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7620513 |
Optical time domain reflectometer, and optical fiber measuring method and optical fiber measuring system using the same
In order to easily and efficiently carry out various characteristic evaluations of optical fibers which have been laid down, a table file which is for carrying out association of optical fibers...
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7616318 |
Apparatus for measuring waveform of optical electric field, optical transmission apparatus connected thereto and a method for producing the optical transmission apparatus
An electric field waveform of an optical signal is precisely measured with high time resolution. Particularly, determination of inter-symbol interference has been difficult. Output light from the...
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7609370 |
Single detector based dual excitation wavelength spectra display
A single detector based spectroscopy system using FAST (fiber array spectral translator) fibers and two excitation sources in conjunction with a holographic spectrum analyzer (HSA) to obtain...
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7605912 |
Application of statistical inference to optical time domain reflectometer data
The present invention relates to a method for interpreting data obtained by measuring a length of optical fiber using an optical time domain reflectometer (OTDR), and comparing that measurement to...
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7605911 |
System and method for visual quality characterization of holographic materials
Apparatus and method for characterizing perceived visual quality of holographic materials, such as diffraction gratings. A white light source directs a collimated beam onto an embossed material....
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7604984 |
Spatially scanned optical reader system and method for using same
An optical reader system is described herein that uses a scanned optical beam to interrogate a biosensor to determine if a biomolecular binding event occurred on a surface of the biosensor. In one...
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7602499 |
Measuring polarization mode dispersion
A device for measuring polarization mode dispersion (PMD) in a device under test (DUT) includes a polarized light source for launching a test beam through the DUT, and a PMD analyzer, which uses...
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7595866 |
Method for measuring non-circularity at core portion of optical fiber parent material
A method for measuring non-circularity of a core portion of an optical fiber base material includes a distribution measuring step of (i) moving the optical fiber base material in a direction...
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7595865 |
Optical time domain reflectometry for two segment fiber optic systems having an optical amplifier therebetween
An optical time domain reflectometry apparatus for sensing a parameter in a region of interest is characterized in that the optical fiber includes a first section into which optical radiation at...
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7595864 |
Optical sensor for the instantaneous detection and identification of bioaerosols
The invention relates to an apparatus and a process of using the said apparatus in the in-time air sampling, detection and identification of bioaereosols; wherein identification of the said aerosol...
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7593098 |
High dynamic range photon-counting OTDR
An optical time domain reflectometer (OTDR) operates in a gated mode, enabling a predetermined width of an optical fiber to be analyzed. The OTDR may test only a desired position on the fiber. Data...
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7586085 |
Photo-detection device and method
The broad range measurement exploiting the usual propagated light and the high resolution measurement mode exploiting near-field light are to be accomplished with a sole as-assembled optical probe....
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7585107 |
Corrected DTS measurements based on Raman-Stokes signals
Methods and apparatus allowing distributed temperature sensing (DTS) measurements to be compensated for differential and/or varying loss between Raman Stokes and anti-Stokes signals are provided....
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7583371 |
Combined bragg grating wavelength interrogator and brillouin backscattering measuring instrument
A method and apparatus sense attributes of reflected signals in an optical sensing system. In one embodiment, a method for sensing in an optical sensing system comprising an interrogator coupled to...
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7583370 |
Resonant structures and methods for encoding signals into surface plasmons
A device for coupling an input signal to an output signal includes a metal transmission line; an ultra-small resonant receiver structure operatively connected to an end of the transmission line...
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7582473 |
Apparatus and method for analyzing bacteria
An apparatus for analyzing bacteria is described that includes an analyte sample preparing section for preparing an analyte sample from a specimen; a detector for detecting optical information from...
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7580120 |
Blood analyzer, sample analyzer, and flow cytometer
A sample analyzer is provided that is capable of eliciting sufficient performance of an avalanche photodiode, and performing high-precision analysis of the sample. The sample analyzer is provided...
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7577668 |
Information transmission system and information transmission method
A high reliability information transmission system which can continue transmission upon at the occurrence of multiple failures. The system includes two transmission lines and transmission terminals...
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7576846 |
Apparatus and method of non-sampling-based Q-factor measuring
A non-sampling-based Q-factor measuring apparatus and method use a power conversion module to transform the power variation of inputted optical signals in time domain into the variation in other...
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7576845 |
Three-dimensional color and shape measuring device
A three-dimensional color and shape measuring device is provided which measures a color and a three-dimensional shape of an object based on an image signal acquired by picking up an image of the...
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7576844 |
Systems and methods for use in detecting harmful aerosol particles
The invention provides systems and methods for detecting aerosols. The systems and methods can be used to detect harmful aerosols, such as, bio-aerosols.
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7576842 |
Random-type identifying material, 3-D identifying system and method using the same
The present invention relates to a random type recognition object for an identification apparatus wherein identification particles are distributed irregularly within a 3D shape and a positional...
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7576840 |
Brillouin spectral measuring method and Brillouin spectral measuring apparatus
The present invention relates to a Brillouin spectrum measuring method and measuring apparatus that have a structure for more accurately measuring the parameters of Brillouin spectra at...
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7570350 |
Detecting different spectral components of an optical signal by means of an optical shutter
Detecting different spectral components of a response signal received from a device under test -DUT- in response to a stimulus signal, with a first splitter receiving the response signal and...
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7570349 |
Cars/absorption dual mode electro-optic sensor
A target gas sensing system includes a single source at a first location for generating two light beams having first and second frequencies wherein the difference between the first and second...
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7570348 |
Methods and apparatus for navigating a surface
In one embodiment, a surface is navigated by 1) using a first light sensor, mounted to a navigation device, to detect light reflected from a surface, and 2) using outputs of the first light sensor,...
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7565037 |
Reducing depolarisation
The present invention provides a method for reducing spreading of a pulse in a transmission line, said spreading being as a result of polarization mode dispersion, comprising inducing predetermined...
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7564542 |
Asymmetric capillary for capillary-flow cytometers
The present invention provides improved capillaries that lead to increased resolution in conventional capillary-flow cytometers. The cross-sectional shape of capillaries made according to the...
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7564541 |
System for obtaining images in bright field and crossed polarization modes and chemical images in raman, luminescence and absorption modes
An integrated system including one or more light sources, at least one processor, an optical lens, a two-dimensional tunable filter, one or more two-dimensional array of detection elements and...
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7561267 |
Flow cytometer
The present invention relates to a flow cytometer, comprising a light source, a light beam shaping module for collimating and converging a light beam emitted from the light source so that the light...
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7557926 |
Apparatus for measuring semiconductor physical characteristics
A reflectometry method and apparatus for gathering meaningful reflectance data indicative of one or more characteristics of a substance being grown on a horizontal substrate within a reaction...
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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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7548077 |
Measuring apparatus and a measuring method for measuring a polarization characteristic of an optical system
A measuring apparatus is disclosed which includes an interferometer for measuring a wavefront of light transmitted through a test object by interference between light under test passed through the...
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7545505 |
Device and method for a combined interferometry and image-based determination of geometry, especially for use in micro system engineering
The apparatus according to the invention comprises an object lens which can operate in at least two different measuring modes. In a first, interference mode a workpiece is measured by means of...
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7538883 |
Distributed strain and temperature discrimination in polarization maintaining fiber
A portion of a polarization maintaining (PM) optical fiber having two polarization states is analyzed. First and second spectral responses of the PM fiber portion are determined. In a preferred...
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7538862 |
Testing system for digital camera modules
A testing system ( 200 ) for digital camera modules ( 100 ) includes a first testing module ( 50 ), an assembling mechanism ( 60 ), a focusing module ( 62 ), a second testing module ( 70 ), a...
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7532320 |
Multimodal method for identifying hazardous agents
The invention relates to apparatus and methods for assessing occurrence of a hazardous agent in a sample by performing multimodal spectral analysis of the sample. Methods of employing Raman...
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7532314 |
Systems and methods for biological and chemical detection
A biological and chemical detection system is provided that detects and identifies biological and/or chemical particulates of interest. The biological and chemical detection system comprises a...
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7529434 |
Brillouin distributed temperature sensing calibrated in-situ with Raman distributed temperature sensing
Methods and apparatus for distributed temperature sensing (DTS) along a single mode or multimode optical waveguide or fiber include a calibration of initial Brillouin-based DTS measurements using...
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7522285 |
Method for determining the frequency response of an electrooptical component
The aim of the invention is to provide a method for determining the frequency response of an electrooptical component, particularly, for example, of a light-generating or light-modulating...
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7522273 |
Apparatus and method for measuring an optical characteristic without adverse effects of a deviation of a polarized component
The adverse effect of the deviation of a polarized component on measurement of an optical characteristic is prevented. A second measuring section determines group delay times of the incident light...
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7519242 |
Perimeter security system and perimeter monitoring method
A perimeter security system is disclosed which includes a first cable ( 40 ) and a second cable ( 60 ) buried beneath the ground in a zig-zag pattern. The first cable ( 40 ) has a first fibre ( 44...
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7518711 |
Optical waveform measurement apparatus and optical waveform measurement method
A first polarization controller controls a polarization state of measured light. A second polarization controller controls a polarization state of an optical sampling pulse. The measured light and...
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7518710 |
Optical devices for biological and chemical detection
A biological and chemical detection system is provided that detects and identifies biological and/or chemical particulates of interest. The biological and chemical detection system comprises a...
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7515276 |
High resolution interferometric optical frequency domain reflectometry (OFDR) beyond the laser coherence length
The technology described here enables the use of an inexpensive laser to measure an interferometric response of an optical device under test (DUT) at reflection lengths significantly greater than...
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7515273 |
Method for measuring the brillouin shift distribution along an optical fiber based on the optical demodulation of the signals, and relevant apparatus
The invention concerns a method for measuring the Brillouin shift distribution in optical fiber, comprising the launch of an optical pump signal from one end of the measurement fiber and an optical...
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7515265 |
Imaging systems and methods to improve backscattering imaging using circular polarization memory
An optical technique to improve the imaging of a target inside suspensions of scattering particles includes the illumination of the scattering particles with circularly polarized light. The...
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7515253 |
System for measuring a sample with a layer containing a periodic diffracting structure
To measure the critical dimensions and other parameters of a one- or two-dimensional diffracting structure of a film, the calculation may be simplified by first performing a measurement of the...
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7508524 |
Combined raman spectroscopy-optical coherence tomography (RS-OCT) system and applications of the same
An apparatus for evaluating a target of interest of a living subject. In one embodiment, the apparatus has a first light source for generating a broadband light, a second light source for...
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7508501 |
Method for measuring spectroscopic properties of bulk products and device for carrying out said method
The method for measuring spectroscopic properties of bulk products comprises portioned supplying of a sample in a measurement zone. In order to fully fill said measurement zone, several portions...
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