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| Number | Title | Issue Date |
| 8035818 | Solid-state laser gyro optically active through alternating bias The field of the invention is that of solid-state laser gyros used for the measurements of rotation speed or relative angular positions. This type of equipment is notably used for aeronautical applications. The object of the invention is to complete the optical devi... | 10/11/2011 |
| 7804600 | Ring-laser gyroscope system using dispersive element(s) A ring-laser gyroscope system includes a ring-laser gyroscope (RLG) and at least one dispersive element optically coupled to the RLG's ring-shaped optical path. Each dispersive element has a resonant frequency that is approximately equal to the RLG's lasing frequenc... | 09/28/2010 |
| 7710575 | Solid-state laser gyro having orthogonal counterpropagating modes The field of the invention is that of solid-state laser gyros used in inertial control units. However, there are certain technical difficulties in producing laser gyros of this type that are due partly to the fact that the counterpropagating waves interfere with eac... | 05/04/2010 |
| 7701584 | Light path circuit apparatus and ring laser gyro A light path circuit apparatus suited for a small sized ring laser gyro, includes a base having a standard plane, one or more substrates laminated parallel against the standard plane in a direction orthogonal to the standard plane, a light source, wherein on the bas... | 04/20/2010 |
| 7589841 | Solid-state laser gyro with a mechanically activated gain medium The field of the invention is that of solid-state ring lasers or laser gyros. The laser gyro according to the invention comprises at least one optical cavity in the form of a ring and a solid-state amplifying medium which are designed so that two counterpropagating ... | 09/15/2009 |
| 7561275 | Scale-factor stabilized solid-state laser gyroscope A laser cavity optical architecture of a solid-state laser gyro measures rotational velocity or angular position and is based on a global conservation of the scale factor so that each parameter varies with temperature and avoids optical mode hops. ... | 07/14/2009 |
| 7538882 | Systems and methods for assisting start of electrodeless RF discharge in a ring laser gyro Systems and methods for starting and operating an electrodeless RF discharge ring laser gyro. In one example, an electrodeless RF discharge ring laser gyro system includes a ring laser gyro, a starting circuit, an RF power source, and a controller. The starting circ... | 05/26/2009 |
| 7535575 | Plasma shunting apparatus and method for ring laser gyroscope A ring laser gyroscope includes a first plasma shunt arranged to prevent the plasma from contacting a first mirror in the gain region and a second plasma shunt arranged to prevent the plasma from contacting a second mirror in the gain region. The first and second pl... | 05/19/2009 |
| 7535574 | Baseplate for a ring laser gyroscope A path length control driver for a ring laser gyroscope includes a baseplate, a number of piezoelectric elements, and electrodes. The baseplate includes openings selectively sized and located on the baseplate for reducing distortion thereof during thermal or other m... | 05/19/2009 |
| 7474406 | Stabilized solid-state laser gyro and anisotropic lasing medium The field of the invention is that of solid-state laser gyros. One of the major inherent problems in this technology is that the optical emission of this type of laser is by nature highly unstable in terms of power. To reduce this instability, the invention proposes... | 01/06/2009 |
| 7446879 | Solid-state gyrolaser stabilised by acousto-optic devices The field of the invention is that of solid-state laser gyros. One of the major problems inherent in this technology is that the optical cavity of this type of laser gyro is by nature highly unstable. To reduce this instability, controlled optical are introduced int... | 11/04/2008 |
| 7397567 | Balanced optical-radiofrequency phase detector A balanced optical-RF phase detector for the extraction of low-jitter radiofrequency (RF) signals from optical pulse trains is demonstrated. The extraction of the low-jitter radiofrequency signals is based on the precise phase detection by use of a differentially bi... | 07/08/2008 |
| 7388670 | LASER gyro readout signal stabilization in high vibration environments A method of stabilizing beam power in a ring LASER gyroscope (RKG) during high vibration is provided. The method comprises modifying an electrical signal output from an RLG photodetector to generate a direct current (DC) feedback signal, the DC levels of the feedbac... | 06/17/2008 |
| 7385177 | Light guide rotation rate detector with coupled optical resonators A method and device are presented for use in determining a rate of rotation of an object. The device comprises a light guide comprising an arrangement of a plurality of coupled optical resonators arranged along a curvilinear optical path. This allows for determining... | 06/10/2008 |
| 7369902 | Slave units and network system as well as slave unit processing method and device information collecting method A network system is constructed by connecting a safety PLC constituting a master unit and safety slaves 2 to each other through a safety network 3. The safety slaves each have a device information storage unit 25 for storing individual informati... | 05/06/2008 |
| 7359059 | Chip scale atomic gyroscope A chip-scale atomic gyroscope and methods for sensing and measuring mechanical rotation of an object are disclosed. The chip-scale atomic gyroscope can include a vapor cell including a vapor cavity adapted to contain a vaporized source of alkali-metal atoms and nobl... | 04/15/2008 |
| 7352109 | Flat type piezoelectric ultrasonic motor There is provided a flat type piezoelectric ultrasonic motor for generating a rotation force to a rotor by ultrasonic vibrations. In the piezoelectric ultrasonic motor, a vibrator is formed of elastic material at a given size, a plurality of piezoelectric plates are... | 04/01/2008 |
| 7347008 | System and method for controlling the operating parameters of a setting system A system includes a device for setting a material, such as ink, deposited on a textile or graphic. A programmable logic controller includes a power intensity selector and an application module and is operably connected to the device. The application module is capabl... | 03/25/2008 |
| 7337668 | Accelerometer in closed loop with error detection An accelerometric measurement device with a return loop including accelerometer, a corrector generating a signal for correction of the position of the accelerometer, a closed return loop to apply this correction signal to the accelerometer, a detector to detect an e... | 03/04/2008 |
| 7333691 | Low loss tunable ring resonator allpass filter An apparatus, including an optical ring resonator having a waveguide ring with substantially straight waveguide segments and bent waveguide segments. The bent waveguide segments are optically coupled to the substantially straight waveguide segments and have optical ... | 02/19/2008 |
| 7330269 | Single sensor ring laser gyroscope A ring laser gyroscope is described which includes a laser cavity configured to provide an optical laser path for a pair of counter-propagating laser beams, an optical sensor configured to receive a portion of the energy from the counter-propagating laser beams, and... | 02/12/2008 |
| 7324205 | Optical accelerometer, gravitometer, and gradiometer An optical accelerometer, gravitometer, and gradiometer have a light source, a beam splitter, a light medium, and a plurality of mirrors. The light beam from the light source is split into two beams that counter-propagate through the accelerometer. The acceleration ... | 01/29/2008 |
| 7319513 | Stabilized solid state gyrolaser without blind region The invention concerns solid-state gyrolasers used to measure rotation speeds or relative angular positions. This type of equipment is used, in particular, in aeronautical applications. The purpose of the invention is to complete the optic devices required to... | 01/15/2008 |
| 7317537 | System and method for recovering lost data in a gyroscope sensor system A system and method for recovering lost data in an electronic gyroscope sensor system are disclosed, which use a linear adaptive predictive technique for determining what data was lost by the gyroscope sensor system during a disruptive interval involved. More precis... | 01/08/2008 |
| 7286236 | Detecting radiation events in a ring laser gyroscope A system for detecting radiation events in a ring laser gyro is provided. The system includes one or more photodetectors, that produce photocurrent signals to monitor the ring laser gyro. Further, the system includes one or more comparator circuits actuating at one ... | 10/23/2007 |
| 7280218 | Apparatus and method to facilitate laser gyroscope ionization An apparatus and method is provided for facilitating ionization of a gas medium of a laser gyroscope. The apparatus and method employ a solid state light emitting device as a start aid for the laser gyroscope. The solid state light emitting device has a wavelength a... | 10/09/2007 |
| 7230686 | Four-mode stabilized solid-state gyrolaser without blind region The invention concerns solid-state gyrolasers used to measure rotation speeds or relative angular positions. This type of equipment is used, in particular, in aeronautical applications. The purpose of the invention is to complete the optic devices required to... | 06/12/2007 |
| 7190462 | Fiber optic gyroscope having optical integrated circuit, depolarizer and fiber optic coil A light source 10 is connected sequentially through a single mode optical fiber and a coupler to one end of a polarization maintaining optical fiber, the other end of which is connected to an optical waveguide of an optical integrated circuit having a branchi... | 03/13/2007 |
| 7173712 | Method and device for increasing the long-term operational reliability of a fiber optic interferometer A method for increasing the long-term operational reliability of a fiber optic interferometer. Noise in a detector output signal is set to a desired value by correcting the detector light power. Detector light power is corrected by varying a light source current of ... | 02/06/2007 |
| 7142952 | Method and apparatus for pavement cross-slope measurement Pavement cross-slope is measured at highway speeds by mounting a ring-laser gyroscope on a vehicle and measuring deviation of the transverse slope of the vehicle. Precise laser distance measuring devices are mounted transversely with respect to the vehicle at signif... | 11/28/2006 |
| 7104133 | Torsional vibration measuring instrument A torsional vibration measuring instrument has a plurality of reflecting means (6, 7) arranged with stipulated intervals along surface of a rotator (5) of which torsional vibration is to be measured; a pulse light irradiating means (1, 2) for ir... | 09/12/2006 |
| 7058111 | Arrangements for increasing sputter life in gas discharge tubes A gas discharge tube, such as a ring laser gyroscope, includes a block, a cathode, and an anode. At least a portion of the block is maintained at a reference potential. The cathode may be biased at a higher potential than the reference potential, and the anode may b... | 06/06/2006 |
| 7038776 | Polarimeter to simultaneously measure the stokes vector components of light A polarimeter simultaneously measures the Stokes vectors of a light beam using an optics unit with a slit with a slit axis, a foreoptics that focuses the light beam from the point location through the slit, a collimator that receives the light beam from the slit and... | 05/02/2006 |
| 7038783 | Eigen frequency detector for Sagnac interferometers A system for detecting the eigen frequency of a sensing coil in a fiber optic gyro (FOG) that includes a fiber coupler connected to the light source, an integrated optics chip (IOC) capable of modulating light received from the light source via the fiber coupler, a ... | 05/02/2006 |
| 7030370 | Microchip ring trap for cold atoms or molecules A microchip ring trap for cold atoms or neutral molecules consists of a particular multi-layer layout of wires on a microchip. These conductive wires may be produced by photolithography on a substrate (e.g. gold on sapphire). There are four wires crucial to the desi... | 04/18/2006 |
| 7023892 | Semiconductor laser based on matrix, array or single triangle optical cavity with spatially distributed current injection The invention provides a method and device for light generation wherein the device comprises a lower electrode, a substrate formed on the lower electrode, a triangle mesa structure formed on the substrate for lateral confinement of light, a triangle optical cavity f... | 04/04/2006 |
| 7023534 | Optical modulating apparatus having bias controller and bias control method Disclosed are an optical modulating apparatus having a bias controller and a bias control method using the same, which can automatically perform a bias adjust so as to keep the optical output characteristic of an optical modulator constant. The optical modulating ap... | 04/04/2006 |
| 6992818 | Self-adjusting interferometric outcoupler and method A self-adjusting interferometric outcoupler. In the most general sense, the invention is an optical system (100) comprising a first mechanism (112) for generating a first beam, a second mechanism (122) for receiving the first beam and returning ... | 01/31/2006 |
| 6952268 | Magnetic shield for a fiber optic gyroscope A magnetic shielding system for a fiber optic gyroscope is disclosed. The fiber optic gyroscope may have a sensing coil with a sensing axis. An exemplary magnetic shield may enclose the sensing coil and have a layer including a plurality of pieces connected at a sea... | 10/04/2005 |
| 6937342 | Monolithically integrated semiconductor unidirectional ring laser rotation sensor/gyroscope A monolithically integrated semiconductor laser rotation sensor/gyroscope that includes at least two isolated, nonsynchronized semiconductor lasers; at least one being unidirectional and at least a further one being either a straight-line laser or a second unidirect... | 08/30/2005 |
