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7616294 |
Laser anemometry with improved eye safety
The invention relates to an optical measurement device intended for determining a relative velocity vector {right arrow over (v)} of a carrier, such as an aircraft, with respect to a reference...
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7616293 |
System and method for traffic monitoring, speed determination, and traffic light violation detection and recording
A system of lasers and detectors to detect the presence of objects and determine their speed is disclosed. The system comprises of a pair of lasers and a pair of detectors focused through a single...
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7612871 |
Frequency-multiplexed detection of multiple wavelength light for flow cytometry
A multiplexed set of light sources having outputs of light with various wavelengths which are combined into one beam. The beam may impinge a particle in a flow channel of a cytometer. The light...
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7609368 |
Optical device and method for sensing multiphase flow
A method for measuring the velocity of a multiphase fluid flowing in a pipe. The method comprises directing at least two collimated beams of light from an illuminator through the multiphase fluid...
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7599044 |
Method and apparatus for remotely detecting presence
An apparatus for detecting a person's presence without requiring the person to provide auditory or tactile input. The invention may be incorporated into an electronic device, such as a desktop...
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7590500 |
System for high dynamic range analysis in flow cytometry
A flow cytometer capable of using electronics to analyze a large dynamic range while avoiding and/or correcting traditional limitations of acquisition electronics. The invention allows for...
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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...
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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...
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7576838 |
Radar device
A radar device has a wave projecting part for projecting pulsed electromagnetic waves to a target object in a specified direction at specified time intervals, a wave receiving part for receiving...
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7567341 |
Optical navigation device adapted for navigation on a transparent structure
A technique for adapting an optical navigation device for navigation on a transparent structure such as a glass plate involves establishing a navigation window for navigation tracking, detecting...
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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...
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7561254 |
Traveling system for mobile bodies and control method therefor
A traveling system for mobile bodies includes a control device for controlling traveling operation of a first and a second mobile bodies based on detection information provided by a relative...
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7557907 |
Object-detection device for vehicle
The object-detection device for vehicle provides a transmission-and-reception device; a reflection point calculation device; a segment setting device; a median point calculation device; and a...
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7548306 |
Optical encoder, method for preparing the optical encoder, and moving speed controlling device and apparatus using the optical encoder
An optical encoder including a sensor module including a light emitting member, a light receiving member opposite to the light emitting member to receive the emitted light, and at least one boss...
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7545486 |
Apparatus and method for determining the closing velocity of a vehicle door
An apparatus for measuring a closing velocity of a vehicle door includes a housing, first and second sensors, and a processor. The first sensor is coupled to the housing, has a first detection...
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7542130 |
Moving body measuring apparatus
An apparatus has an optical member having a boundary surface on which light is incident, the optical member being adapted to transmit light entering the boundary surface from one side and to...
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7535580 |
Image forming apparatus and image forming method
An image forming apparatus which can form an even image while maintaining high resolution. A speckle pattern detecting unit detects a speckle pattern on a surface of a photosensitive drum. A motor...
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7533572 |
High bandwidth fiber optic vibration sensor
Apparatus and method for monitoring vibration levels in rotatable machinery ( 52 ). In one embodiment, a system ( 50 ) includes a source ( 66 ) for generating coherent radiation ( 70 ) and a first...
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7532311 |
Efficient lidar with flexible target interrogation pattern
A system for observing a field of view including a light transmitter and a light detector. A path is defined between the transmitter and the detector. The light transmitter generates substantially...
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7523657 |
Method and device for measuring air turbulence in the surroundings of an aircraft
A device for measuring air turbulence in the surroundings of an aircraft includes a measurement system having lidars which are mounted on the aircraft and which are intended to carry out, during a...
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7505121 |
Multi-beam optical range sensor and self-propelled cleaner and air-conditioner equipped with the same
In this multi-beam optical range sensor, since the diffraction grating splits output light of the light-emitting element into a plurality of beams, a plurality of beams can be outputted from the...
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7495822 |
Frequency shifter in an optical path containing a continuous laser source
The present invention relates to a frequency shifter in an optical path containing a continuous laser source, and it comprises at least two frequency shift modules placed in parallel and each...
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7495774 |
Optical air data system
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 into an atmosphere. Light from the at...
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7492445 |
Method and apparatus for robust velocity prediction
One embodiment relates to a method of velocity prediction using a sensor array. Differential signals are obtained from the sensor array at multiple frame rates. A first velocity prediction is...
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7492351 |
Optical navigation based on laser feedback or laser interferometry
A computer cursor control device includes (1) a light source generating light directed toward a stationary surface, (2) an optional phase modulator, (3) an optional function generator causing the...
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7490016 |
Method and apparatus for calibrating position of image sensor, and method of detecting position of image sensor
A method and apparatus for calibrating a position of an image sensor, and a method of detecting the position of an image sensor are provided. The method of calibrating the position of an image...
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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...
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7466398 |
Optical navigation device and method thereof
An optical navigation device and a method thereof, wherein the optical navigation device comprises a pair of linear sensor arrays which are arranged non-parallel to each other for detecting light...
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7463342 |
Optical tracking device using micromirror array lenses
The optical tracking device of this invention comprises a lens unit, a control circuitry communicatively coupled to the lens unit, and an imaging unit optically coupled to the lens unit. The lens...
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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...
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7463340 |
Ladar-based motion estimation for navigation
A method for estimating motion with at least one laser radar is disclosed. The method involves scanning a first range image at a first time, locating a plurality of object features in the first...
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7460215 |
Method and device for optically measuring distance or speed
The invention relates to a method for measuring a distance-related variable such as distance, speed or acceleration, or for levelling. An emitting device ( 1 - 6 ) comprising at least one...
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7456970 |
Pulse finding apparatus and method
A method of finding a temporal location of a reflected pulse in a system for remotely measuring characteristics of a target scene. The method includes steps of: (a) transmitting a pulse burst of...
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7453569 |
Method and apparatus for measuring particle motion using scattered radiation
A method and apparatus for measuring particle motion using electromagnetic radiation uses beams of radiation modulated with a distinct frequency and/or phase. A particle traversing these beams...
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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...
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7444006 |
Method of image qualification for optical navigation sensor
An image qualification method. A motion detection method. An optical navigation sensor. Image qualification, requiring only a single image frame to determine if an image frame is qualified,...
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7430305 |
Image velocity computer and method for computing image velocity
An image velocity computing device having a camera, a microcomputer, and a camera control is provided. The camera has a controllable exposure time, and is capable of capturing a plurality of images...
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7423737 |
Velocity determination utilizing two photosensor arrays
A technique for relative velocity determination between a surface and a velocity determination system involves capturing a set of outputs from a first photosensor array and then comparing...
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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...
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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...
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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...
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7414706 |
Method and apparatus for imaging a target using cloud obscuration prediction and detection
A method is provided for imaging targets using an unmanned air vehicle. The method comprises the steps of making a determination of cloud obscuration of a target, selecting an imaging sensor based...
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7414705 |
Method and system for range measurement
A method ( 200 ) and system ( 220 ) for range detection is provided. The system can include a sensing unit ( 110 ) for detecting a location and movement of a first object ( 401 ), and a processor (...
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7408629 |
Passive measurement of terrain parameters
A method and a system for determining a terrain parameter relative to a vehicle ( 100 ) by registering a first image from the vehicle located at a first point in space, then registering a second...
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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...
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7405813 |
System and method for measuring tip velocity of sprayed fuel
A system and method for measuring tip velocity of sprayed fuel in an engine includes a light source, a lens, a Charge-Coupled Device (CCD) camera, and a control unit. The lens allows light, which...
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7402805 |
Device for the in-situ measurement of acoustically stimulated bioluminescence
A device and method of use for measurement of in-situ bioluminescence generally comprising an acoustical pulse generator, a detector chamber, a lens assembly and a photomultiplier tube. The...
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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...
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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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