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| Number | Title | Issue Date |
| 8154731 | Method and a system for the assessment of samples The present invention offers an alternative strategy for the correlation of interference information to chemical and/or physical properties of a sample. This strategy can be implemented in a method and a system, which offer substantial technical and commercial advan... | 04/10/2012 |
| 8149415 | 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 differentiation of output light from a test cell to eliminate these constant or ... | 04/03/2012 |
| 8098379 | Planar lightwave fourier-transform spectrometer A transform spectrometer implemented on a planar waveguide circuit (PLC), having an input optical signal waveguide carrying an input optical signal to be analyzed; a plurality of couplers, each connected to the input optical signal waveguide, and each including a co... | 01/17/2012 |
| 8064064 | Apparatus and method for obtaining images using coherent anti-stokes Raman scattering Disclosed is an apparatus and method for obtaining images using coherent anti-stokes Raman scattering. The apparatus for obtaining images using coherent anti-stokes Raman scattering according to the present invention comprises: a pump light source and a stokes light... | 11/22/2011 |
| 8054466 | Spectroscopy wavelength and amplitude referencing system and method A spectroscopy wavelength and amplitude referencing system comprises an optical bench receiving a tunable optical signal from a tunable signal source, a wavelength reference detector on the bench for determining a wavelength of the tunable optical signal, an amplitu... | 11/08/2011 |
| 8023118 | Analyzer for absorption spectrometry of impurity concentration contained in liquid using exciting light The concentration of impurities contained in ultrapure water or press water can be efficiently analyzed with high precision. A portion of a liquid to be measured is introduced into an absorption spectrometric portion from a predetermined line. The liquid is irradiat... | 09/20/2011 |
| 8018597 | 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 processor for multi-line detection. The input optical assembly applies a... | 09/13/2011 |
| 8009295 | Chemical sensing with noise pre-compensation This invention relates generally to the systems and methods for chemicals detection such as explosives and others, and more particularly to optical devices and the methods of their use based on sensing of gases and residue materials. This sensing includes detection ... | 08/30/2011 |
| 8009294 | Chemical sensing system and method A photo-thermal, interferometric spectroscopy system is disclosed that provides information about a chemical, such as explosives and the like, at a remote location. It may be used for solid residue detection on a surface. The system includes a novel light detector s... | 08/30/2011 |
| 7995208 | 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 compensator without warping, bending or distorting the optics. This is acco... | 08/09/2011 |
| 7995207 | Spectral interferometry method and apparatus A spectral interferometry apparatus and method is provided to supply unambiguous profiles (A—scans free of mirror terms) of the reflectivity versus optical path difference and make difference between the positive and negative optical path difference or provide out... | 08/09/2011 |
| 7990540 | Apparatus and methods using highly optically dispersive media According to the invention, a highly optically dispersive medium is one in which the absolute value of the group index of refraction of the medium is equal to or greater than four. An optical spectroscopic parameter detection and/or measurement apparatus may be in t... | 08/02/2011 |
| 7973936 | Control system and apparatus for use with ultra-fast laser A control system and apparatus for use with an ultra-fast laser is provided. In another aspect of the present invention, the apparatus includes a laser, pulse shaper, detection device and control system. A multiphoton intrapulse interference method is used to charac... | 07/05/2011 |
| 7916300 | Spectroscopy device, spectroscopy apparatus and spectroscopy method A spectroscopy device that separates input light into a plurality of wavelength ranges. A metal body has a hole or aperture which is open on the upper side. The hole or aperture is formed in a polygonal shape having at least a pair of opposite faces not parallel to ... | 03/29/2011 |
| 7903253 | Microscope A microscope comprising: a light sampler for collecting light from a measurement area of a sample; a multi-element detector having a plurality of photoelectric elements, for detecting the light collected by the light sampler, each photoelectric element corresponding... | 03/08/2011 |
| 7903252 | Noise cancellation in fourier transform spectrophotometry Increasing signal to noise ratio in optical spectra obtained by spectrophotometers. An interferometer introduces interference effects into a source light beam. A dual beam configuration splits the source beam having the interference effects into a reference beam and... | 03/08/2011 |
| 7889348 | Arrangements and methods for facilitating photoluminescence imaging Exemplary systems and methods for obtaining a photoluminescence radiation from at least one portion of a sample can be provided. For example, using the exemplary embodiment, it is possible to receive a first radiation and disperse the first radiation into at least o... | 02/15/2011 |
| 7889349 | Method and apparatus for improvement of spectrometer stability, and multivariate calibration transfer The present invention provides improved methods and apparatuses for accurate measurements using interferometers. A functional relationship between the optical path difference and time is determined from a reference signal from an interferometer. The times at which t... | 02/15/2011 |
| 7869050 | Systems and methods for comparative interferogram spectrometry A method for determining a background noise level includes receiving interferogram data; determining at least one measure of interferogram quality; accumulating said received interferogram data; and generating a background noise level based on said interferogram dat... | 01/11/2011 |
| 7855788 | Spectroscopy method and spectroscope To achieve an apparatus capable of measuring a light absorption coefficient f a sample with high sensitivity. A ring down spectroscope uses a wavelength-variable femtosecond soliton pulse light source 1. Pulse light is input to a loop optical fiber 6 t... | 12/21/2010 |
| 7826061 | High-speed spectrographic sensor for internal combustion engines A high-speed absorption spectrographic system employs a slit-less spectroscope to obtain high-resolution, high-speed spectrographic data of combustion gases in an internal combustion engine allowing precise measurement of gas parameters including temperature and spe... | 11/02/2010 |
| 7812958 | 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 function of local intensity of an electromagnetic wave, detection bei... | 10/12/2010 |
| 7796268 | 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 that may be analyzed to extract the transmitted data. The incident tra... | 09/14/2010 |
| 7773229 | Doppler asymmetric spatial heterodyne spectroscopy A Doppler Asymmetric Spatial Heterodyne (DASH) spectrometer includes an input aperture for receiving an input light; a collimating lens for collimating the input light into a collimated light; offset establishing means, including at least one grating, for i) receivi... | 08/10/2010 |
| 7764383 | Adaptively determining the sign in a fringe count detection system A method includes extracting phase due to fringe count error (FCE) in spectra formed by an interferometer. The exemplary method includes the steps of: (a) forming an earth scene spectrum; (b) forming a background reference spectrum; and (c) forming a phase extractio... | 07/27/2010 |
| 7733492 | Sagnac fourier transform spectrometer having improved resolution Systems and methods are disclosed for a modified Sagnac interferometer having a plurality of gratings that can be reflective or transmissive. The gratings allow measurement of wavelength spectra in counter-circulating beams of the interferometer. In one embodiment, ... | 06/08/2010 |
| 7667848 | Imaging apparatus for infrared rays nonlinear molecular vibrational microscopy Disclosed is an imaging apparatus for infrared nonlinear molecular vibrational microscopy. ... | 02/23/2010 |
| 7652769 | Method and apparatus for assessing purity of vegetable oils by means of terahertz time-domain spectroscopy The present invention relates to a method for assessing the purity of vegetable oils by means of THz time-domain spectroscopy, comprising the steps of: measuring the THz time-domain spectra of standard vegetable oils to establish a spectral database; measuring the T... | 01/26/2010 |
| 7633625 | Spectroscopic ellipsometer and polarimeter systems A rotating compensator spectroscopic ellipsometer or polarimeter system having a source of a polychromatic beam of electromagnetic radiation, a polarizer, a stage for supporting a material system, an analyzer, a dispersive optics and a detector system which comprise... | 12/15/2009 |
| 7630081 | Interferometer maintaining optical relationship between elements An interferometer for Fourier transform infrared spectroscopy includes a fixed assembly including a housing, a beam splitter, and a mirror fixedly positioned relative to each other. A movable assembly includes a housing, a mirror, and a motor coil, fixedly positione... | 12/08/2009 |
| 7619742 | High-speed spectrographic sensor for internal combustion engines A high-speed absorption spectrographic system employs a slit-less spectroscope to obtain high-resolution, high-speed spectrographic data of combustion gases in an internal combustion engine allowing precise measurement of gas parameters including temperature and spe... | 11/17/2009 |
| 7616319 | Spectroscopic ellipsometer and polarimeter systems A rotating compensator spectroscopic ellipsometer or polarimeter system having a source of a polychromatic beam of electromagnetic radiation, a polarizer, a stage for supporting a material system, an analyzer, a dispersive optics and a detector system which comprise... | 11/10/2009 |
| 7609383 | Optical spectrum analyzer An optical spectrum analyzer detects a light output that is dependent on the frequency of light in a wavelength range of light to be measured. The optical spectrum analyzer includes a waveguide acousto-optic tunable filter including a piezoelectric substrate, optica... | 10/27/2009 |
| 7595886 | Wavelength monitor using interference signals A wavelength monitor includes the following elements. An optical divider divides a beam of measured light into first and second divided beams of measured light. An interfering element converts the first and second divided beams of measured light into first and secon... | 09/29/2009 |
| 7595887 | Multigas monitoring and detection system A spectroscopic detection system is described for monitoring ambient air for toxic chemical substances. The system can be a compact, portable multiple gas analyzer capable of detecting and discriminating a broad range of chemical constituents including various nerve... | 09/29/2009 |
| 7593112 | Systems and methods for comparative interferogram spectrometry A system for comparative interferogram spectrometry includes an interferometer configured to generate interferograms from incident radiation from a target region, an interferogram database containing stored interferograms, and a processing subsystem configured to re... | 09/22/2009 |
| 7586618 | Distinguishing non-resonant four-wave-mixing noise in coherent stokes and anti-stokes Raman scattering A method of examining a sample comprises exposing the sample to a pump pulse of electromagnetic radiation for a first period of time, exposing the sample to a stimulant pulse of electromagnetic radiation for a second period of time which overlaps in time with at lea... | 09/08/2009 |
| 7573577 | Spatial heterodyne wide-field Coherent Anti-Stokes Raman spectromicroscopy Methods for chemically-resolved optical microscopy are presented. The methods can provide a wide-field, spatial interference imaging using multiple nonlinear scattering channels to produce multiple, spatially coherent anti-Stokes Raman scattering (CARS). ... | 08/11/2009 |
| 7564560 | Spectrophotometer with wide inlet slit A spectrophotometer incorporating an interferometer and a dispersive system is adapted to have an enlarged inlet field without degrading its spatial resolution. To this end, spectral data deduced horn measurements performed by means of the interferometer are transfe... | 07/21/2009 |
| 7564561 | Method of optical frequency measurement A method of absolute optical frequency measurement is realized by using mode-locked laser frequency combs to measure the optical frequency of an unknown laser. By varying the repetition frequency, the relative frequency location of the unknown laser to the beating c... | 07/21/2009 |
