Class / Patent application number | Description | Number of patent applications / Date published |
356327000 | Having light polarizing means | 28 |
20080212091 | Light source unit and spectrum analyzer - A light source unit and a spectrum analyzer are provided in which the influence of interference can be reduced under conditions where light is separated into spectral components. A spectrum analyzer | 09-04-2008 |
20080239313 | ARRANGEMENT FOR AN OPTICAL SYSTEM FOR POLARIZATION-DEPENDENT, TIME-RESOLVED OPTICAL SPECTROSCOPY, OPTICAL MEASUREMENT SYSTEMS AND METHOD FOR THE POLARIZATION-DEPENDENT SPECTROSCOPIC ANALYSIS OF MEASUREMENT LIGHT - The invention is directed to an arrangement for an optical system for polarizalion-dependent, time-resolved optical spectroscopy, in particular a spectrometer that includes a polarization device which has a crystal polarizer and includes a light entry area which is arranged upstream of the polarization device and which is formed in such a way as to enclose a spatial acceptance angle of the crystal polarizer, and also that includes a light exit area which is arranged downstream of the polarization device, wherein an intermediate area which connects the light entry area and the light exit area is formed in the polarization device with a path length of at most approximately 4 mm which is traversed in the crystal polarizer by light impinging within the spatial acceptance angle. The invention also is directed to an optical measurement system comprising an arrangement, and also to a method for the polarization-dependent spectroscopic analysis of measurement light, in particular in time-resolved optical spectroscopy. | 10-02-2008 |
20090207407 | TWO-PHOTON-ABSORPTION DISPERSION SPECTROMETER - A tunable optical spectrometer includes a medium configured to perform polarization rotation within a frequency band on a linearly polarized test beam, wherein the medium is circularly birefringent, and wherein the polarization rotation is achieved based on two-photon-absorption. The medium includes a gaseous substance, a first reference laser beam having a first reference frequency, and a second reference laser beam having a second reference frequency, wherein the first reference laser beam and the second reference laser beam have a same circular polarization state. | 08-20-2009 |
20090323060 | SPECTRAL OPTICAL SENSOR AND METHOD FOR PRODUCING AN OPTICAL SPECTRAL SENSOR - The invention relates to an optical spectral sensor for determining the spectral information of incident light, in particular in the visible and infrared spectral range, with at least one optoelectronic semiconductor arrangement and at least one metal film, which is surrounded by a dielectric, wherein the metal film has a periodic pattern, wherein the at least one optoelectronic semiconductor arrangement and the at least one patterned metal film are arranged in such a way that light to be detected initially passes through the patterned metal film and then impinges on the optoelectronic semiconductor arrangement, wherein the optical spectral sensor is formed in such a way that the spectral sensitivity is determined essentially by the optical properties of the patterned metal film. | 12-31-2009 |
20100165340 | SPECTROSCOPIC SCATTEROMETER SYSTEM - Before the diffraction from a diffracting structure on a semiconductor wafer is measured, where necessary, the film thickness and index of refraction of the films underneath the structure are first measured using spectroscopic reflectometry or spectroscopic ellipsometry. A rigorous model is then used to calculate intensity or ellipsometric signatures of the diffracting structure. The diffracting structure is then measured using a spectroscopic scatterometer using polarized and broadband radiation to obtain an intensity or ellipsometric signature of the diffracting structure. Such signature is then matched with the signatures in the database to determine the grating shape parameters of the structure. | 07-01-2010 |
20100171952 | TWO-DIMENSIONAL FOURIER TRANSFORM SPECTROMETER - The present invention relates to a system and methods for acquiring two-dimensional Fourier transform (2D FT) spectra. Overlap of a collinear pulse pair and probe induce a molecular response which is collected by spectral dispersion of the signal modulated probe beam. Simultaneous collection of the molecular response, pulse timing and characteristics permit real time phasing and rapid acquisition of spectra. Full spectra are acquired as a function of pulse pair timings and numerically transformed to achieve the full frequency-frequency spectrum. This method demonstrates the ability to acquire information on molecular dynamics, couplings and structure in a simple apparatus. Multi-dimensional methods can be used for diagnostic and analytical measurements in the biological, biomedical, and chemical fields. | 07-08-2010 |
20100245819 | Method and apparatus for phase-compensated sensitivity-enhanced spectroscopy (PCSES) - A method and apparatus for convolving spectroscopic data with certain phase information for practicing phase-compensated sensitivity-enhanced spectroscopy (PCSES). PCSES uses a beam of radiation in a polarization state PS | 09-30-2010 |
20100277729 | Light focusing unit and spectrum measuring apparatus having the same - A light focusing unit and a spectrum measuring apparatus having the same are provided. The light focusing unit includes a light source section configured to emit light, a light guiding section configured to guide the light emitted from the light source section along multiple parallel light incidence paths, and a light focusing section configured to direct the light from the guiding section to be incident on a test position of a sample at different incidence angles. | 11-04-2010 |
20100321691 | MOLECULAR ANALYSIS - A spectrometer for analysing material comprises a light source, a monochromator for selecting a range of wave-lengths from the light source and emitting them as monochromatic light, a chamber for locating a sample, a focusing means for focusing the monochromatic light onto a sample in the chamber, a detector for measuring the monochromatic light after it has interacted with the sample. An independently variable parameter is varied between two values vi and v2, while the detector measures the monochromatic light across a range of is wavelengths, the independent variable having a value or values between v1 and v1+Δv, and Δv being much smaller than the interval between v1 and v2. | 12-23-2010 |
20110058166 | SPECTROSCOPE - The present invention provides a small spectroscope that has a short response time. A spectroscope according to one embodiment of the present invention includes: a beam deflector that includes an electro-optic crystal, having an electro-optic effect, and paired electrodes used to apply an electric field inside the electro-optic crystal; spectroscopic means for dispersing light output by the beam deflector; and wavelength selection means for selecting light having an arbitrary wavelength from the light dispersed and output by the spectroscopic means. | 03-10-2011 |
20110090499 | METHOD AND DEVICE FOR OPTICALLY EXAMINING THE INTERIOR OF TURBID MEDIA - A method for optically examining the interior of turbid media is provided. The method comprises the steps: providing broad-band light ( | 04-21-2011 |
20110170098 | POLARIMETRIC HYPERSPECTRAL IMAGER - A hyperspectral sensor or imager comprising a laser for illuminating a scene and a detector for detecting light emitted by the laser and transmitted through the scene, wherein the laser is a chirped laser arranged to output multiple pulses having different wavelength ranges, the multiple pulses being used to form an extended continuous spectrum for illuminating the scene. | 07-14-2011 |
20120200853 | SPECTROSCOPIC DEVICE - Disclosed is a spectroscopic device that includes a light input unit to which light from a light source is input; optical elements; an optical deflection element; a reflector element that reflects the light emitted from the optical deflection element; and a photodetector. The optical deflection element includes a refractive index change region made of a material having an electro-optical effect and electrodes arranged to pinch the refractive index change region. The reflector element is a resonator filter having wavelength selectivity such that light having a predetermined wavelength is resonantly reflected. | 08-09-2012 |
20120268740 | METHODS AND APPARATUS FOR VACUUM ULTRAVIOLET (VUV) OR SHORTER WAVELENGTH CIRCULAR DICHROISM SPECTROSCOPY - A highly efficient vacuum ultraviolet circular dichroism spectrometer is provided; the spectrometer suitable for laboratory use or for integration into a beam line at a synchrotron radiation facility. In one embodiment, a spectroscopic circular dichroism instrument is provided; the instrument configured so as to enable circular dichroism data to be simultaneously obtained for multiple wavelengths of light. The instrument may be further configured to operate in at least a portion of the vacuum ultraviolet wavelength region. | 10-25-2012 |
20120287433 | Reconfigurable Spectroscopic Ellipsometer - A Mueller ellipsometer of the type having a first rotating element on an incident beam side of a sample and a second rotating element on a reflected beam side of the sample and a detector having an integration time, having a controller for selectively and separately adjusting (1) a first angular frequency of the first rotating element and (2) a second angular frequency of the second rotating element. | 11-15-2012 |
20130063722 | SPECTROGRAPHIC POLARIMETER AND METHOD OF RECORDING STATE OF POLARITY - A single-shot real-time spectropolarimeter for use in astronomy and other sciences that captures and encodes some or all of the Stokes polarization parameters simultaneously using only static, robust optical components with no moving parts is described. The polarization information is encoded onto the spectrograph at each wavelength along the spatial dimension of the 2D output data array. The varying embodiments of the concept include both a two-Stokes implementation (in which any two of the three Stokes polarization parameters are measured) and a full Stokes implementation (in which all three of the Stokes polarization parameters are measured), each of which is provided in either single beam or dual beam forms. | 03-14-2013 |
20130258334 | Circular Dichroism Spectrometer Having Alignment Mechanism - A circular dichroism (CD) spectrometer includes an alignment mechanism that automatically adjusts the elements thereof at appropriate positions. The spectrometer has a focusing-lens position-and-orientation adjustment mechanism which adjusts the position and the orientation of the detector-side focusing lens. It also has a detector rotation mechanism which adjusts the orientation of the detector. Firstly, a control PC monitors the CD spectrum of D form of optical enantiomers, and the adjustment mechanism adjusts the focusing lens such that the monitored CD spectrum matches the reference spectrum related to the D form. Next, the control PC moniters CD spectrum of L form of optical enantiomers, and the adjustment mechanism adjusts the focusing lens such that the monitored CD spectrum of the D and L forms become symmetrical. And, the rotation mechanism adjusts the orientation of the detector such that the intensity of the detector signal is maximized. | 10-03-2013 |
20130321806 | IMAGE MAPPED SPECTROPOLARIMETRY - A method for imaging a sample, the method includes, during a single acquisition event, receiving a first polarization-encoded EM field for a first point and a second polarization-encoded EM field for a second point. The method further includes re-directing the first polarization-encoded EM field along a first pre-determined direction to a first location on a dispersing re-imager and the second polarization-encoded EM field along a second pre-determined direction to a second location on the dispersing re-imager. The method further includes spectrally dispersing the first polarization-encoded EM field to obtain a first spectrum, re-imaging the first spectrum onto a first location on a detector, spectrally dispersing the second polarization-encoded EM field to obtain a second spectrum, re-imaging the second spectrum onto a second location on the detector, and detecting the first re-imaged spectrum and the second re-imaged spectrum. | 12-05-2013 |
20140085634 | Multi-Function Spectrometer-On-Chip with a Single Detector Array - Various embodiments of apparatuses, systems and methods are described herein for a spectrometer comprising at least two dispersive elements configured to receive at least one input optical signal and generate two or more pluralities of spatially separated spectral components, at least a portion of the at least two dispersive elements being implemented on a first substrate; and a single detector array coupled to the at least two dispersive elements and configured to receive and measure two or more pluralities of narrowband optical signals derived from the two or more pluralities of spatially separated spectral components, respectively. | 03-27-2014 |
20140247449 | ATHERMAL CHANNELED SPECTROPOLARIMETER - A temperature insensitive (athermal) channeled spectropolarimeter (CSP) is described. The athermal CSP includes a crystal retarder formed of a biaxial crystal. The crystal retarder has three crystal axes, wherein each axis has its own distinct index of refraction. The axes are oriented in a particular manner, causing an amplitude modulating carrier frequency induced by the crystal retarder to be thermally invariant. Accordingly, a calibration beam technique can be used over a relatively wide range of ambient temperatures, with a common calibration data set. | 09-04-2014 |
20140327909 | METHOD FOR EXCITING A SUB-WAVELENGTH INCLUSION STRUCTURE - The invention concerns a method for exciting a sub-wavelength inclusion structure, comprising: providing a first medium having a first refractive index n | 11-06-2014 |
20150029507 | ALIGNMENT METHOD FOR OPTICAL AXES OF COMPOSITE WAVEPLATE - An alignment method for optical axes of a composite waveplate includes rotating a rotatable waveplate, which rotates about a central axis with respect to a fixed waveplate, and adjusting the rotation angle thereof until the differences between the spectral parameters of the composite waveplate and ideal spectral parameters are smaller than preset values. | 01-29-2015 |
20150300876 | SPECTROMETER FOR ANALYSING THE SPECTRUM OF A LIGHT BEAM - A spectrometer ( | 10-22-2015 |
20150308892 | Impulsive synchronization spectrometer based on adjustable time window - An impulsive synchronization spectrometer based on adjustable time window, includes a synchronous controller, a pulse light source, a high speed collection card, a computer system, a first photoelectric detector, a second photoelectric detector and a testing optical path system; wherein the synchronous controller has four output terminals. The first output terminal is connected with the pulse light source; and the second output terminal is connected with a computer; the third output terminal and the fourth output terminal are respectively connected with two channels of the high speed collection card and respectively output two-channel signals of a third synchronous signal and a fourth synchronous signal respectively serving as external triggering signals of the two channels to control signals in the two channels of the high speed collection card, the first photoelectric detector and the second photoelectric detector are respectively connected with the two channels of the high speed collection card. | 10-29-2015 |
20150308896 | METHODS AND APPARATUS FOR COAXIAL IMAGING OF MULTIPLE WAVELENGTHS - A hyperspectral/multispectral imager comprising a housing is provided. At least one light source is attached to the housing. An objective lens, in an optical communication path comprising originating and terminating ends, is further attached to the housing and causes light to (i) be backscattered by the tissue of a subject at the originating end and then (ii) pass through the objective lens to a beam steering element at the terminating end of the communication path inside the housing. The beam steering element has a plurality of operating modes each of which causes the element to be in optical communication with a different optical detector in a plurality of optical detectors offset from the optical communication path. Each respective detector filter in a plurality of detector filters covers a corresponding optical detector in the plurality of optical detectors thereby filtering light received by the corresponding detector from the beam steering element. | 10-29-2015 |
20160033328 | AMBIENT LIGHT ASSISTED SPECTROSCOPY - A spectroscopic device, which may be a handheld spectroscopic light source, which uses ambient light as a primary broadband light source, but which may be supplemented with an auxiliary light source to supplement band regions which may be deficient in the broad band source. The spectroscopic device makes use of a number of parallel control channels to monitor for sufficient light and to compensate for variations in the input light levels. | 02-04-2016 |
20160187198 | Spectral Analysis Device Based on Brillouin Dynamic Grating and Analysis Method Thereof - A spectroscopic analysis device based on Brillouin dynamic grating and its analysis method, which provides high resolution and large measuring range at the same time. The device includes a laser device ( | 06-30-2016 |
20170234732 | DEVICE AND METHOD FOR WAVELENGTH VARIATION OF AT LEAST ONE LIGHT SOURCE FOR DERIVATIVE SPECTROSCOPY | 08-17-2017 |