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4148585 Three dimensional laser Doppler velocimeter  
A laser Doppler velocimeter which can measure fluid flow in three dimensions, employing a laser beam projected through a rotating diffraction grating and spaced lenses, with a beam splitter in the...
4142796 Blood flow measurement  
A beam of laser light is impinged on a vessel or vessels in which blood is flowing, such as vessels in the retina of the eye. The reflected light is detected with a photodetector to product a...
4140060 Subcarrier modulated optical transceiver  
A coherent optical modulated sensor for use with missiles and the like wherein a series of pulses of optical energy which are intensity modulated by a radio frequency sub-carrier are transmitted...
4126392 Optical system for laser doppler velocimeter and the like  
An LDV optical system for projecting a two-color, two-axis interference fringe system and collecting backscatter radiation for two component velocity measurement. A rotor within an optical head of...
3984685 Wind measurement system  
A system for remotely measuring vertical and horizontal winds present in discrete volumes of air at selected locations above the ground. A laser beam is optically focused in range by a telescope,...
3984686 Focused laser doppler velocimeter  
A system for remotely measuring velocities present in discrete volumes of air in which a CO2 laser beam is focused by a telescope at such a volume, a focal volume, and within the focusable range,...
3982101 Laser velocimeter real time digital data analyzer  
A digital analyzer for a laser velocimeter which compresses data into groups for a histogram display. A data processor containing the velocimeter information is fed through a multiplexer to a...
3966324 Laser doppler anemometer  
A laser doppler anemometer includes a source producing a laser beam which is then split into a plurality of partial radiation beams. A common optical image-forming system illuminates a measuring...
3915572 Combined dual scatter, local oscillator laser doppler velocimeter  
A laser Doppler velocimeter is described which is capable of effectively suring two different velocity components of a fluid simultaneously. Such a velocimeter includes a pair of coherent beams of...
3825346 INTERFEROMETERS FOR FLUID FLOW MEASUREMENTS  
An interferometer for detecting the velocity of small particles in a fluid includes relatively static means comprising a source of coherent radiation and a beam splitter means mounted in a fixed...
3811774 CONTINUOUS WAVE RADAR FOR RANGE AND VELOCITY MEASUREMENT  
A frequency modulated, continuous wave radar range measurement system using laser oscillator is disclosed. A ring laser, carbon dioxide (CO2), laser oscillator allows target range and velocity...
3795448 DOPPLER SHIFT SYSTEM  
A system for measuring velocities of radiating particles based on doppler shift is disclosed. Light from the particles is directed through a narrow band optical filter to a Fabry-Perot...
3788743 LASER RECEIVER SYSTEM  
A multi-tone gas laser emits light to a receiver. The receiver may be on the same vehicle as the light emitting laser, receiving light reflected from a moving vehicle, or the receiver and laser...
3765768 OPTICAL DEVICE FOR SIMULTANEOUSLY MEASURING THE DISTANCE AND SPEED OF A MOVING OBJECT WITH RESPECT TO A REFERENCE  
An optical device making it possible to simultaneously measure the distance and radial speed of a moving object with respect to a fixed reference. The device includes at least one laser generator...
3744910 APPARATUS FOR OPTICAL INVESTIGATIONS AND MEASUREMENTS WITH THE AID OF SEVERAL COHERENT LIGHT BEAMS  
In an apparatus for optical investigations and measurements in which a laser and a beam splitter produce coherent beams of monochromatic light, the beam splitter is a hologram that is a...
3734623 INTERFEROMETER UTILIZING A TUNABLE LASER OR SIMILAR FREQUENCY VARIABLE WAVE ENERGY GENERATOR  
An interferometer having a frequency tunable laser generator for reflecting laser light from a movable mirror to provide an optical interference fringe pattern. A servo circuit, that includes...
3708681 POSITION AND VELOCITY SENSOR  
An electro-optical transducer capable of producing output signals representative of both speed and position of a movable element. A scale has formed thereon a first track having a ruled pattern...
3704626 INTERFEROMETRIC METHOD AND APPARATUS FOR MEASURING GRAVITY GRADIENTS  
Method and apparatus for measuring gravity gradients directly. Two retroreflectors are caused to experience free flight and the radiation reflected by those retroreflectors during this free flight...
3644042 LASER SYSTEM FOR MONITORING THE MOTION OF OBJECTS  
The motion of an object may be monitored by directing a laser beam at both 3.39μ and 0.6328μ from a helium-neon laser oscillator toward the object to be monitored in such manner that a portion of...
3601491 DISTANCE-MEASURING INTERFEROMETER  
An interferometer for accurately measuring the displacement of a remotely positioned object includes means for projecting a first polarized beam of light at the object, for reflecting the...
3574292 INTERFEROMETER MOTION AND VELOCITY CONTROLLER  
An interferometer measuring system which constitutes means of measuring the magnitude and velocity of relative motion between two parts along a defined path, coacts with numerical command...
3572882 VARIABLE REFERENCE PHASE HOLOCAMERA TO COMPENSATE FOR OBJECT MOTION  
A variable reference phased holographic system for recording holograms of objects having some movement with respect to the photographic plate which has the conventional signal beam and reference...
3548655 MEASUREMENT OF FLUID OR SURFACE VELOCITIES  
3527532 DIGITAL OPTICAL FREQUENCY SHIFTER  
3503682 OPTICAL MIXING DEVICES  
3500688 GRAVIMETER  
3428816 SIGN DETECTOR  
3419330 Diffraction grating angular rate sensor  
3409369 Laser radar  
3293438 Signal mixing device for producing high frequency radiation  
3148456 Electrostatic accelerometer and/or gyroscope  
3073168 Accelerometer  
2948152 Accelerometer  
2936381 Light beam apparatus  
2833142 Ultrasonic, high pressure interferometer