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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...
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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...
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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...
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7362421 |
Analysis of signal oscillation patterns
A method for identifying and determining the frequency of scattered radiation fringe patterns for applications such as particle or droplet sizing and laser Doppler velocimetery. The method utilizes...
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7352447 |
Active optical measurement device with weak signal amplification
The invention relates to an optical measurement device designed notably to evaluate the velocity of an aircraft by detection of a Doppler shift. The device for measurement by optical probe...
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7342651 |
Time modulated doublet coherent laser radar
The time separation of laser pulses comprised of a relatively fixed reference pulse and a time varying doublet pulse in a doublet pulse laser radar is linearly modulated for eliminating velocity...
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7336368 |
Optical detecting module and optical detector thereof
An optical detector measuring a movement of an object in a space on a measurement axis comprises a light source, a reflective portion, a detection unit and a converting unit. The light source...
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7333210 |
Method and apparatus for feedback control of tunable laser wavelength
A method and system for controlling the wavelength of light emitted by a tunable laser. The system includes a wavelength tuner that provides information of a desired wavelength; a coupler for...
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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...
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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...
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7317538 |
Optical two-dimensional velocity and/or movement detector
In an optical movement information detector, light emitted from a laser diode ( 1 ) is split into a first beam ( 10 ), a second beam ( 11 ) and a third beam ( 12 ) by beam splitters ( 2 a, 2 b )....
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7312916 |
Electrophoretic media containing specularly reflective particles
An electrophoretic medium ( 100 ) comprises at least one type of particle ( 108 ) suspended in a suspending fluid ( 106 ) and capable of moving therethrough on application of an electric field to...
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7307701 |
Method and apparatus for detecting a moving projectile
An apparatus includes a transmitter portion which transmits a defined beam of eyesafe laser energy, a receiver portion which receives reflected energy from the beam, and a further portion which...
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7301610 |
Gas velocity sensor
This invention relates to a gas velocity sensor such as an air velocity sensor for use on an aircraft such that the velocity of the aircraft can be determined. There is provided a gas velocity...
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7301609 |
Measuring sonde for a hydrocarbon well
The invention provides a measuring sonde ( 1 ) for a hydrocarbon well, the sonde comprising a main body ( 2 ), a downstream arm ( 3 ), and an upstream arm ( 5 ), at least one of said arms being...
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7295321 |
VISAR interferometer with field elements
The present invention includes an interferometer for VISAR. Optionally, the present VISAR system includes intracavity imaging design with converging beams and field elements to, among other...
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7292318 |
System and method for generating thrust at remote objects
A system and method for detecting thrust in a remote object is disclosed herein. The system is suitable for use in connection with midcourse discrimination systems that distinguish actual targets...
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7274439 |
Precise, no-contact, position sensing using imaging
A contact free optical motion sensor for an inertial reference system. One or more image acquisition systems are adapted to produce a series of overlapping images of a gas bearing supported...
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7269537 |
Infrasound sensor with disturbance filtering
The invention pertains to the sensing and measurement of infrasound (pressure variations with frequency content under 10 Hertz). The invention measures the infrasound pressure variations and then...
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7268859 |
Liquid measuring system
Systems and methods for measuring the flow of a liquid along a conduit are disclosed. A heat source applies thermal energy to a portion of a liquid flowing along a conduit thereby elevating its...
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7265843 |
Optical detector device for a counter
An optical detector device for a counter, comprising a consumption indicator, formed from a rotating disc ( 4 ) with a section called active ( 4 A) and optical elements of the receiver and emitter...
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7245385 |
Characterizing unsteady pressures in pipes using optical measurement devices
An apparatus for measuring at least one parameter associated with a fluid flowing within a pipe comprises an optical measurement device and a signal processor. The optical measurement device...
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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...
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7227621 |
System for visualizing flow and measuring velocity field using X-ray particle image velocimetry
A system for measuring flow information of a fluid, the system includes a light emission control unit for passing an X-ray through a specimen only at desired moments; a scintillator installed on an...
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7224445 |
Vehicle external recognition system and related method
A vehicle external recognition system is provided with: a relative position detecting section detecting an object ahead of a vehicle as a detected object to detect a relative position relationship...
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7221438 |
Coherent laser radar apparatus
A coherent laser radar device is described which comprises a laser source ( 11 ), and two or more transceivers ( 84 ) are optically connected to the laser source by optical fiber cables ( 42, 48,...
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7209238 |
Interferometer arrangement and interferometric measuring method
The invention relates to an interferometer arrangement ( 1000 ) having at least one measuring beam path for providing light in an object area, at least one reference beam path and at least one unit...
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7209222 |
Laser radar apparatus
A laser radar apparatus includes a mixer 12 for converting the frequency of an electric signal outputted from a photodetector 11 into a baseband frequency by using a modulating signal generated...
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7206064 |
Laser doppler velocimeter
A laser Doppler velocimeter is formed using erbium-doped fiber as the lasing medium. The fiber is diode-pumped. By properly modulating the lasing in the fiber, pulses of radiation may be generated....
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7202942 |
System and method for measuring velocity using frequency modulation of laser output
A system for measuring velocity of a target is disclosed. In one embodiment, the system includes a laser device, a detector and a signal processor. The laser device produces a frequency-modulated...
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7196780 |
Velocimeter, displacement meter, vibrometer and electronic device
A first luminous flux emitted from the front end face of a LD is reflected by a mirror to be made incident on a detection point on the surface of a measuring object, and a second luminous flux...
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7180581 |
Lithography for optical patterning of fluids
An illuminator (e.g., laser) produces a light beam that partially passes through, and is partially blocked by, a mask contrastingly patterned via non-transparent and transparent portions. The...
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7126694 |
Compact apparatus providing multi-dimensional characterization of spherical objects using coherent light
A compact computer-controlled fully-packaged apparatus providing reliable multi-dimensional characterization of spherical objects in a field environment is disclosed. The apparatus has a rugged,...
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7113447 |
Laser pumped compact acoustic sensor system
An acoustic transducer system for acoustic signals in water has at least one hollow spherically-shaped shell for vibrating in response to acoustic signals impinging from the water. The hollow...
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7106447 |
Molecular optical air data systems (MOADS)
A first beam of light from a laser is split by a beam splitter into a reference beam and at least one second beam of light, the latter of which is directed from an optical head into an atmosphere....
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7079260 |
Optical profile determining apparatus and associated methods including the use of a plurality of wavelengths in the reference beam and a plurality of wavelengths in a reflective transit beam
An optical profile determining apparatus includes an optical detector and an optical source. The optical source generates a transmit beam including a plurality of wavelengths, and generates a...
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7079228 |
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...
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7049578 |
Optical movement information detector, movement information detection system, electronic equipment and encoder
Two different phase components obtained by splitting interference light of light from an object by a diffraction grating are guided to first and second PD's by a second optical system. A first...
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6938611 |
Flow meter
The flow meter is a device having a laser Doppler anemometer (LDA) which measures the instantaneous center line velocity of fluid flow in a pipe and processes the instantaneous velocity so obtained...
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6906792 |
Methods of calibrating an imaging system using calibration beads
When utilized in a flow imaging instrument, calibration beads provide a known data source that can be employed in various self-diagnostic, calibration and quality metric applications for the both...
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6865196 |
Laser spectroscopy using a master/slave architecture
A system for tuning one or more second radiant sources relative to a first radiant source may include a coupler configured to combine output signals from the first radiant source and a second...
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6860350 |
CMOS camera with integral laser ranging and velocity measurement
The invention provides a method and system for adjusting vehicle speed, beginning with a modulated laser pulse being emitted. A reference portion of the emitted modulated laser pulse is extracted,...
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6859267 |
Laser doppler anemometry with diffractive optical elements
The present invention relates to an apparatus for use in the determination of a condition or state of an object based on quasi-elastic interaction between the object and light transmitted to the...
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6856396 |
Wind shear detection system
An Airborne Windshear Detection System measures wind during the Take off and Landing phase by determining the Doppler Shift of backscattered radiation that is transmitted by an on-board laser...
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6850325 |
Temperature compensated optical system based on a diffractive optical element
The present invention relates to an apparatus for the determination of a condition or state of an object based on quasi-elastic interaction between the object and light transmitted to the object,...
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6847437 |
Laser anemometer
The present invention relates to a laser anemometer making it possible to determine the relative velocity between the anemometer and an ambient medium. The architecture of the anemometer includes a...
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6833910 |
Laser transponder
A laser transponder for disabling a laser-based speed monitor which is transmitting a monitor laser beam at a moving vehicle by transmitting a jamming laser beam to the laser-based speed monitor....
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6827247 |
Apparatus for detecting the oscillation amplitude of an oscillating object
Apparatus for detecting the oscillation amplitude of an oscillating object ( 3 ) includes an optical radiation source ( 9 ) and a detector ( 10 ) including first and second optical radiation...
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6823833 |
Swirl injector for internal combustion engine
The swirl injector for an internal combustion engine is an electronic fuel injector for a direct injection engine, either gasoline or diesel. The injector has a housing defining a fluid channel, a...
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6813006 |
Stand-alone speedometer directly measuring the translational speed based on the difference between dispersive dragging effects of different media
A stand-alone speedometer includes an electromagnetic wave source, a beam splitter, a detector and two media with different dispersive dragging effects. An electromagnetic wave is divided into two...
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