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US20140293269 Deformation Measurement Sensor Operating In A Hostile Environment And Including An Optical Movement Measurement Module, And Measurement System Using Said Sensor  
Deformation measurement sensor operating in a hostile environment and including an optical movement measurement module, and measurement system using said sensor. The sensor includes: an enclosure...
US20110032512 FLOATING-ELEMENT SHEAR-STRESS SENSOR  
A shear-stress sensing system can include a floating element whose displacement can be detected through use of optical measurements. The system can utilize high temperature materials to deliver...
US20110310378 INTERFEROMETRIC MEASUREMENT WITH CROSSTALK SUPPRESSION  
An interferometric measurement system suppresses cross talk between optical waveguides used to measure one or more parameters. A first interferometric measurement channel coupled to a first...
US20080212067 INSPECTION AND STRENGTH MEASUREMENT OF SOLDER AND STRUCTURAL JOINTS USING LASER GENERATED STRESS WAVES  
Methods and apparatus are disclosed for direct measurement of the tensile strength of joints with use of laser spallation. A laser pulse is directed at a surface in communication with a solder...
US20080123079 RESIDUAL STRESS MEASURING METHOD AND SYSTEM  
A residual stress measuring method capable of measuring residual stress of the surface of an object to be inspected rapidly in a non-destructive non-contact manner, as well as a residual stress...
US20130293868 DETECTION OF FOREIGN OBJECT IN PROXIMTY OF SURGICAL END-EFFECTOR  
An optical detection tool employs a surgical end-effector (30) and an optical fiber (20). In operation, the surgical end-effector (30) is navigated within an anatomical region relative to an...
US20070273866 Tension Measurement By Optical Means  
An apparatus and method for determining a tension in a target strand is disclosed. The method and apparatus provides a non-contact way for determining tension in any type of elongate element...
US20050030551 Analysis and monitoring of stresses in embedded lines and vias integrated on substrates  
Techniques and systems for applying analytical computations of stresses to layers with embedded line features to obtain stress information, to design microstructures, and to design and control...
US20140022530 STRUCTURE MONITORING  
A method and apparatus for monitoring a structure using an optical fiber based distributed acoustic sensor (DAS) extending along the length of the structure. The DAS is able to resolve a separate...
US20090267918 Method for detecting users' pressing action and optical operating unit  
A method for detecting users' pressing action is applied to an electronic apparatus which has at least an optical operating unit for an user to operate the electronic apparatus. The method...
US20110273701 METHODS FOR CHARACTERIZATION OF THE MECHANICAL PROPERTIES OF THIN FILMS AND TEST STRUCTURES FOR PERFORMING THE SAME  
A test structure allows one or more deposited thin film layers to be moved such that mechanical properties of the thin film layer or layers may be determined. Methods for characterizing the...
US20080204706 System For Distributed Measurement of the Curves of a Structure  
The invention relates to a system for distributed or dispersed measurement of axial and bending deformations of a structure including at least one threadlike device (10) equipped for the...
US20140111789 Optical Fiber Coupled Photonic Crystal Slab Strain Sensor, System And Method Of Fabrication And Use  
The present disclosure is generally directed to a strain sensor, system and method of fabrication and use that includes an optical fiber, an optical signal generator that transmits an optical...
US20110032511 SYSTEM AND METHOD TO MEASURE NANO-SCALE STRESS AND STRAIN IN MATERIALS  
A system for measuring stress and strain in a sample is provided. The system includes a sample holder operable to support the sample; a stress inducing assembly operable to apply force to a...
US20050146708 Systems and methods for deformation measurement  
A system for the real-time and in-situ macro and micro measurement of in-plane deformations of a microelectronic package or the like comprises a closed environmental chamber (3) within which a...
US20110085156 DETECTING PARTICULATE CONTAMINANTS IN A FLUID  
A vibration detector (1) comprising at least one fibre optic sensor (2) mechanically coupled to a flexible support member (3). The vibration detector (1) is mounted on the outside of the pipeline...
US20130250278 PORTABLE HIGH-RESOLUTION NON-CONTACT MODULAR SENSOR FOR SURFACE STRAIN MEASUREMENT  
A portable optical sensor for measuring surface strain in an object, such as pre-stressed concrete articles, is provided. The sensor is a modular device comprising at least first and second...
US20110090936 SYSTEM AND METHOD FOR USING COHERENTLY LOCKED OPTICAL OSCILLATOR WITH BRILLOUIN FREQUENCY OFFSET FOR FIBER-OPTICS-BASED DISTRIBUTED TEMPERATURE AND STRAIN SENSING APPLICATIONS  
Systems and methods are disclosed for distributed temperature and strain sensing along a length of an infrastructure. Two optical sources, such as, external cavity lasers with a narrow linewidth,...
US20110299064 DEFORMATION MEASURING APPARATUS AND DEFORMATION MEASURING METHOD  
An apparatus and a method capable of measuring large deformation with a high accuracy and dynamically, using speckle interference, utilizes an optical path where one laser beam out of two laser...
US20100134783 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...
US20110317148 REGISTRATION OF AN EXTENDED REFERENCE FOR PARAMETER MEASUREMENT IN AN OPTICAL SENSING SYSTEM  
An interferometric measurement system measures a parameter using at least one optical waveguide. A memory stores reference interferometric pattern data associated with a segment of the optical...
US20130337585 MULTIPLE OPTICAL WAVELENGTH INTERFEROMETRIC TESTING METHODS FOR THE DEVELOPMENT AND EVALUATION OF SUBWAVELENGTH SIZED FEATURES WITHIN SEMICONDUCTOR DEVICES AND MATERIALS, WAFERS, AND MONITORING ALL PHASES OF DEVELOPMENT AND MANUFACTURE  
Methods and systems for resolving and determining sub-wavelength sized features and stresses by using infrared optical and thermal wavelength probing for holographic or interferometric evaluation...
US20170153387 WEAK REFLECTION TERAHERTZ FIBER OPTIC DEVICES FOR DISTRIBUTED SENSING APPLICATIONS  
The present disclosure provides a novel fiber optic sensing device using ultra-weak, terahertz-range reflector structures. A fiber optic sensor device for distributed measurements...
US20170153155 METHOD AND SYSTEM FOR DETECTING DYNAMIC STRAIN  
A system and method for detecting dynamic strain of a housing. The system includes an optical fiber linearly affixed along a surface of a length of the housing and an interrogator comprising a...
US20170153154 A DEVICE AND SYSTEM FOR DETECTING DYNAMIC STRAIN  
A device and system for detecting dynamic strain. The device comprises a longitudinally extending carrier and an optical fiber embedded along an outer surface of a length of the carrier. The...
US20170146338 OPTICAL STRAIN GAUGE  
This disclosure presents a method of measuring the strain response of a test material remotely by optical devices using a thin multi-layer assembly, called an optical strain gauge, which is...
US20170052091 OPTICAL FREQUENCY DOMAIN REFLECTOMETRY, OPTICAL FREQUENCY DOMAIN REFLECTOMETER, AND DEVICE FOR MEASURING POSITION OR SHAPE USING THE SAME  
To eliminate a need for polarization adjustment, to simplify a configuration, and to make a configuration at low cost. Wavelength swept light is provided to a measurement-target optical fiber...
US20160377528 TESTING OF AN INDUSTRIAL STRUCTURE  
A method and a device for analyzing a structure by tomography and diffuse acousto-elastic field correlation are provided. An optical fiber comprising a plurality of measurement points of FBG...
US20160290789 Method and System for Determining In-Plane Distortions in a Substrate  
The determination of in-plane distortions of a substrate includes measuring one or more out-of-plane distortions of the substrate in an unchucked state, determining an effective film stress of a...
US20160265990 OPTICAL FIBER COUPLED PHOTONIC CRYSTAL SLAB STRAIN SENSOR, SYSTEM AND METHOD OF FABRICATION AND USE  
The present disclosure is generally directed to a strain sensor, system and method of fabrication and use that includes an optical fiber, an optical signal generator that transmits an optical...
US20160265900 SPATIAL PHASE-SHIFT SHEAROGRAPHY SYSTEM FOR NON-DESTRUCTIVE TESTING AND STRAIN MEASUREMENT  
Embodiments of a shearography system may include light sources configured to produce beams of light to illuminate a test area. Each of the beams of light may include a different wavelength. A...
US20160061672 INTERFEROMETRIC OPTICAL FIBER SENSOR SYSTEM AND INTERFEROMETRIC OPTICAL FIBER SENSOR HEAD  
An interferometric optical fiber sensor system comprises a light source, a first coupler optically connected to the light source, a first optical path for inputting measurement light, a second...
US20160054116 Scanning interferometry technique for through-thickness evaluation in multi-layered transparent structures  
A multi-layer transparent composite detection technique includes producing two beams from a single, low-coherence source, a test beam and a reference beam, and scanning the reference beam to...
US20150362386 FIBER OPTIC SENSOR SYSTEM AND METHOD  
A fiber Bragg grating (FBG) is used to measure strain. An optical fiber is used with a grating that comprises periodic spatial variations with mutually different first and second spatial...
US20150338251 AN ABSOLUTE POSITION MEASURING DEVICE AND A METHOD OF PERFORMING AN ABSOLUTE POSITION MEASUREMENT  
The invention relates to an absolute position measuring device, comprising an optical fiber, an optical strain sensor in optical communication with the optical fiber, and a volume of material...
US20150330848 OPTICAL DEVICE UTILIZING FIBER BRAGG GRATING AND NARROWBAND LIGHT WITH NON-BRAGG WAVELENGTH  
In certain embodiments, an optical device and a method of use is provided. The optical device includes a fiber Bragg grating having a substantially periodic refractive index modulation along a...
US20150316427 OPTICAL FIBER COUPLED PHOTONIC CRYSTAL SLAB STRAIN SENSOR, SYSTEM AND METHOD OF FABRICATION AND USE  
The present disclosure is generally directed to a strain sensor, system and method of fabrication and use that includes an optical fiber, an optical signal generator that transmits an optical...
US20150300961 Electronic Device Having Components With Stress Visualization Features  
An electronic device may have housing structures, electrical components, and other electronic device structures. Stress sensing structures may be formed using coatings on these electronic device...
US20120033198 High Speed Autofocus Interferometric Inspection Systems And Methods  
High speed autofocus interferometric inspection systems and methods are discussed in this application. In accordance with some embodiments, an inspection system can generally include a laser...
Matches 1 - 39 out of 39