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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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6765655 |
Data aquisition system and method for a laser doppler anemometer
The present invention provides a system and method for collecting data from a Laser Doppler Anemometer of the type including a probe mounted to a controllable traversing system. Velocity and...
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6762827 |
Planar light sheet probes
An optical endoscopic fluid flow measurement probe assembly is disclosed having a user end and a distal end. The distal end having a light sheet generator and at least one reflected light acquirer,...
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6728645 |
Method and system for automatic identification of objects type according to their characteristic spectrum of vibration frequencies
A method and system for automatic recognition and classification of a vibrating target among members of a plurality of objects having their vibration spectra stored in a database. In deciding as to...
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6710860 |
Method of aligning a bistatic dopple sensor apparatus
Doppler sensor apparatus has means outputting coherent electromagnetic radiation ( 2 ), means ( 4 ) for transmitting radiation from the source means ( 2 ) to a point in space, means ( 6 ) for...
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6707027 |
Method of measuring the movement of an input device
An optical input device for an apparatus generates input signals by moving the device and an object ( 15 ) relative to each other and measures the movement by the effects of self-mixing in a diode...
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6697148 |
Optical radar with range and doppler measurement capability
A laser radar system is disclosed. The laser radar system includes a transmitting means that transmits a signal. The transmitted signal is formed by an optical signal that is amplitude modulated...
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6683679 |
Optical flow monitor
An optical flow monitor. Fluid flow is determined by correlating two interference signals produced by coherent laser beams passing through a flowing fluid at two spaced-apart paths. The distance...
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6665063 |
Distributed laser obstacle awareness system
A distributed laser based obstacle awareness system for use on-board an aircraft comprises: a plurality of obstacle detecting sensors disposable at a corresponding plurality of locations of the...
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6654102 |
Miniature optical sensor
A miniature laser Doppler probe includes a laser, lens, another lens with a diffraction grating etched thereon, and a focusing lens. The focusing lens focuses the diffraction grating on an...
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6636577 |
Laser induced fluorescence water measurement system for nuclear reactors
A water monitoring system for a nuclear reactor is provided. In an exemplary embodiment, the water monitoring system includes a fiber optic cable having a first end and a second end, with the first...
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6634600 |
Satellite constellation for measuring atmospheric wind speeds using doppler lidar
A constellation of satellites comprising at least two satellites in the same orbit is used to measure atmospheric wind speeds by means of a spatial wind lidar; each satellite carries a Doppler...
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6621561 |
Doppler rotational velocity sensor
The disclosed invention concept utilizes a homodyne/heterodyne interferometer technique in a modified lidar in such a manner as to sense the rotational velocity magnitude and sense of a rotating...
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6618128 |
Optical speed sensing system
An apparatus for determining the rotational speed of an object returning diffuse reflections where no reflective singularity exists on the object or no clearly distinct light pulse is produced. A...
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6608668 |
Sub miniaturized laser doppler velocimeter sensor
A miniaturized laser Doppler velocimeter is formed in a housing that is preferably 3 mm in diameter or less. A laser couples light to a first diffractive optical element that is formed on the fiber...
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6608669 |
Quadrature processed LIDAR system
A method of generating in-quadrature signals is disclosed. The method comprises phase shifting a Doppler frequency-shifted signal; phase shifting a local oscillator signal; mixing the phase shifted...
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6603536 |
Hybrid optical correlator/digital processor for target detection and discrimination
An optical correlator is used to detect the presence of a target in a laser detection and ranging (LADAR) system by analyzing the return signal, and to provide initial estimates of the targets...
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6598478 |
Micro-doppler microscope
A micro-doppler microscope for providing an indication of the vibration of a target. An input laser beam is received by a beamsplitter that divides the input laser beam into a transmitted portion...
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6586748 |
Non-invasive water current measurement system and method
A method and system are provided for measuring water current direction and magnitude. A plurality of beams of radiation are transmitted radially outward from a location above a body of water. Each...
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6580497 |
Coherent laser radar apparatus and radar/optical communication system
In a coherent CW laser radar apparatus, a soft target such as rain, fog, and air turbulence can be detected by using a CW laser. The coherent CW laser radar apparatus is arbandd by comprising: as...
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6573982 |
Method and arrangement for compensating for frequency jitter in a laser radar system by utilizing double-sideband chirped modulator/demodulator system
A frequency jitter compensation radar system which frequency modulates a transmitter laser beam with simultaneously generated up- and down-chirped frequency modulated signals. The frequency...
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6570647 |
Measuring method and measuring system
The invention relates to a method for the determination of physical properties of flows or currents using at least one sensor head, wherein fluctuations of a parameter are detected by at least...
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6559932 |
Synthetic aperture ladar system using incoherent laser pulses
An incoherent ladar transmitter ( 12 ) adapted for use with synthetic aperture processing. The system ( 12 ) includes a first mechanism ( 44, 48, 50 ) for generating a laser beam ( 18 ). A second...
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6559933 |
Method and apparatus for detecting a terrain-masked helicopter
A robot sentry with a scanning laser observes the sky just above the geographic skyline looking for a vertical airflow pattern characteristic of the rotor inflow to a helicopter rotor. The presence...
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6556282 |
Combined LOAS and LIDAR system
A combined system of a LOAS and a LIDAR system comprises: a LIDAR arrangement of optical elements for generating a first coherent beam of light at a first predetermined wavelength; a LOAS...
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