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8183520 |
Optical fiber shape sensor calibration
Calibration methods and apparatuses for a shape sensing optical fiber are disclosed. Strain is sensed in an optical fiber that is associated with a kinematic chain, and information derived from the...
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8178827 |
Universal LED testing device
Apparatus for optically testing LEDs or other light-emitting components in a wide variety of test environments and to the degree necessary pertinent to the type(s) of faults encountered. In one...
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8153956 |
Interrogator for a plurality of sensor fiber optic gratings including a masking compensation operation
An interrogator for a plurality of sensor fiber optic gratings. The interrogator includes a broadband optical source; at least one beam splitter directing output of the optical source to the sensor...
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8155485 |
Plasmon photocatalysis
Plasmons on a waveguide may deliver energy to photocatalyze a reaction. The waveguide or other energy carrier may be configured to carry electromagnetic energy and generate plasmon energy at one or...
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8139905 |
Generator protection system
A temperature sensor is disclosed. The sensor includes an optical fiber and at least one twin-grating structure formed on the optical fiber. Each twin-grating structure includes a first optical...
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8124926 |
Key device and electronic device comprising the same
The key device of the present invention is provided with: first light-emitting portions that emit light propagating in a first direction; second light-emitting portions that emit the light R...
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8120774 |
Evanescent wave multimode optical waveguide sensitive to a chemical species and/or a physical parameter and provided with continuous redistribution of optical power between the modes
There is provided an evanescent wave multimode optical waveguide sensitive to a chemical species or to a physical parameter. The optical waveguide comprises a core and a cladding having a cladding...
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8121442 |
Optical fiber surveillance topology
In accordance with an aspect of the disclosed technology, a fiber surveillance system includes a single optical fiber, used, for example, in the detection of acoustic signals associated with...
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8098967 |
Generator protection system
A magnetic flux sensor is disclosed. The sensor comprises an optical fiber and at least one twin-grating structure formed on the optical fiber. Each twin-grating structure comprises a first optical...
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8071934 |
Method and system for detecting single-shot pulse contrast based on fiber array
A system for detecting single-shot pulse contrast includes a correlator generating a correlation signal, a spectral filter filtering light signals having wavelengths different from the correlation...
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8031988 |
Apparatus for pressure sensing
The present invention provides an apparatus for pressure sensing. The apparatus comprises a light guide, a Bragg grating incorporated into the light guide and a moveable wall portion. The moveable...
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8030633 |
Methods and systems for monitoring a solid-liquid interface
Methods and systems are provided for monitoring a solid-liquid interface, including providing a vessel configured to contain an at least partially melted material; detecting radiation reflected...
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8031989 |
Radiological and nuclear optical sensor
Optical systems for sensing radiation emissions from radiological and nuclear matter. An example system includes a light source, a light sensor, a processing device in signal communication with the...
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8026474 |
Device for transferring light signals between two elements relatively movable to one another
To ensure an energy-efficient transfer of light signals between two elements of a machine which are movable relative to one another, a device and a method for transferring light signals between...
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8014640 |
Optical power monitoring with robotically moved macro-bending
A method may include bending a first optical fiber of a plurality of optical fibers; measuring light leaked from the first optical fiber with a photo detector; robotically moving the photo detector...
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8003932 |
Evaluating the position of a disturbance
The present invention relates to a method of and apparatus for evaluating the position of a disturbance, in particular using a waveguide having a plurality of overlap regions. A position sensor is...
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8003933 |
Method and apparatus for blocking ambient light in a live fiber optic identifying device
Spurious light is prevented from entering a cover of an optical fiber identification device by placing an opaque, flexible medium such as brush bristles within optical fiber clearance openings in...
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8005323 |
Method and apparatus for generation and transmission of high energy optical pulses for long range measurements
A method and apparatus for generating and transmitting high energy optical pulses are described. Distributed temperature sensors usually use Raman scattering in optical fibers as the means to...
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8005325 |
Apparatus for sensing a motion
The present disclosure provides an apparatus for sensing a motion. The apparatus comprises an optical fibre portion comprising a Bragg grating and an element for reducing an impact of an external...
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7994469 |
Interrogator for a plurality of sensor fiber optic gratings having at least one filter for converting changes in peak reflection wavelength to changes in intensity
An interrogator for a plurality of sensor fiber optic gratings. The interrogator includes a broadband optical source; at least one beam splitter directing output of the optical source to the sensor...
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7973914 |
Physical quantity measuring apparatus utilizing optical frequency domain reflectometry and method for temperature and strain measurement using the apparatus
A physical quantity measuring apparatus utilizing optical frequency domain reflectometry includes a tunable laser; a first polarization maintaining fiber; a polarization maintaining coupler; a...
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7964839 |
Universal LED testing device
Apparatus for optically testing LEDs or other light-emitting components in a wide variety of test environments and to the degree necessary pertinent to the type(s) of faults encountered. In one...
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7956733 |
Optical fiber sensor for quantitative monitoring of deflection from high-speed launcher operation conditions
A measurement system is provided to monitor a launcher assembly along a path along which to accelerate a projectile. This system includes an optical sensor, a light emitter, a light detector and a...
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7956316 |
Fiber optic security system for sensing the intrusion of secured locations
A sensor for a security system is disclosed to detect intrusions at one or more predetermined locations wherein each location includes a moveable member which must be moved in order to intrude the...
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7947945 |
Fiber optic sensing system, method of using such and sensor fiber
An embodiment of a sensor fiber includes: at least two fiber sections with a plurality of holes; and at least one other fiber section situated between said at least two fiber sections, wherein the...
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7923678 |
Sensing method including interrogation of a holographic sensor
A sensing method, which comprises subjecting a holographic sensor to an external physical interaction to which the sensor is sensitive, and observing a change in the holographic image.
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7903907 |
Force and deflection sensor with shell membrane and optical gratings and method of manufacture
A sensor for force is formed from an elastomeric cylinder having a region with apertures. The apertures have passageways formed between them, and an optical fiber is introduced into these...
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7893396 |
Biometric device and information terminal
A compact biometric device includes a first light source for emitting light irradiated onto a subject; a first light guide whose surface is inputted with light radiated from the subject and outputs...
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7889332 |
Physical quantity measuring apparatus utilizing optical frequency domain reflectometry, and method for simultaneous measurement of temperature and strain using the apparatus
A physical quantity measuring apparatus utilizing optical frequency domain reflectometry of the invention includes a tunable laser; a first polarization-maintaining fiber; a...
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7884314 |
Light guide mechanism for guiding a light to an illuminance sensor
A light guide mechanism for an illuminance sensor includes: a lighting window configured to pass through an external light; the illuminance sensor configured to detect an illuminance of the light...
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7873273 |
Apparatus for measuring the characteristics of an optical fiber
An apparatus for measuring the characteristics of an optical fiber is provided. An optical pulse generator generates, from a coherent light, first and second optical pulses having a time interval...
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7872220 |
Electronic fiber optic seal monitors
The new seal monitor uses of a time dependant pseudo random number or a number from a time pad, which are lists of random numbers often used in encryption. This number changes periodically, for...
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7864321 |
Evanescent wave multimode optical waveguide sensor with continuous redistribution of optical power between the modes
There is provided an evanescent wave multimode optical waveguide sensitive to a chemical species or to a physical parameter. The optical waveguide comprises a core and a cladding having a cladding...
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7859666 |
Electric field sensor
The present invention relates to an electric field sensor including: a light source (1); an electro optic crystal (7) which is applied with an electric field based on a signal under test, in which...
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7852213 |
Double-end fiber optic security system for sensing intrusions
A security system is disclosed for detecting intrusions at a plurality of predetermined locations having moveable closure members. The system comprises a plurality of intrusion sensors disposed at...
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7835598 |
Multi-channel array processor
A method and apparatus for monitoring one or more environmental parameters using interferometric sensor(s), a cross-correlator, a two-dimensional photosensitive array and optical focusing means are...
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7800047 |
Apparatus and method for a computerized fiber optic security system
A computerized apparatus and method for detecting unauthorized activity in a protected area in real-time using a fiber optic cable having an optical sensor line, a fiber scanning unit, and a...
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7781724 |
Fiber optic position and shape sensing device and method relating thereto
The present invention is directed toward a fiber optic position and shape sensing device and the method of use. The device comprises an optical fiber means. The optical fiber means comprises either...
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7782196 |
Entrance security system
An entrance denial security system for detecting a fault condition at one or more entrances into a secured area representing unauthorized activity and an attempt to gain entry through the entrance....
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7781725 |
Optical fiber based sensor system suitable for monitoring remote aqueous infiltration
Methods and apparatus for predicting service life of remote equipment for infiltration of liquid are disclosed. Such methods and apparatus preferably include at least one fiber optic sensor...
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7768687 |
Photoelastic modulator
A photoelastic modulator, comprising a driving block and a driver transducer for perturbing said block in a predefined direction to establish a standing wave extending longitudinally in said block...
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7755027 |
Secure transmission cable having windings continuously laid in opposite directions
The invention consists of a secure data transmission cable for electronically transmitting secure data between remote locations in an exposed condition. The data transmission cable comprises a...
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7751664 |
Door handle apparatus for vehicle
A door handle apparatus for a vehicle, opening and closing a vehicle door, the door handle apparatus includes an informing portion for visually informing a state of the vehicle door, including a...
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7747386 |
Collision detection sensor
A collision detection sensor for detecting a collision of a vehicle and a collision object by converting the collision into a change in optical transmission characteristics of an optical fiber. The...
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7714271 |
Simple fiber optic seismometer for harsh environments
Disclosed is a sensor capable of measuring motion in a harsh environment. The sensor uses a fiber optic sensor element formed within a core of an optical fiber that is disposed within an enclosure...
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7705290 |
Multi-channel fiber relays for high energy laser delivery to multi-beam optical sensors
A multi-beam LADAR apparatus and a method for use in a multi-beam LADAR system are disclosed. The apparatus includes a plurality of mission specific optics; a gimbal in which the mission specific...
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7706640 |
Telecommunication optical cable for gas pipeline applications having built-in leakage detecting device
A telecommunication fiber optic cable for gas pipeline application has a built-in leakage detecting device. The cable has an optical core including a number of telecommunication optical fibers, an...
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7696471 |
Impact detection system using an optical fiber sensor
Disclosed is an impact detection system including: an optical fiber including a plurality of sensor sections to reflect light, a wavelength band of the reflected light vibrates depending on an...
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7693358 |
Fiber optic distributed sensor apparatus
A distributed fiber optic sensor device that employs a photonic band gap fiber as a sensing medium, in which: the photonic band gap fiber, which is the sensing medium, includes: a quartz section;...
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7687764 |
Fiber optic sensors for composite pressure tanks with micro bend pinch points
A low-cost fiber-optic sensor system for composite pressure tanks detects structural degradation of composite material pressure tanks. Light power attenuation in embedded optical fiber simulates...
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