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| Number | Title | Issue Date |
| 8189176 | Velocity detector A method of detecting the velocity of a moving object comprising the steps of: passing a beam of coherent light through an optical mask having a pattern of alternating opaque and non-opaque regions formed thereon, whereby an image of alternating light and dark fring... | 05/29/2012 |
| 8169599 | Device and method for measuring parts A device and method for measuring moving material includes a processor and operating software associated therewith; a light source for emitting at least two polarized light beams in a manner wherein the beams cross thereby creating an interference region and generat... | 05/01/2012 |
| 8072584 | Optical air data systems and methods Systems and methods for sensing air includes at least one, and in some embodiments three, transceivers for projecting the laser energy as laser radiation to the air. The transceivers are scanned or aligned along several different axes. Each transceiver receives lase... | 12/06/2011 |
| 8068216 | Optical air data systems and methods A method for remotely sensing air outside a moving aircraft includes generating laser radiation within a swept frequency range. A portion of the laser radiation is projected from the aircraft into the air to induce scattered laser radiation. Filtered scattered laser... | 11/29/2011 |
| 8028343 | Scanning probe microscope with independent force control and displacement measurements A nanoindenter that includes an interferometer, a rod, a force actuator and a controller is disclosed. The interferometer generates a light beam that is reflected from a moveable reflector, the interferometer determining a distance between a reference location and t... | 09/27/2011 |
| 7986398 | Gas velocity sensor A method and apparatus for determining gas velocity, which includes generating transmitted radiation having an expected transmission frequency, detecting backscattered radiation, and determining gas velocity in dependence upon any Doppler shift of the frequency of t... | 07/26/2011 |
| 7982863 | Biaxial laser anemometry probe The subject of the present invention is a laser anemometry probe for optical homodyne detection of frequency offset by Doppler effect, comprising two devices (DERF1, DERF2) for transmitting/receiving beams in two different directions, avoiding duplicat... | 07/19/2011 |
| 7978316 | Multi-phase interferometer An optical perturbation sensing system includes a probing beam incident on a medium with perturbations and a sensing beam redirected from the medium and incident on a surface area of a photodetector. A reference beam directed onto the photodetector surface forms, wi... | 07/12/2011 |
| 7961302 | Physical quantity sensor and physical quantity measuring method A physical quantity sensor has a semiconductor laser, a laser driver for providing, to the semiconductor laser, a driving electric current that is a waveform wherein the maximum portions and minimum portions of a triangle wave have been rounded; detecting means (a p... | 06/14/2011 |
| 7933003 | Method and apparatus for studying surface vibrations by moving speckle interferometer A method of studying a surface using an interferometer, in which there is relative motion between the surface and the interferometer, the motion having a total velocity Vtot which includes a transversal or traversing component Vt and a longitud... | 04/26/2011 |
| 7911593 | Range finder/velocimeter and range-finding/velocimetry method A laser driver (4) causes a semiconductor laser (1) to operate such that a first oscillation period of monotonically increasing the oscillation wavelength and a second oscillation period of monotonically decreasing the oscillation wavelength alternatel... | 03/22/2011 |
| 7894045 | Optical air data systems and methods A method for remotely sensing air outside a moving aircraft includes generating laser radiation within a swept frequency range. A portion of the laser radiation is projected from the aircraft into the air to induce scattered laser radiation. Filtered scattered laser... | 02/22/2011 |
| 7894046 | Two-dimensional estimation technique for doppler optical coherence tomography (OCT) Optical Coherence Tomography (OCT) is a high-resolution, non-invasive technique to image subsurface tissue and tissue functions. A broadband light source illuminates an object and the reflected photons are processed using an interferometer, demodulated into inphase ... | 02/22/2011 |
| 7847924 | Performance of an atom interferometric device through complementary filtering A technique is disclosed which offers an improvement in the performance of an atom interferometric (AI) sensor, such as one that is used in an accelerometer or a gyroscope. The improvement is based on the recognition that the AI-based device, which is associated wit... | 12/07/2010 |
| 7808618 | Methods and apparatus for providing a semiconductor optical flexured mass accelerometer Methods and apparatus are provided for integrating various optical components onto a planar substrate using a single semiconductor material system to produce an accelerometer. A light beam is generated on the semiconductor optical accelerometer. The light beam is sp... | 10/05/2010 |
| 7787107 | Motion measurement and synchronization using a scanning interferometer with gratings Indicating relative speed is disclosed. A first grating coupled to a first moving object is illuminated using a coherent light source to generate a first diffracted beam and a diffracted order beam. A second grating coupled to a second moving object is illuminated u... | 08/31/2010 |
| 7777866 | Fixed difference, dual beam laser Doppler velocimetry A method and apparatus for laser Doppler velocity measurements with a fixed difference, dual beam receiver and using a non-laser, stable frequency reference. ... | 08/17/2010 |
| 7760339 | Optical air data systems and methods Systems and methods for sensing air outside a moving aircraft are presented. In one embodiment, a system includes a laser for generating laser energy. The system also includes one or more transceivers for projecting the laser energy as laser radiation to the air. Su... | 07/20/2010 |
| 7755745 | Coherent doppler lidar A coherent Doppler lidar which can oscillate high energy pulses and output laser beams in a longer wavelength range of 1.5 μm to the atmosphere is provided. The coherent Doppler lidar has a pulse laser an oscillation wavelength of which is controlled by means of in... | 07/13/2010 |
| 7719663 | Heterodyne laser doppler probe and measurement system using the same A heterodyne laser having a first optical path for guiding excitation light and a second optical path for guiding measurement light. The heterodyne laser includes an optical probe body for optically coupling and structurally combining the first optical path and the ... | 05/18/2010 |
| 7705972 | Doppler sensor for the derivation of torsional slip, friction and related parameters An optical method and apparatus are described for the measurement of properties of a travel vehicle or a travel surface upon which the travel vehicle travels, which includes providing an incident light from a light source to the travel surface, collecting light refl... | 04/27/2010 |
| 7692773 | Light emitting diode based measurement systems Various light emitting diode (LED) based measurement systems and methods are provided. One system includes one or more arrays of LEDs arranged along a flow path of a sample. The array(s) are configured to illuminate the sample as the sample moves along the flow path... | 04/06/2010 |
| 7679729 | Light wave radar apparatus A light wave radar apparatus includes a frequency deviation detecting unit 12 for detecting a frequency deviation fchirp of a light signal, and a weighted average processing unit 13 for determining a systematic error ΔVoffset fro... | 03/16/2010 |
| 7667826 | System and method for motion based velocity discrimination for doppler velocimeters A Doppler velocimeter apparatus and method of forming same. In one implementation a coherent light source is used for generating a beam of coherent light. An optical fiber receives the beam of coherent light. The optical fiber has an output face that is generally fl... | 02/23/2010 |
| 7659967 | Translational optical flow sensor An optical flow sensor is presented that directly measures the translational component of the optical flow experienced by the sensor while it is on a moving platform. The translational optical flow is measured by using a gyro to measure the platform's angular rates ... | 02/09/2010 |
| 7586587 | Stand-alone speedometer using two spaced laser beams A stand-alone speedometer directly measuring the translational speed of a moving body comprises a source emitting two spaced light beams which interfere each other, mirrors or beam splitters changing directions of propagation of light beams, and a detector measuring... | 09/08/2009 |
| 7576839 | Range and velocity sensing system The present invention relates to a method and apparatus used to calculate at least one velocity component for a target within the region. The invention employs an energy source which is activated using an activation system in a cyclic pattern with a selected source ... | 08/18/2009 |
| 7564539 | Optical air data systems and methods A method for remotely sensing air outside a moving aircraft includes generating laser radiation within a swept frequency range. A portion of the laser radiation is projected from the aircraft into the air to induce scattered laser radiation. Filtered scattered laser... | 07/21/2009 |
| 7466399 | Fiber optic flow sensing device and method The invention provides an optical flow meter for measuring fluid flow through a pipe which obviates the need for the flow to be seeded with foreign particles. The meter comprises a fiber optic Sagnac interferometer with optical path crossing the flowing fluid. The i... | 12/16/2008 |
| 7463341 | Method and apparatus for detecting wind velocities by means of a doppler-lidar system In the case of a method of detecting wind velocities by means of a Doppler-lidar system (10), a laser beam of a defined frequency generated by means of a laser (11) is emitted by a transmitting device (12) toward a space area and the light backs... | 12/09/2008 |
| 7450222 | Correlated-intensity velocimeter for arbitrary reflector A velocimetry apparatus and method comprising splitting incoming reflected laser light and directing the laser light into first and second arms, filtering the laser light with passband filters in the first and second arms, one having a positive passband slope and th... | 11/11/2008 |
| 7423736 | Low-cost doppler frequency shift measuring device The invention relates to a Doppler frequency shift measuring device of the optical type comprising an optical signal channel delivering, through a polarization-splitting coupler, through a bidirectional signal port of the coupler, a signal light beam illuminating a ... | 09/09/2008 |
| 7414708 | Interferometric Rayleigh scattering measurement system A method and apparatus for performing simultaneous multi-point measurements of multiple velocity components in a gas flow is described. Pulses of laser light are directed to a measurement region of unseeded gas to produce Rayleigh or Mie scattered light in a plurali... | 08/19/2008 |
| 7414759 | Scanner linearity tester Linear spot velocity or position variations are measured in a scanning system by a process and apparatus. The process comprises providing at least two radiation detectors that can move in tandem across a scan line, the two radiation detectors being spaced apart by a... | 08/19/2008 |
| 7405814 | Frequency multiplexed, multiple channel heterodyne interferometer A novel technique using an acousto-optic modulator (AOM) as part of a heterodyne interferometer which measures optical path differences between a test signal and a reference signal is disclosed. An array of distinct frequencies are used to drive the AOM, yielding a ... | 07/29/2008 |
| 7400386 | Combined laser altimeter and ground velocity measurement apparatus Combined laser-based apparatus for determining both altitude and ground velocity of an aircraft comprises: a laser source for emitting pulsed laser beams substantially at a predetermined wavelength; a plurality of first optical elements for directing the laser beams... | 07/15/2008 |
| 7391506 | Laser radar device and method A coherent laser radar or lidar device (2;20;84;90) for measuring wind speed is described that comprises a transmitter for transmitting a beam of light to a remote probe volume (6;54), a receiver for detecting back-scattered light and an analyzer for c... | 06/24/2008 |
| 7389197 | Device for producing microwave signals A device for generating microwave signals, e.g., for use in a distance and speed sensor in a motor vehicle, is provided. To this end, two laser sources are operated, whose emitted radiations are distinguished from each other by a set difference in wavelength. The tw... | 06/17/2008 |
| 7379166 | Combined laser altimeter and ground velocity measurement apparatus and a fiber optic filter edge detector of doppler shifts for use therein A fiber optic filter edge detector of Doppler shifted light comprises: a laser source for emitting pulsed laser light substantially over a first fiber optic path; an optical lens for directing laser light emitted from the first fiber optic path to free-space and for... | 05/27/2008 |
| 7366420 | Optical transmission device An optical transmission device for providing stable communication with a partner device by reducing errors in optical axis misalignment. Such errors are caused by uneven distribution of the light intensity in a received light beam resulting from atmospheric microsco... | 04/29/2008 |
