Matches 1 - 50 out of 231 1 2 3 4 5 >


Match Document Document Title
US20150168625 CURVED VOLUME PHASE HOLOGRAPHIC (VPH) DIFFRACTION GRATING WITH TILTED FRINGES AND SPECTROGRAPHS USING SAME  
The subject matter described herein includes a curved VPH grating with tilted fringes and spectrographs, both retroreflective and transmissive, that use such gratings. A VPH grating according to...
US20120274943 FIZEAU REFERENCE ARM USING A CHIRPED FIBER BRAGG GRATING  
An improved interferometer measurement system is presented. In a preferred embodiment, a chirped fiber Bragg grating is used as a reference surface in a Fizeau interferometer arrangement for...
US20140098371 Fourier transform micro spectrometer based on spatially-shifted interferogram bursts  
A spectrometer with improved resolution includes a spectral domain modulator having a periodic response in the spectral domain to modulate a wideband source spectrum and cause one or more shifted...
US20120287439 Interferometer and Fourier Spectrometer using same  
Provided is a small, highly accurate Fourier spectrometer which enables highly accurate detection of an optical path difference in an interferometer. An element for changing to a narrow band is...
US20100177309 MODULAR SPECTROSCOPY LABORATORY  
A modular spectroscopy laboratory (MSL), comprises a rigid case with a flashlamp rotatably mounted in said case. A sample holder is provided for holding a sample of solution for analysis, and a...
US20100315648 NON-PERIODIC WAVEFRONT DIVIDING INTERFEROMETER  
A non-periodic reflection beamsplitter or reflector for use in an interferometer. The interferometer employs non-periodic reflectors or a non-periodic beamsplitter in order to produce interference...
US20150116720 COMPACT SPECTROMETER FOR TWO-DIMENSIONAL SAMPLING  
The present invention relates to a spectrometer including a diopter (11); capturing means (15, 18) at said diopter (11) of an interferogram (12) originating from two interference beams (F1, F2)...
US20100033728 MONOLITHIC INTERFEROMETER WITH OPTICS OF DIFFERENT MATERIAL  
A monolithic frame for optics used in interferometers where the material of the monolithic frame may have a substantially different coefficient of thermal expansion from the beamsplitter and...
US20140368824 FOURIER-TRANSFORM INTERFEROMETER WITH SELF-APODIZATION COMPENSATION  
A Fourier-transform interferometer with self-apodization compensation comprises at least one pair of mobile prisms forming a plate with thickness which varies at the same time as an optical path...
US20110299089 COMPACT LIQUID CRYSTAL BASED FOURIER TRANSFORM SPECTROMETER SYSTEM  
Systems and methods for a compact Fourier transform spectrometer. A cell having two transparent walls and containing a liquid crystal medium is placed in a light beam. Applying a voltage across...
US20120212731 MULTIPLE WAVELENGTH CAVITY RING-DOWN SPECTROSCOPY  
Described are methods for multi-wavelength cavity ring-down spectroscopy; comprising simultaneously and continuously irradiating an optical cavity with light at two or more different wavelengths,...
US20110261365 OPTICAL SPECTROSCOPY DEVICE INCLUDING A PLURALITY OF EMISSION SOURCES  
The invention relates to a wavelength spectroscopy device comprising, on a substrate a filter cell CF constituted by two mirrors separated by a spacer membrane, the filter cell being made up of a...
US20140268163 Methods and Apparatus Related to Multi Wavelength Photothermal Optical Coherence Tomography  
Embodiments of the invention include apparatus and methods of non-invasively detecting one or more constituents of a target using multiple wavelength photothermal optical coherence tomography.
US20100284017 Miniature Fourier Transform Spectrometer and Method of Operation  
A Micro-Electro-Mechanical Systems (MEMS) interferometer is implemented in a Fourier transform spectrometer, which includes a common housing containing the interferometer and a gas cell, possibly...
US20120086946 SAGNAC FOURIER TRANSFORM SPECTROMETER HAVING IMPROVED RESOLUTION  
A Sagnac interferometer can include a beamsplitter arranged to receive an input beam of light of a design wavelength, to split the input beam of light into first and second beams that counter...
US20100315632 OPTICAL APPARATUS FOR COMBINED HIGH WAVENUMBER RAMAN SPECTROSCOPY AND SPECTRAL DOMAIN OPTICAL COHERENCE TOMOGRAPHY  
The present invention provides apparatuses and methods for sample analysis, such as tissue analysis, that integrate high wavenumber (HW) Raman spectroscopy for chemical composition analysis and...
US20110139990 MEMS-BASED FTIR SPECTROMETER  
A MEMS-based Fourier Transform (FT) spectrometer is provided. According to an embodiment, the MEMS-based FT spectrometer is an FT infrared (FTIR) spectrometer. The FT spectrometer can include a...
US20110032529 UNIVERSAL WAVELENGTH CALIBRATION SOURCE USING A STABLE MONOLITHIC INTERFEROMETER  
Calibration of an arbitrary spectrometer can use a stable monolithic interferometer as a wavelength calibration standard. Light from a polychromatic light source is input to the monolithic...
US20110058177 MARKER-FREE CHROMOSOME SCREENING  
The present invention relates to a method for analyzing chromosomes by preparing a chromosome preparation, measuring at least one interference property of the chromosome preparation and...
US20120253721 DETERMINING CHARACTERISTICS OF ULTRASHORT PULSES  
Various systems and methods for analysis of optical pulses are provided. In one embodiment, a method is provided including obtaining a plurality of traces produced by propagating an unknown pulse...
US20130038880 INTERROGATION OF WAVELENGTH-SPECIFIC DEVICES  
An apparatus for interrogating wavelength-specific devices has a broadband optical source to illuminate an interferometer which provides a low coherence temporal interferogram. At least one array...
US20130135614 DUAL WINDOW PROCESSING SCHEMES FOR SPECTROSCOPIC OPTICAL COHERENCE TOMOGRAPHY (OCT) AND FOURIER DOMAIN LOW COHERENCE INTERFEROMETRY  
Current apparatuses and methods for analysis of spectroscopic optical coherence tomography (SOCT) signals suffer from an inherent tradeoff between time (depth) and frequency (wavelength)...
US20080130008 Interferential Spectroscopy Detector and Camera  
An interferential spectroscopy detector including a waveguide having an input side and a mirror on an opposite side, and means for detecting electromagnetic rays delivering an electric signal as a...
US20090219543 CONTRA-PROPAGATIVE WAVE SPECTOGRAPH  
The invention relates to a spectrograph (11) comprising a waveguide (10) provided with accesses (10; 10b, 12), a means for injecting two guided contra-propagative waves by each accesses in such a...
US20120133948 SPECTROMETER  
A spectrometer includes: a tungsten lamp which emits light with no peak wavelength within a wavelength range of visible light and having a light amount increasing as the wavelength becomes longer;...
US20130222809 METHOD OF CORRECTING TILT IN SPECTROSCOPE  
In a rough adjustment step before spectroscopic analysis, a moving mirror is moved (#1), the outputs of division elements when the interfering light of reflected light off the moving mirror and...
US20090046293 Optical Communications Using Spectral Interferometry  
Optical communications can be performed using spectral interferometry. An incident transmission pulse or beam may be mixed with a locally generated beam or pulse to create an interference pattern...
US20140014841 DIRECT AND QUANTITATIVE BROADBAND ABSORPTANCE SPECTROSCOPY WITH MULTILAYER CANTILEVER PROBES  
A system for measuring the absorption spectrum of a sample is provided that includes a broadband light source that produces broadband light defined within a range of an absorptance spectrum. An...
US20080204757 Handheld FT-IR spectrometer  
Novel spectrometer arrangements are described. They may employ a resin-based preconcentration system to sample chemical vapors. A field-widened interferometer modulates radiant energy. The signal...
US20130286402 REFERENCING OF THE BEATING SPECTRA OF FREQUENCY COMBS  
There is provided a method for referencing and correcting the beating spectrum generated by the interference of the components of a frequency comb source. The proposed method allows monitoring of...
US20110043815 Referencing of the Beating Spectra of Frequency Combs  
There is provided a method for referencing and correcting the beating spectrum generated by the interference of the components of a frequency comb source. The proposed method allows monitoring of...
US20130107269 ELECTRIC FIELD SPECTRUM MEASUREMENT DEVICE AND OBJECT MEASUREMENT DEVICE  
Every depth of the measurement object measures energy structural information, refractive index, transmittance, reflectance other than property information of (as for the resolution several...
US20140092385 DISPERSED FOURIER TRANSFORM SPECTROMETER, METHODS AND SYSTEMS  
A spectrometer is provided, the spectrometer having an interferometer generating an interferogram by splitting an interferometer input signal between a reference arm and a variable delay arm, and...
US20110261363 FOURIER TRANSFORM SPECTROMETER WITH A FREQUENCY COMB LIGHT SOURCE  
An embodiment relates to a Fourier transform spectrometer comprising: a coherent light source; an interferometer adapted to separate the coherent light source into two or more parts in order to...
US20080304074 OPTICAL CATHETER CONFIGURATIONS COMBINING RAMAN SPECTROSCOPY WITH OPTICAL FIBER-BASED LOW COHERENCE REFLECTOMETRY  
The present invention provides apparatuses and methods for sample analysis, such as tissue analysis, that integrate high wavenumber (HW) Raman spectroscopy for chemical composition analysis and...
US20090316159 SLAB WAVEGUIDE SPATIAL HETERODYNE SPECTROMETER ASSEMBLY  
An optical broadband micro-spectrometer containing an input optical assembly, a group of slab waveguide spatial heterodyne spectrometer (SHS) integrated circuits (ICs), a detection module and a...
US20100002737 Electronically controlled optical scanning  
A device for generating light pulses that are separated in terms of time has a light source that emits a sequence of light pulses. A regulation signal is formed within a regulation circuit from a...
US20110188046 Background-Free Absorption Spectroscopy Using Spectral Differentiator  
An absorption spectrometer provides improved rejection of background radiation signal by employing a frequency-swept laser signal without frequency dithering and performing an effective...
US20070165215 Contactless corrosion sensor  
A corrosion sensor having a bean-splitting interferometer, a spectrometer and an analyzer, wherein said corrosion sensor is a contactless corrosion sensor configured to scan a sample comprising...
US20150022817 PROFILOMETER WITH PARTIAL COHERENCE INTERFEROMETER ADAPTED FOR AVOIDING...  
A profilometer incorporating a partial coherence interferometer directs a beam containing a band of wavelengths along object and reference arms of the interferometer into respective engagements...
US20150159990 VARIABLE-FREQUENCY OPTICAL COMBS, HETERODYNE SENSOR, AND PROCESS FOR PERFORMING SPECTROSCOPY  
A comb source includes a continuous wave frequency source to provide a continuous wave radiation; a first modulator in optical communication with the continuous wave frequency source; a second...
US20060238768 Fourier transform infrared spectrometer  
A method and apparatus for measuring radiometric signals. An infrared energy signal is directed through a sample and combined with a selected signal to reduce the effect of analog-to-digital...
US20150036145 Twin-focus photothermal correlation spectroscopy method and device for the characterization of dynamical processes in liquids and biomaterials with the help of absorbing markers  
The invention relates to a method and a device for twin-focus photothermal correlation spectroscopy for the characterization of dynamical processes in liquids and biomaterials with the help of...
US20140192363 SPECTROSCOPY ASSEMBLY  
A spectroscopy assembly having a first and a second optical ring resonator, each provided with a material having an intensity-dependent refraction index. The spectroscopy assembly further includes...
US20100256938 Method And Device For Interferometric Inversion With Free Sampling  
The invention relates according to a first aspect to an interferometric inversion method for measuring a characteristic variable of a radiation source and/or of a medium through which the...
US20150241280 Folded Spatial Heterodyne Spectrometer  
A technique and device to determine the spectrum of electromagnetic radiation in a certain range of wavelengths comprising: splitting said radiation into more than one beam; and imprinting a...
US20070159636 Fabry-perot semiconductor tunable laser  
A tunable laser according to the present invention includes a plurality of Fabry-Perot semiconductor lasers comprising a plurality of semiconductor gain medium compositions disposed on a common...
US20150168217 METHODS AND APPARATUS FOR SPECTROMETRY  
Multimode interference can be used to achieve ultra-high resolving powers (e.g., Q>105) with linewidths down to 10 pm at 1500 nm and a broad spectroscopy range (e.g., 400-2400 nm) within a...
US20110051143 ASE Swept Source with Self-Tracking Filter for OCT Medical Imaging  
An integrated swept wavelength tunable optical source uses a narrowband filtered broadband signal with an optical amplifier and self-tracking filter. This source comprises a micro optical bench, a...
US20060170928 Masila's cancer detector based on optical analysis of body fluids  
An apparatus for optical analysis of body fluids for cancer detection comprising: a light source for generating light rays,(incoherent lamp or laser) an excitation wavelength determination means,...

Matches 1 - 50 out of 231 1 2 3 4 5 >