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7623223 |
Stress measurement method
An object of this invention is to provide stress measurement method that is stress of the measuring object nondestructively in a short period of time. In order to attain this object, the stress...
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7612873 |
Surface form measuring apparatus and stress measuring apparatus and surface form measuring method and stress measuring method
In a stress measuring apparatus, reflected light of light emitted to a substrate through an objective lens is received by a light shielding pattern imaging part, to acquire an image of a light...
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7599047 |
Method and system for simultaneous measurement of strain and temperature
A method and system for simultaneously measuring strain and temperature characteristics of an object involves the attachment to the object of a pair of optical fibers having different refractive...
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7583367 |
Catheter surgery simulation
It is possible to observe a state of stress applied to a region around a cavity replicating a body cavity such as a blood vessel and the like in a three-dimensional model. In catheter insert...
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7551268 |
System for monitoring sealing wear
A system for determining at least one condition of a seal including an optical fiber for transmitting light from a light source. The optical fiber is embedded in the seal and operatively coupled to...
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7543982 |
Sensor and disturbance measurement method using the same
The present invention relates to a sensor or the like having a structure that enables accurate temperature measurement in a wide temperature range including a low-temperature region and is suitable...
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7534031 |
Temperature measuring device and temperature measurement method
The temperature measuring device of the present invention comprises: a light source for outputting light; an optical fiber to which light outputted by the light source is inputted and from which...
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7522269 |
Bonded part peeling shape identification device
A bonded part peeling shape identification device includes: a processor for obtaining measurement value information indicating a spectrum from an output light of an optical fiber sensor arranged in...
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7505122 |
Evaluation method and manufacturing method of light-emitting element material, manufacturing method of light-emitting element, light-emitting element, and light-emitting device and electric appliance having light-emitting element
The present invention provides an evaluation method for evaluating whether a light-emitting element material to be evaluated is suitable for a host material or a guest material. By carrying out a...
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7501596 |
Dimension sensor and method for stopping expansion of a tube
A dimension sensor is used in conjunction with a tube and includes a body member and at least one detector element. The body member has an inner surface defining an opening sized to receive the...
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7495750 |
Monitoring device for rotating body
The present invention relates to a monitoring device for a rotating body, which can accurately measure signals from a fiber Bragg grating sensor provided on the rotating body by compensating a...
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7495749 |
Rapid method for sub-critical fatigue crack growth evaluation
In a method and system for evaluating sub-critical fatigue crack growth in a semiconductor device, a plurality of energy pulses generated by an energy source are repeatedly impinged onto the...
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7477995 |
Optical linear strain gage
An optical linear strain gage includes a target, a sensor, and a computer, wherein the target contains a gage length defined by end points. The target can be a one-dimensional barcode, the gage...
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7460216 |
Surface strain measuring device
The device enables strains of at least one surface ( 1 ) of a sample ( 2 ) to be measured versus temperature. Strains in a direction perpendicular to a predetermined plane, for example the plane of...
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7444882 |
Material failure prediction/stress/strain detection method and system using deformation luminescence
A method and apparatus are provided for detecting strain, stress, fatigue and incipient failure in materials. A detector (e.g., a photomultiplier tube) is used to detect photonic emissions from a...
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7430038 |
Apparatus for enhancing visualization of mechanical stress
Photoelastic elements are formed deliberately with stress concentrations so that, when evaluated with a polariscope, more pronounced isochromatic bands or fringes result when loads are applied to...
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7403323 |
Process control monitors for interferometric modulators
Process control monitors are disclosed that are produced using at least some of the same process steps used to manufacture a MEMS device. Analysis of the process control monitors can provide...
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7391507 |
Method of photo-reflectance characterization of strain and active dopant in semiconductor structures
A new method of photo-reflectance characterization of strain and active dopant in semiconductor structures has been developed for characterization of physical properties of semiconductor...
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7327444 |
Substrate inspection apparatus and method
The present invention provides a method and substrate examining device that sequentially and automatically measures at least the thickness and the internal stress of the thin film at a...
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7317514 |
System and method for optimizing heat management
Disclosed are heat management method, and system, and computer program product that include at least one optical strain gauge that is mounted on a printed board in proximity to an object being...
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7307702 |
Color switchable stress-fracture sensor for damage control
A color switchable stress/fracture sensor in combination with a structure. The combination apparatus includes a structure requiring stress and/or fracture detection, and at least one...
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7295307 |
Method of and apparatus for measuring stress of semiconductor material
The present invention provides a method of and a device for measuring the stress in a semiconductor material. An excitation light is irradiated on a semiconductor material formed with a silicon...
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7289231 |
Apparatus and method for determining physical properties of a mask blank
An apparatus for determining physical properties of a mask blank. The apparatus includes, for example, an illumination device for radiating a predetermined light laterally into the mask blank, a...
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7286210 |
Passive optical sensor using carbon nanotubes
A passive optical sensor operates independently of light amplitude by using a semiconducting carbon nanotube material. The material has an optical property dependent on wavelength, e.g., wavelength...
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7277162 |
Dynamic performance monitoring of long slender structures using optical fiber strain sensors
A method is described using optical fiber technology to measure the vibration characteristics of long slender structures subjected to dynamic disturbances imposed by water or wind generated loads....
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7190440 |
Controlling compressive force using pressure sensitive film
A film is placed between contacting surfaces in an assembly. The film has an optical property responsive to pressure. A compressive force is applied to the contacting surfaces to generate an...
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7170590 |
Distributed optical fiber sensor system
A distribution optical fiber sensor system measures distortion and temperature of a structure with a high spatial resolution. The system has an optical fiber on an object to be measured. A light...
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7030366 |
Micro piezo-optic composite transducers and fabrication methods
A micro piezo-optic composite transducer comprises: dielectric material; electrodes situated over opposing surfaces of the dielectric material; an optical fiber embedded in the dielectric material,...
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7024343 |
Method for calibrating a mathematical model
A method is disclosed for calibrating a mathematical model of a component using prototype full-field experimentally collected deformation/strain data. Specifically, the method involves obtaining...
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7005630 |
Energy-modulating fiber grating sensor
This invention relates to a new technique of interrogating fiber grating sensors employed for measuring physical quantities such as temperature and force. The technique involves the edge filtering...
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6999641 |
Measurement of large strains in ropes using plastic optical fibers
A method for the direct measurement of large strains in ropes in situ using a plastic optical fiber, for example, perfluorocarbon or polymethyl methacrylate and Optical Time-Domain Reflectometer or...
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6985213 |
Method and apparatus for measuring material property
The present invention provides a method and apparatus mainly for measuring mechanical properties, electrical properties and transducer properties (e.g., electromechanical coupling constant) of...
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6956981 |
Long base, stretched fiber-optic Bragg network extensometer and production method for same
An extensometer including a base, a tensioned optical fiber, and a Bragg grating. The extensometer relates particularly to monitoring of structures. Part of the optical fiber containing the Bragg...
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6934013 |
Compressed symbology strain gage
A compressed symbology strain gage includes a target in the form of a symbolic strain rosette (“SSR”), the target being associated with a body for which strain is to be measured and being...
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6912912 |
Pressure sensor having an optical waveguide and method for pressure detection
A pressure sensor includes an optical waveguide having an optical fiber with a refractive index n 1 , located in a fiber guide with a refractive index n 3 , forming an intermediate region. A medium...
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6876786 |
Fiber-optic sensing system for distributed detection and localization of alarm conditions
An optical fiber sensor system comprising of an optical fiber including plurality of sensitive elements, each sensitive element has characteristic spectral band which in normal undisturbed...
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6847438 |
Apparatus for inspecting surface strain of magnetic tape
A tape surface strain inspecting apparatus which optically inspects a surface of a tape and surface strain of the tape is characterized by being provided with a light emitting device emitting a...
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6826491 |
Method and apparatus for providing film stress measurements based on substrate displacement
Method and apparatus for providing film stress measurements. The invention provides a method for calculating film stress based on an inverse finite element analysis of a displaced substrate such as...
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6822218 |
Method of and apparatus for wavelength detection
A reflected light from a Bragg grating in an electrical transformer or other apparatus at which temperature is to be measured, is positioned by an optocoupler through a second fiber provided with a...
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6822217 |
Optical spectrum analyzer
An optical spectrum analyzer ( 10 ), receiving a multi-channel optical signal ( 12 ). The optical signal ( 12 ) is passed through an optical isolator ( 14 ) and a fiber coupler ( 16 ) to a tunable...
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6813403 |
Monitoring of large structures using brillouin spectrum analysis
Brillouin scattering spectrum analysis is used to measure strain, displacement, temperature or other physical quantities at any location along an optical fiber attached to a structure. The fiber...
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6810748 |
Method for evaluating creep lifetime
A part where a creep void is recognized is observed at an arbitrary magnification by a scanning electron microscope, an optical microscope, and a laser microscope, and the maximum value of creep...
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6809803 |
Surface topology inspection
Apparatus and a method for inspecting a topology of a surface ( 2 ) of a structural member ( 1 ) are provided. The degree to which a known type of stress has been applied to the member may be...
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6785051 |
Intrinsic birefringence compensation for below 200 nanometer wavelength optical lithography components with cubic crystalline structures
Stress-induced photoelastic birefringence compensates for intrinsic birefringence of cubic crystalline structures in deep ultraviolet (less than 200 nm) microlithographic imaging systems. Both the...
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6781113 |
Fiber bragg grating strain sensor with arc configuration
A strain sensor has a fiber Bragg grating fastened in a one-quarter circular arc to the strain sensing section of a strain sensor member. One end of the fiber Bragg grating is aligned in the...
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6771356 |
Scatterometry of grating structures to monitor wafer stress
A system for monitoring a fabrication process is provided. The system includes one or more light sources, each light source directing light to one or more gratings on a wafer. Light reflected from...
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6710861 |
Method and apparatus for measuring web strain in a confined area
This invention is directed to a method and apparatus for the measurement of web strain in a confined area. The apparatus comprises a fiber optic scope means and a fiber optic tube means operatively...
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6710328 |
Fiber optic composite damage sensor
A composite structure contains crystalline and/or polycrystalline triboluminescent elements distributed therein externally and/or internally, totally and/or regionally. The structure is...
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6698919 |
Method of utilizing a fiber for simultaneously measuring distributed strain and temperature
A method that utilizes a dispersion-shifted fiber having compound compositions with different temperature coefficients in core to simultaneously measure the distributed strain and temperature based...
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6650405 |
Method for detecting stress and strain
A method of detecting stress and strain using a powder coat finish and photoelastic techniques. A part is provided with a photoelastic layer comprising a non-opaque powder coat finish that becomes...
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