transmitting a signal along a path likely to encounter an intruder to the off-limits zone and a modulating reflector for receiving the tra... | 11/13/2007 |
| 7271898 | Method and system for remote sensing of optical instruments and analysis thereof A sensor is provided for analyzing an object at a focal point of a lens. The sensor includes a focused radiant energy source directed at the lens. The focused radiant energy source transmits a first beam of energy to the lens, vaporizing a portion of the object at t... | 09/18/2007 |
| 7224905 | Remotely-interrogated high data rate free space laser communications link A system and method of remotely extracting information from a communications station by interrogation with a low power beam. Nonlinear phase conjugation of the low power beam results in a high power encoded return beam that automatically tracks the input beam and is... | 05/29/2007 |
| 7212738 | Preventing signal loss in an optical communications network A redundant optical signal transmission and reception system enables information exchange via an optical communications network without data loss in the event of optical transmitter or receiver failure. In one embodiment, the redundant optical signal system includes... | 05/01/2007 |
| 7190907 | Dynamic optical tag An optical tag, having a photo-detector, a controller, a piezoelectric translator, a battery and a retro-reflective tape. The photo-detector is responsive to an optical energy at a predetermined wavelength, and the controller is connected to the output of the photo-... | 03/13/2007 |
| 7187871 | Interferometric communication system and method High bandwidth angle modulated communications may be obtained using an incoherent/broadband “white light” source. The light is passed through interferometer arms before and after a communication link. The light is modulated in a transmitter signal optical angle ... | 03/06/2007 |
| 7184670 | Telemetry system and method for acoustic arrays A telemetry system includes a plurality of acoustic sensors for receiving acoustic information and generating analog signals based on the received acoustic information. A first plurality of subsystems is coupled to at least a subset of the plurality of acoustic sens... | 02/27/2007 |
| 7151479 | Radar sensor for motor vehicles Radar sensor for motor vehicles, having a transmitter and receiver unit whose directional characteristic has multiple lobes, at least one of which is directed parallel to the roadway surface, at least one other lobe being directed obliquely to the roadway surface. | 12/19/2006 |
| 7095962 | Optical transmission system An optical transmission system of the present invention includes input ports to which laser beams are respectively input, condensing, input optical elements, input reflectors corresponding one-to-one to the input optical elements each, output reflectors, output opti... | 08/22/2006 |
| 7079774 | Free-space optical communication system A free-space optical communication system serves transmit/receive subscriber terminals. Each subscriber terminal includes a photo-detector and one or more sources of modulated radiation. A base terminal comprises sources of modulated optical radiation intended for t... | 07/18/2006 |
| 7072475 | Optically coupled headset and microphone Apparatus and methods for transferring audio between a headset and electronic equipment over an optical link. The apparatus includes an electro-optical interface for electrically connecting to the electronic equipment, an optical link, and an electro-optical headset... | 07/04/2006 |
| 7068941 | Interactive talking dolls A set of interactive toys that perform a sequence of actions in response to one another without external activation other than an initial actuation to begin the sequence of actions. Preferably, each toy has an activation switch and/or a receiver for a wireless signa... | 06/27/2006 |
| 7064703 | Methods and apparatus for randomly modulating radar altimeters A method for randomly phase modulating a radar altimeter is described. The method includes momentarily applying a signal from a random noise source to an amplifier, applying an output of the amplifier to a voltage controlled oscillator (VCO), applying an output of t... | 06/20/2006 |
| 7054563 | Multi-channel optical communication system that controls optical reflection for each channel and optical transmitting and receiving apparatus therefor A multi-channel optical communication system includes an optical transmitting apparatus and an optical receiving apparatus. The optical transmitting apparatus has a retroreflector and a modulator for modulating light reflected by the retroreflector according to a tr... | 05/30/2006 |
| 7035546 | Optical wireless multiport hub An optical communication transmitter (13), receiver (15), and transceiver (17) having distinctive retro-reflective elements (30) and/or reflectivity that can be modulated. In one embodiment, the retro-reflective elements (30) can h... | 04/25/2006 |
| 7034741 | Apparatus for detecting position information of a moving object An apparatus for detecting position information of a moving object. The apparatus includes a transponder, a communication module, and a reader. The transponder is installed on a predetermined location of a road and stores position information associated with the ins... | 04/25/2006 |
| 6993255 | Method and apparatus for providing adaptive illumination An illumination system (20, 72, 110, 142) for illuminating a scene comprising: an illuminator (24, 74, 116) having a plurality of substantially contiguous independently controllable light (26, 76) providing regions each of which provides light t... | 01/31/2006 |
| 6970653 | Fiberoptic system for communicating between a central office and a downstream station A fiber optic system for communicating between a central office and a downstream station is described. The central office has a TX unit, an RX unit and a continuous wave (“CW”) laser. Each station has an RX unit and a tunable filter coupling the RX unit to the c... | 11/29/2005 |
| 6934475 | Free-space optical communications using holographic conjugation A beacon beam is transmitted from a receiver to a transmitter. The transmitter generates and transmits a conjugate beacon beam back to the receiver, where it is interfered with a local oscillator beam to form a hologram. The hologram is used to configure a spatial l... | 08/23/2005 |
| 6768873 | Optical communication system using optical transcription material An optical communication system for communicating through a turbulent medium is disclosed. It includes an optical transmitter and an optical receiver. The optical receiver receives an optical signal containing information that fluctuates as it passes through a turbu... | 07/27/2004 |
| 6344846 | Optical retroreflective remote control An optical retroreflective remote control used in combination with electronic apparatus, such as a VCR or television set is disclosed. The controlled apparatus includes a light or radiation source and a retroreflected light detector as well as means for d... | 02/05/2002 |
| 6342119 | Manufacturing method of a compound substrate for light-reflective application A manufacturing method of a compound substrate for light-reflective application is proposed, by which the mechanical utility can be simplified, the cost is reduced and the light-reflective article made by the compound substrate has uniform light-reflectin... | 01/29/2002 |
| 6317237 | Voice monitoring system using laser beam An infrared laser beam (B1) is irradiated from a transmitter (100) toward a window pane (410) of a building (400), and a reflected laser beam (B2) is received by a receiver (200). A laser spot (Q) picked up by a CCD camera is displayed on respective targe... | 11/13/2001 |
| 6154299 | Modulating retroreflector using multiple quantum well technology A system for remote optical communications includes a base station and a remote station. The remote station includes a retroreflector, a multiple quantum well modulator (MQW), and drive circuitry that drives the MQW. A base station transmitter sends an in... | 11/28/2000 |
