Matches 151 - 200 out of 451 < 1 2 3 4 5 6 7 8 9 10 >
Match Document Document Title
5910839 White light velocity interferometer  
The invention is a technique that allows the use of broadband and incoherent illumination. Although denoted white light velocimetry, this principle can be applied to any wave phenomenon. For the...
5900928 Confocal bidirectional laser doppler velocimetry  
An apparatus is provided for the measurement of the velocity of blood flowing within a blood vessel of an eye wherein the apparatus includes a light source for producing a source beam of light and...
5875024 Method of adjusting a laser doppler anemometer  
A method is provided for adjusting a laser doppler anemometer (1-5) having an emitting optic (3) which emits at least two laser beams (7, 8), and a receiving optic (4) for gathering light scattered...
5872621 Holographic transmission beam director  
The present invention applies to the art of wind sensing using lidar, and in particular to the art of detecting the speed of objects such as air-borne particles and molecules in the atmosphere in...
5872628 Noise pair velocity and range echo location system  
An echo-location method for microwaves, sound and light capable of using incoherent and arbitrary waveforms of wide bandwidth to measure velocity and range (and target size) simultaneously to high...
5867257 Battlefield personnel threat detection system and operating method therefor  
A battlefield personnel threat detection system for identifying and analyzing vibrations corresponding to an immutable characteristic of a target of interest includes a transmitter for producing a...
5859694 Optical velocimeter probe  
An optical velocimeter probe a device to illuminate a volume of measurement in which there may pass particles, and an optical detector to produce an electrical signal x(t) in response to the...
5847815 Monostatic lidar system  
This monostatic LIDAR system is a pulsed-radiation LIDAR system comprising, for the separation of the laser emitter beam from the laser echo backscattered by the photodetector of the receiver, an...
5847816 Fiber optic micro-doppler ladar system and operating method therefor  
A micro-doppler ladar system for identifying and analyzing a target of interest includes a transmitter and coherent receiver pair, each of which includes a fiber optic power amplifier, and a...
5847817 Method for extending range and sensitivity of a fiber optic micro-doppler ladar system and apparatus therefor  
A method for compensating a reference signal used in a coherent receiver of a micro-doppler sensor having a transmitter includes the steps for: (a) repeatedly measuring phase differences between a...
5835199 Fiber-based ladar transceiver for range/doppler imaging with frequency comb generator  
The present invention provides a laser radar (ladar) imaging system in which both the range of an object being imaged and the velocity of the object can be measured simultaneously and accurately...
5831720 Velocimeter, signal processing method, and driving system using the same  
A velocimeter includes a light source for irradiating light onto an object to be measured, a light-receiving element for receiving scattered light from the object and outputting a light-receiving...
5825465 Autodyne detection laser velocimeter  
Autodyne laser velocimeter comprising: a microlaser (10) capable of emitting respectively a first (40) and second (42) beam, pumping means (12) capable of supplying a pumping beam light to...
5815267 Displacement information measuring apparatus in which a light-receiving condition on a photodetector is adjustable  
An apparatus for measuring displacement information of a target object includes an illumination system, a photodetector, and an adjusting member. The illumination system causes a beam from a light...
5814732 Laser doppler speed measuring apparatus  
A laser Doppler speed measuring apparatus comprises a laser light source, a photodetector, an FM demodulator, and an integrated filter circuit. A selector switch is interposed between the FM...
5812250 Doppler velocimeter and various kinds of apparatuses for signal processing thereof  
A Doppler velocimeter determines a state of noise generation in a detection signal including a Doppler signal component based on comparison by a preceding/succeeding-signal comparator for comparing...
5796470 Frequency shifter and optical displacement measuring apparatus using the frequency shifter  
Disclosed is a frequency shifter for shifting a frequency of incident light beams. The frequency shifter has an electro-optic element for making incident the light beam whose frequency is to be...
5796471 Lidar atmospheric wind detector  
The present invention is a lidar for detecting characteristics of the atmosphere, and in particular for detecting the speed and direction of objects such as air-borne particles and molecules in the...
5793477 Laser speed monitor disabling system  
A disabling system for disabling a laser-based speed monitor of the type that transmits a monitor laser beam at a moving motor vehicle. The monitor laser beam transmitted by the speed monitor is...
5793476 Laser transponder and method for disabling laser speed monitors  
A laser transponder and method for disabling a laser-based speed monitor of the type that transmits a monitor laser beam at a moving motor vehicle. The monitor laser beam transmitted by the speed...
5781283 Process and arrangement for the measurement of physical values of light scattering moving particles by means of a laser doppler anemometer  
A process is provided for measuring physical values of light-scattering moving particles by means of laser Doppler anemometry and to a corresponding laser Doppler anemometer (LDA) with phase...
5774218 Laser Doppler velocimeter with electro-optical crystal  
An apparatus for detecting the displacement information of an object to be measured has a light source, an electro-optical crystal disposed at the incidence position of a light beam from the light...
5767954 Laser transponder for disabling a laser-based speed monitor  
A laser transponder for disabling a laser-based speed monitor of the type that transmits a monitor laser beam at a moving motor vehicle. In response to detecting the monitor laser beam, a warning...
5754282 Optical device detecting displacement information using a device for frequency-shifting an incident beam and a system for reducing beam diameter in an application direction  
An optical device, and an apparatus for detecting displacement information of an object using the optical device, include an electrooptical device for shifting a frequency of an incident beam by...
5751410 Method for measuring flow vectors in gas flows  
In the optical measurement of the flow vectors in gas flows, two substantially parallel light beams (11a, 11b) are focussed at separate focussing spots. The particles passing the focussing spots...
5751830 Method and apparatus for coherent imaging of infrared energy  
A coherent camera system performs ranging, spectroscopy, and thermal imaging. Local oscillator radiation is combined with target scene radiation to enable heterodyne detection by the coherent...
5748295 Method and apparatus for determining the range, direction and velocity of an object  
The present invention provides a range finding system which utilizes feedback to induce mode hopping in a standing wave generator and which determines the range, direction and velocity of an object...
5737070 Displacement information measuring apparatus  
An apparatus for measuring information about displacement of an object includes a light source having the wavelength of its emitted light beam varied by a temperature change, a diffraction grating...
5726743 Laser observation space instrument and a space vehicle including it  
A laser observation space instrument for the quantitative characterization by DOPPLER effect of movements within a fluid mass carried by a planet having a reference axis locally parallel to its...
5724125 Determination of wind velocity using a non-vertical LIDAR scan  
A system and method for determining wind velocity. The LIDAR 104 transmits a plurality of laser pulses. The paths of the laser pulses surround a center line (206) that does not coincide with a...
5703679 Transceiver head for longitudinal doppler speed indicator  
Transceiver head for a longitudinal Doppler speed indicator. Transceiver head for a longitudinal Doppler speed indicator with at least one pair of measuring axes. It comprises: a laser (1);...
5696578 Frequency tracking method and apparatus, and Doppler velocity meter using the same  
This invention has as its object to provide a frequency tracking method, a frequency control apparatus (tracking apparatus) using this method, and a Doppler velocity meter using the same, which...
5684572 Method for determining the velocity of a flow  
In a method for determing the velocity of a flow seeded with particles reflecting light, the particles located in a light sheet (4) are illuminated with monochromatic light (5). The doppler-shifted...
5682236 Remote measurement of near-surface physical properties using optically smart surfaces  
A method and apparatus for remotely measuring such physical properties as surface temperature and strain on or near the surface of an object such as an aerodynamic model utilizes a sensor...
5663783 Stage-drive controlling device, projection exposure apparatus including the same, and method of controlling the driving of a stage  
In a stage-drive controlling device used in a scanning projection exposure apparatus, a targeted speed Iwy is imparted to a speed control system for controlling the speed of a substrate stage, and...
5640239 Optical device and displacement information measurement apparatus using the same  
There is disclosed an optical device having an electrooptic crystal on which a light beam is to be incident, and electrodes for applying a predetermined voltage to the electrooptic crystal. The...
5621514 Random pulse burst range-resolved doppler laser radar  
An laser radar system employing transmitted random and pseudo random optical pulse trains and signal processing that provides unambiguous range and Doppler velocity data. The system comprises a...
5617199 Device, and associated method, for determining distances between moving objects  
A device, and an associated method, for determining separation distances separating motor vehicles travelling along a roadway. A separation distance separating the motor vehicles is calculated...
5615677 MRI tracking of cyclical motion by fourier integration of velocity  
A closed-form integration method is derived and analyzed for computing motion trajectories from velocity field data, in particular as measured by phase contrast cine (PC) MR imaging. By modeling...
5610704 Probe for measurement of velocity and density of vapor in vapor plume  
A probe which directs a light beam through a vapor plume in a first direction at a first angle ranging from greater than 0° to less than 90°, reflecting the light beam back through the vapor...
5610705 Doppler velocimeter  
A heterodyne velocimeter system includes an illumination laser that illuminates a moving object with a coherent, laser beam. The laser illumination is reflected from the object as separate...
5608522 Laser velocimetric and clinometric probe  
The invention relates to a laser velocimetric probe which includes a laser generator, a beam splitter, and a back scattering lens with an output to measuring devices for determining the velocity of...
5598259 Device to simulate the flow of a fluid so as to calibrate a laser velocimetric device  
Device to simulate the flow of a fluid for calibrating a laser velocimetric device. This device, able to simulate the flow of a fluid in order to calibrate a laser beam velocimetric chain,...
5594543 Laser diode radar with extended range  
An optical radar system includes a laser diode and an external cavity formed by a partial reflector for reflecting a first portion of the laser beam back into the diode. A second portion of the...
5589858 Information recording apparatus  
In an apparatus wherein a recording medium is conveyed by a conveying system with the front surface of the recording medium opposed to recording heads and information is recorded on the recording...
5587785 Laser doppler velocimeter  
A laser Doppler velocimeter in which laser light whose frequency changes continuously at least for a fixed time duration is branched into at least two beams, and the at least two branched beams are...
5574553 Ladar receiver incorporating an optical amplifier and polarization optical mixer  
To greatly increase the sensitivity of a Heterodyne Ladar System, the receiver incorporates an optical preamplifier to amplify the ladar return signal prior to detection. This results in an...
5557396 Velocity information detecting apparatus  
A velocity information detecting apparatus detects velocity information of a moving object. The apparatus is provided with a light source for emitting a coherent beam, a beam splitting member for...
5557407 Measuring apparatus having a diffraction grating for receiving a diverged light beam  
A speed measuring apparatus includes a light source unit for generating a diverged light beam, a diffraction grating for generating diffracted light when the diverged light beam from the light...
5552879 Doppler velocimeter  
A Doppler velocimeter includes an illuminating system for projecting a light beam for measurement onto an object to be measured at a predetermined working distance, and a light-receiving system for...
Matches 151 - 200 out of 451 < 1 2 3 4 5 6 7 8 9 10 >