Spectroscopy Patents (Class 356/451)
  • Patent number: 10436643
    Abstract: A spectrometer includes a grating, a cylinder retainer and a housing. The grating comprises a grating surface having a concave toroidal form. The retainer comprises an end surface having a convex contact surface compatible with the grating surface, wherein the contact surface contacts with the grating surface. The housing includes an opening which the retainer fits in.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: October 8, 2019
    Inventor: Masaaki Kitawaki
  • Patent number: 10371557
    Abstract: A FMCW fill level sensor comprising an equalizer that equalizes the intermediate frequency signal digitalized by an analog-digital converter. Equalizing is carried out, for example, in the form of convoluting the digitalized intermediate frequency signal by an equalizing function in the time domain. It is also possible to equalize the digitalized intermediate frequency signal by multiplying the signal by an equalizing function in the form of a transfer function G(?k) to form the discrete frequency in the frequency domain. A digital filter can also be used. This can increase the accuracy with which the fill level is determined.
    Type: Grant
    Filed: April 2, 2014
    Date of Patent: August 6, 2019
    Inventors: Michael Fischer, Roland Welle, Karl Griessbaum
  • Patent number: 10317283
    Abstract: A method for measuring spectrum by Fourier-transforming an interferogram of an infrared interference wave acquired with an interferometer, including a step of over-sampling intensity signals of the interference wave at positions (D1, D2, . . . ) of a movable mirror set on the basis of a wavelength ?1 of a semi-conductor laser, and a step of interpolating intensity signals (I1?, I2?, . . . ) that would be obtained when the interference wave is sampled at positions (D1?, D2?, . . . ) of the movable mirror set on the basis of a wavelength ?0 of a He—Ne laser, by using the over-sampled intensity signals (I1, I2, . . . ), for calculating the spectrum with the interferogram based on the interpolated intensity signals (I1?, I2?, . . . ) and for an efficient use of conventional stored spectrum data which are measured based on the wavelength ?0.
    Type: Grant
    Filed: February 2, 2017
    Date of Patent: June 11, 2019
    Inventors: Tetsuji Sunami, Takashi Shimamura, Norio Wakimoto, Jun Koshobu
  • Patent number: 10247608
    Abstract: A method of controlling a spectroscopic module that includes a measurement light source, a variable-wavelength optical filter, a photodiode, and a conversion circuit for converting a drive signal voltage into a gap displacement amount. The spectroscopic module has a reference light source for emitting a reference light beam of a known wavelength. The controlling method involves varying a gap for the incident reference light beam, extracting two maximum points among data output from the photodiode, and updating a first conversion formula provided in the conversion circuit through use of drive signal voltages and gap amounts corresponding to the two points.
    Type: Grant
    Filed: April 26, 2016
    Date of Patent: April 2, 2019
    Assignee: Panasonic Corporation
    Inventors: Soichiro Hiraoka, Masaya Nakatani
  • Patent number: 10240918
    Abstract: A method for studying a zone of an object, the zone exhibiting a mass-thickness and comprising at least one chemical element, the method including a step of exposing a part of the zone of the object to an electron beam, a step of identifying each chemical element present in the said zone by virtue of the exposure step, a step of measuring, for each chemical element identified, a corresponding intensity of an X-ray radiation emergent from the object on account of the said exposure step, a step of determining a value of the said mass-thickness dependent on each measurement step, and a step of determining a value of the concentration of each chemical element identified using the said value of the mass-thickness determined.
    Type: Grant
    Filed: December 11, 2015
    Date of Patent: March 26, 2019
    Inventor: Eric Robin
  • Patent number: 10209322
    Abstract: A method for testing a local magnetomechanical coupling coefficient of a magnetic material includes defining a square of a local magnetomechanical coupling coefficient kIT as a the ratio of a magnetic energy stored in a magnetic material to an input reversible mechanical work, and characterizing the local magnetomechanical coupling coefficient of the magnetic material by measuring nano-indentation load-depth curves of the magnetic material under both situations of a saturated magnetic field and an unsaturated magnetic field. The method is simple in operation and has the advantages in local performance test of composite materials and other heterogeneous materials and also in small-scale performance test of nano-films.
    Type: Grant
    Filed: May 18, 2015
    Date of Patent: February 19, 2019
    Assignee: Peking University
    Inventors: Daining Fang, Hao Zhou, Yongmao Pei, Hongwei Zhao
  • Patent number: 10197534
    Abstract: Disclosed are a method and a device for testing a defect based on an ultrasonic Lamb wave tomography. The method includes: partitioning an imaging area of a material to be tested into grids; exciting electromagnetic acoustic transducers for emitting to emit Lamb waves with a A0 mode in all directions, and electromagnetic acoustic transducers for receiving to receive the Lamb waves; obtaining a time-frequency analysis result and recording time-of-flights of testing waves; determining a first slowness of each grid to obtain a first defect area; establishing an extrapolation formula according to the first defect area, and iterating the extrapolation formula to trace and revise paths of the Lamb waves until a better imaging precision is obtained.
    Type: Grant
    Filed: November 23, 2015
    Date of Patent: February 5, 2019
    Inventors: Songling Huang, Shen Wang, Wei Zhao, Shisong Li, Zheng Wei
  • Patent number: 10193620
    Abstract: Using pump-probe measurements on multi-span optical links may result in the determination of one or more of the following: 1) wavelength-dependent power profile and gain evolution along the optical link; 2) wavelength-dependent dispersion map; and 3) location of regions of high polarization-dependent loss (PDL) and polarization-mode dispersion (PMD). Such measurements may be a useful diagnostic for maintenance and upgrade activities on deployed cables as well as for commissioning new cables.
    Type: Grant
    Filed: April 15, 2018
    Date of Patent: January 29, 2019
    Assignee: Ciena Corporation
    Inventors: Andrew D. Shiner, Michael Andrew Reimer, Maurice O'Sullivan, Andrzej Borowiec
  • Patent number: 10161885
    Abstract: A measurement system for use in measuring parameters of a patterned sample is presented. The system comprises: a broadband light source; an optical system configured as an interferometric system; a detection unit; and a control unit. The interferometric system defines illumination and detection channels having a sample arm and a reference arm comprising a reference reflector, and is configured for inducing an optical path difference between the sample and reference arms; the detection unit comprises a configured and operable for detecting a combined light beam formed by a light beam reflected from said reflector and a light beam propagating from a sample's support, and generating measured data indicative of spectral interference pattern formed by at least two spectral interference signatures. The control unit is configured and operable for receiving the measured data and applying a model-based processing to the spectral interference pattern for determining one or more parameters of the pattern in the sample.
    Type: Grant
    Filed: April 12, 2015
    Date of Patent: December 25, 2018
    Inventors: Gilad Barak, Danny Grossman, Dror Shafir, Yoav Berlatzky, Yanir Hainick
  • Patent number: 10151627
    Abstract: A photonics system includes a transmit photonics module and a receive photonics module. The photonics system also includes a transmit waveguide coupled to the transmit photonics module, a first optical switch integrated with the transmit waveguide, and a diagnostics waveguide optically coupled to the first optical switch. The photonics system further includes a receive waveguide coupled to the receive photonics module and a second optical switch integrated with the receive waveguide and optically coupled to the diagnostics waveguide.
    Type: Grant
    Filed: December 9, 2015
    Date of Patent: December 11, 2018
    Assignee: Skorpios Technologies, Inc.
    Inventors: Robert J. Stone, Stephen B. Krasulick
  • Patent number: 10132686
    Abstract: A spectroscopic device is disclosed. The spectroscopic device can include a beam collimation structure with a white light source. The beam collimation structure can also include a lens configured to generate a collimated light beam. The spectroscopic device can also include a polarization modulation structure. The polarization modulation structure can convert the collimated light beam into a common path light beam. The common path light beam can include a delayed component and a polarized component. The spectroscopic device can include a dual spectrum sensing structure. The dual spectrum sensing structure can sense a normalized spectral Stokes vector in real time speed.
    Type: Grant
    Filed: September 12, 2016
    Date of Patent: November 20, 2018
    Assignees: Industrial Cooperation Foundation Chonbuk National University, Board of Regents, The University of Texas System
    Inventors: Daesuk Kim, Robert Magnusson
  • Patent number: 10119861
    Abstract: The present invention relates to a lamella grating interferometer capable of being employed in a Fourier transform infrared (FTIR) spectrometer, the interferometer including a reflective surface in a circular shape and provided with a fixed portion including fixed mirrors and a movable portion including movable mirrors that are arranged with the fixed mirrors in a crossing manner to form a lamella structure with the fixed mirrors, a plurality of driving units disposed at outside the reflective surface and configured to apply driving forces for moving the movable portion, and a plurality of driving arms connecting the driving units to the movable portion of the reflective surface, respectively, and configured to move the movable portion in response to the driving forces applied by the driving units, wherein each of the plurality of driving arms is formed in a structure of repeating a preset bent shape plural times.
    Type: Grant
    Filed: July 19, 2017
    Date of Patent: November 6, 2018
    Inventors: Jaehwan Lee, Youngil Kang, Jongmin Lee, Incheol Kim, Dohyun Park
  • Patent number: 10113859
    Abstract: An OCT imaging technique capable of suppressing image noise due to reflection on a wall surface of a carrier for carrying an imaging object by a simple configuration is provided. A light regulating member 28 having a transmission pattern where the high transmission parts P1 and the low transmission parts P2 are alternately arranged is placed on a side opposite to the spheroid Sp (imaging object) across the objective lens 27. The transmission pattern is rotationally symmetric with respect to an optical axis AX of the objective lens 27 and a point located at a position point-symmetric with an arbitrary point in the high transmission part with respect to a point where the optical axis of the objective lens intersects with the light regulating surface is included in the low transmission part.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: October 30, 2018
    Assignee: Screen Holdings Co., Ltd.
    Inventors: Kenji Ueyama, Kumiko Fukue
  • Patent number: 10101206
    Abstract: An imaging system and method are presents for use in reconstructing spectral data of an object. The imaging system comprises: an optical unit; a pixel array of a detector; and a data processor for receiving and processing image data indicative of light detected by the pixel array and generating reconstructed spectral data of the object being imaged. The optical unit is configured and operable for applying a predetermined coding to an input light field while creating an optical image thereof on a detection plane defined by the pixel array. Therefore, the image data is a function of the predetermined coding and a spectrum of the object to be determined.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: October 16, 2018
    Inventors: Ran Schleyen, Ariel Raz, David Mendlovic
  • Patent number: 10066992
    Abstract: The present invention is adapted to make light beams emitted from a light source enter a photodetector both when interposing an optical element having known characteristics and when not interposing the optical element, and acquire a first output value and a second output value that are the output values of the photodetector with respect to each of light beams that respectively have predetermined multiple wavenumbers and are included in the incident light beams, and obtain an arithmetic expression for calculating intensity of incident light beams from an output value of the photodetector, using parameters that are a ratio between the first output value and the second output value at each of the predetermined wavenumbers and the wavenumber transmission or reflection characteristic of the optical element.
    Type: Grant
    Filed: July 25, 2016
    Date of Patent: September 4, 2018
    Assignee: Horiba, Ltd.
    Inventors: Yoshitake Ando, Katsumi Nishimura, Yukio Sakai
  • Patent number: 10060958
    Abstract: A testing method or apparatus utilizes a filter or modifier to measure time varying or dynamic harmonic, intermodulation, cross modulation, and or N-Beat or triple distortion from a device. With a stairstep or arbitrary signal and another signal, Nth order harmonic, cross modulation, triple beat, N-Beat, and or intermodulation distortion is measured via the filter or modifier at different offsets or time provided by an arbitrary low frequency signal. For example, an amplifier with crossover distortion will show increased (e.g., time varying) harmonic, cross modulation, triple beat, and or intermodulation distortion near the zero crossing while providing less distortion in other portions of the transfer curve of the amplifier. One or more distortion signals from the device (e.g., audio device) may be measured for a phase and or frequency modulation effect.
    Type: Grant
    Filed: August 3, 2017
    Date of Patent: August 28, 2018
    Inventor: Ronald Quan
  • Patent number: 10054484
    Abstract: The invention relates to a measuring arrangement for detecting an absolute reflection spectrum of a sample in a process for producing the sample. It comprises a light source for generating measurement light, a homogenizer for generating a uniform spatial illuminance distribution of the measurement light; a movable reflector and a receiver for collecting the measurement light reflected from the sample and/or the reflector. According to the invention, the reflector both for a reference measurement and for a sample measurement is positioned in an observation beam path and arranged on the same side of the sample as the light source in order to feed the reflected measurement light to the receiver.
    Type: Grant
    Filed: June 22, 2015
    Date of Patent: August 21, 2018
    Inventors: Jörg Margraf, Jens Mondry
  • Patent number: 10032384
    Abstract: A location marker that may be used to provide information to a vehicle, such as an unmanned aerial vehicle (UAV). The location marker may include a plurality of retroreflectors that may form a pattern readable by a vehicle or other device. The pattern may be read to extract an identifier of a location, such as an address or an identifier of a person. A global positioning system (GPS) device may transmit a general location of the location marker to the vehicle, while the location marker may provide a unique visual location identifier to a device within visual range of the location marker. In some embodiments, the location marker may also include lights that may be individually sequenced on and off at different times to create a time domain signal sequence that is readable by the vehicle.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: July 24, 2018
    Assignee: Amazon Technologies, Inc.
    Inventors: Scott Patrick Boyd, Chengwu Cui, Sarah Graber, Barry James O'Brien, Joshua John Watson, Scott Michael Wilcox
  • Patent number: 10001363
    Abstract: Provided is a common-path optical fiber-based handheld parallel optical coherence tomography (OCT) apparatus, including a probe configured to receive the light from a broadband light source and illuminate a measurement target, wherein the probe may include an inner space through which the light passes, a collimator configured to collimate the light incident to the inner space, a diffraction grating configured to diffract the light having passed through the collimator, a galvanometer scanner configured to reflect the light having passed through the diffraction grating, an objective lens configured to concentrate the reflected light on a focal point, and an interferer configured to acquire an interfered light by reflecting at least a portion of the light having passed through the objective lens.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: June 19, 2018
    Assignee: Korea Basic Science Institute
    Inventors: Kye Sung Lee, Gun Hee Kim, Hwan Hur, I Jong Kim, Ki Soo Chang
  • Patent number: 10001408
    Abstract: A method and a device for measuring absorbed energy-momentum symmetry in which radiant energy W·sr?1·m?2·nm?1 is compared directly against its absorbed impinging momentum kg·m·s?1 in a manner that will provide an experimental basis for asymmetrical anomalies that may or may not exist within a measurable range of the electromagnetic spectrum.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: June 19, 2018
    Inventor: Steve W Fleck
  • Patent number: 9989414
    Abstract: An optical measurement method in which a series of light pulses are generated using a pulsed laser having a set of different mode hop sequences (e.g., an external-cavity quantum cascade laser (EC-QCL)), the light pulses are detected with the detector to generate a respective pulse data set for each of the light pulses, and the pulse data sets are sorted into classes based on correlation coefficients. Sorting the pulse data sets into classes allows the pulse data sets originating from each of the mode hop sequences of the pulsed laser to be treated independently of the pulse data sets originating from others of the mode hop sequences in subsequent processing.
    Type: Grant
    Filed: March 29, 2013
    Date of Patent: June 5, 2018
    Inventor: Adam Kleczewski
  • Patent number: 9960843
    Abstract: Using pump-probe measurements on multi-span optical links may result in the determination of one or more of the following: 1) wavelength-dependent power profile and gain evolution along the optical link; 2) wavelength-dependent dispersion map; and 3) location of regions of high polarization-dependent loss (PDL) and polarization-mode dispersion (PMD). Such measurements may be a useful diagnostic for maintenance and upgrade activities on deployed cables as well as for commissioning new cables.
    Type: Grant
    Filed: April 21, 2016
    Date of Patent: May 1, 2018
    Assignee: Ciena Corporation
    Inventors: Andrew D. Shiner, Michael Andrew Reimer, Maurice O'Sullivan, Andrzej Borowiec
  • Patent number: 9867528
    Abstract: Methods and apparatus for performing interferometric measurements on ear tissue within a person's ear, wherein the measurements are performed as a function of pressure within the ear canal. Measurements may be performed at a plurality of pressures, including pressures greater than, and less than, atmospheric pressure. Using an apparatus in accordance with the invention, methods are provided for characterizing a tympanic membrane, as well as a biofilm adjacent to the tympanic membrane, and an effusion in the middle ear. The tympanic membrane may be characterized as to geometrical features and mobility. Characterizations provided by the apparatus serve to diagnose ear pathology.
    Type: Grant
    Filed: June 12, 2014
    Date of Patent: January 16, 2018
    Assignee: The Board of Trustees of the University of Illinois
    Inventors: Stephen A. Boppart, Ryan Shelton
  • Patent number: 9869868
    Abstract: A light splitting module for obtaining spectrums of an object to be tested is disclosed, which sequentially includes a light entrance window, a diffuser and a filter array along a light entrance direction, wherein the filter array is an angle modulated filter array which has multiple subareas and includes multiple filters with different center wavelengths respectively corresponding to the subareas. Also, a dual-mode multiplexing optical device is disclosed, which includes the light splitting module, an illumination module and a light field imaging module, can realize the integration of spectral detection and light field imaging, so it can be applied to material spectral detection, digital image detection and digital focusing for obtaining high-resolution imaging results; and simultaneously, the modules of the device are detachable, so that users can use the device as required.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: January 16, 2018
    Assignee: University of Electronic Science and Technology of China
    Inventors: Ziji Liu, Xuan He, Xing Xiong, Zhiqing Liang, Yadong Jiang
  • Patent number: 9865692
    Abstract: A spatial terahertz wave phase modulator based on the high electron mobility transistor is provided. The phase modulator combines the quick-response high electron mobility transistor with a novel metamaterial resonant structure, so as to rapidly modulate terahertz wave phases in a free space. The phase modulator includes a semiconductor substrate, an HEMT epitaxial layer, a periodical metamaterial resonant structure and a muff-coupling circuit. A concentration of 2-dimensional electron gas in the HEMT epitaxial layer is controlled through loading voltage signals, so as to change an electromagnetic resonation mode of the metamaterial resonant structure, thereby achieving phase modulation of terahertz waves. The phase modulator has a phase modulation depth of over 90 degrees within a large bandwidth, and a maximum phase modulation depth is about 140 degrees. Furthermore, the phase modulator is simple in structure, easy to machine, high in modulation speed, convenient to use, and easy to package.
    Type: Grant
    Filed: May 4, 2017
    Date of Patent: January 9, 2018
    Assignee: University of Electronic Science and Technology of China
    Inventors: Yaxin Zhang, Yuncheng Zhao, Shixiong Liang, Ziqiang Yang
  • Patent number: 9846078
    Abstract: Compensating for frequency drift of a reference energy source in an FT interferometer based spectrometer instrument may include obtaining data representing a reference interferogram collected in response to a trigger signal having been generated in dependence on the emission frequency of the reference energy source, and subsequently obtaining data representing a target interferogram recorded by the FT interferometer in response to a trigger signal also having been generated in dependence on the emission frequency of the reference energy source in the same manner. The method may further include comparing the obtained data to determine a phase shift between the interferograms in a window in at least one region away from center-burst, and generating a mathematical transform dependent on the determined shift to be subsequently applied to generate data representing a frequency stabilized interferogram of an unknown sample recorded by the FT interferometer.
    Type: Grant
    Filed: October 17, 2011
    Date of Patent: December 19, 2017
    Inventor: Henrik Vilstrup Juhl
  • Patent number: 9816918
    Abstract: A laser gas analyzer includes a light emitter which emits a laser light irradiated onto a gas to be measured; a light receiver which receives a laser light which transmitted the gas to be measured; a plurality of optical-axis adjustment mechanisms, one of which is provided in the light emitter and the other one of which is provided in the light receiver; a main display which is provided in one of the light emitter and the light receiver and displays thereon the measured result acquired by receiving the laser light which transmitted the gas to be measured; and a sub-display which is provided in the other one of the light emitter and the light receiver and displays thereon a part of the measured result displayed on the main display.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: November 14, 2017
    Assignee: Yokogawa Electric Corporation
    Inventors: Kazuto Tamura, Kentaro Hazama, Makoto Kato
  • Patent number: 9784674
    Abstract: The present invention relates to a method, apparatus and system for measuring the content of either one or more gas analytes that may be part of a gas. The present invention applies a spectroscopic method that utilizes an extremely narrow linewidth laser beam that is absorbed when its wavelength is swept across the interval containing the absorption line of the analyte. The method, apparatus and system of the present invention is applicable to any analyte in gas phase that is part of a gas mixture, or to any analyte in a plasma phase, as well as analytes in other environments.
    Type: Grant
    Filed: September 21, 2015
    Date of Patent: October 10, 2017
    Inventor: Nicolae Miron
  • Patent number: 9766131
    Abstract: A tunable laser wavelength measurement system includes an interferometric wavelength tracking system that uses a combination of interferometric and wavelength reference measurements to directly measure the laser output wavelength, The measurement exhibits the following desirable error signal characteristics: directional information, continuity, low latency, absolute information, high accuracy, high precision, and little or no drift, A tunable laser wavelength control system additionally incorporates electronics to compare the measured laser wavelength to a desired wavelength or wavelength function, and to generate a feedback control signal to control the wavelength of the laser output based on the comparison. In one non-limiting example implementation, the desired wavelength function is repetitive.
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: September 19, 2017
    Assignee: Intuitive Surgical Operations, Inc.
    Inventors: Ryan Seeley, Mark E. Froggatt
  • Patent number: 9753014
    Abstract: A system may include a data analysis device that is configured to receive from an ultrasonic waveform detector ultrasonic waveform data representative of an ultrasonic waveform that propagated through a sample and resonated within a defect within the sample. The data analysis device may be further configured to select a portion of the ultrasonic waveform data, apply a Fast Fourier Transform to the portion of the ultrasonic waveform data to transform the portion from a time domain to a frequency domain, identify a characteristic frequency of the portion in the frequency domain, and determine a characteristic of the defect based on the characteristic frequency of the portion. In some examples, the characteristic of the defect may be at least one of an approximate size or an approximate shape of the defect.
    Type: Grant
    Filed: February 17, 2012
    Date of Patent: September 5, 2017
    Assignee: Rolls-Royce Corporation
    Inventors: Michael G. Glavicic, Jason A. Gilbert
  • Patent number: 9729987
    Abstract: A testing method or apparatus utilizes a filter or modifier to measure time varying or dynamic harmonic, intermodulation, cross modulation, and or N-Beat or triple distortion from a device. With a stairstep or arbitrary signal and another signal, Nth order harmonic, cross modulation, triple beat, N-Beat, and or intermodulation distortion is measured via the filter or modifier at different offsets or time provided by an arbitrary low frequency signal. For example, an amplifier with crossover distortion will show increased (e.g., time varying) harmonic, cross modulation, triple beat, and or intermodulation distortion near the zero crossing while providing less distortion in other portions of the transfer curve of the amplifier. One or more distortion signals from the device (e.g., audio device) may be measured for a phase and or frequency modulation effect.
    Type: Grant
    Filed: October 9, 2014
    Date of Patent: August 8, 2017
    Inventor: Ronald Quan
  • Patent number: 9655523
    Abstract: Optical imaging or spectroscopy described can use laminar optical tomography (LOT), diffuse correlation spectroscopy (DCS), or the like. An incident beam is scanned across a target. An orthogonal or oblique optical response can be obtained, such as concurrently at different distances from the incident beam. The optical response from multiple incident wavelengths can be concurrently obtained by dispersing the response wavelengths in a direction orthogonal to the response distances from the incident beam. Temporal correlation can be measured, from which flow and other parameters can be computed. An optical conduit can enable endoscopic or laparoscopic imaging or spectroscopy of internal target locations. An articulating arm can communicate the light for performing the LOT, DCS, or the like. The imaging can find use for skin cancer diagnosis, such as distinguishing lentigo maligna (LM) from lentigo maligna melanoma (LMM).
    Type: Grant
    Filed: December 29, 2009
    Date of Patent: May 23, 2017
    Assignee: The Trustees of Columbia University in the City of New York
    Inventors: Elizabeth Marjorie Clare Hillman, Sean A. Burgess
  • Patent number: 9638862
    Abstract: Monolithic beam-shaping optical systems and methods are disclosed for an optical coherence tomography (OCT) probe that includes a transparent cylindrical housing having asymmetric optical power. The system includes a transparent monolithic body having a folded optical axis and at least one alignment feature that supports the end of an optical fiber adjacent an angled planar end wall. The monolithic body also includes a total-internal reflection surface and a lens surface that define object and image planes. Light from the optical fiber end traverses the optical path, which includes the cylindrical housing residing between the lens surface and the image plane. Either the lens surface by itself or the lens surface and the reflective (eg, TIR) surface in combination are configured to substantially correct for the asymmetric optical power of the cylindrical housing, thereby forming a substantially rotationally symmetric image spot at the image plane.
    Type: Grant
    Filed: April 16, 2015
    Date of Patent: May 2, 2017
    Assignee: Corning Incorporated
    Inventors: Venkata Adiseshaiah Bhagavatula, Klaus Hartkorn, Daniel Max Staloff
  • Patent number: 9638577
    Abstract: A spectrometer including: a spectral dispersion mechanism of an initial light beam; and a photodetector. The spectral dispersion mechanism includes at least three reflective diffraction gratings parallel to consecutive sides of a convex polygon, arranged such that a portion of the initial light beam is diffracted once by each diffraction grating in turn and is diffracted at least a second time by at least one of the diffraction gratings.
    Type: Grant
    Filed: August 4, 2014
    Date of Patent: May 2, 2017
    Assignee: Commissariat à l'énergie atomique et aux énergies alternatives
    Inventor: Jacques Luce
  • Patent number: 9606050
    Abstract: Compensating for amplitude drift in a spectrometer may include making successive performances of a standardization process to generate, at each performance, a mathematical transform to compensate for amplitude drift for application by an arithmetic unit to a spectrum obtained by the spectrometer in an interval between the performances. The compensating may include modifying the mathematical transform with a function dependent on spectral data from a zero material measured in association with the standardization process and the single beam zero spectrum measured in an interval between performances. The compensating may include applying the modified mathematical transform to a spectrum from an unknown sample.
    Type: Grant
    Filed: August 19, 2011
    Date of Patent: March 28, 2017
    Inventor: Henrik Vilstrup Juhl
  • Patent number: 9599454
    Abstract: An optical interferometer includes: a light source that emits a coherent first beam and a second beam that has a frequency difference corresponding to the natural frequency of a target molecule; amplitude modulating means that modulates the amplitude of the second beam; splitting means that splits the first beam into a reference beam and a first applied beam; optical path length adjusting means that adjusts the optical path length of the reference beam; and detecting means that detects an interference pattern between the reference beam and the first beam (a signal beam) that has experienced a stimulated Raman loss or gain in accordance with the amplitude modulation as a result of the frequency difference resonating with the target molecule when the first applied beam and a second applied beam (the amplitude modulated second beam) have been applied to a measurement position of an object.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: March 21, 2017
    Inventor: Hiroharu Yui
  • Patent number: 9595554
    Abstract: A sensor arrangement with a silicon-based optical sensor, particularly color sensors for colorimetric applications is disclosed. The invention aims to find a novel possibility for suppressing interference ripples occurring in optical sensors when adding substrates with optically functional coatings which permits a simple production without complicated adaptation layers. The sensor passivation is composed of a combination of thin SiO2 layer in the range of 5 to 10 nm and an antireflection-matched Si3N4 layer and a substrate which carries at least one optical filter is arranged over the sensor passivation and connected to the sensor by means of an adhesive and forms an intermediate space between sensor surface and optical filter which is filled with an optical medium having a low refractive index (n2) and a height variation (?h) over the associated sensor surface.
    Type: Grant
    Filed: May 8, 2014
    Date of Patent: March 14, 2017
    Assignee: MAZeT GmbH
    Inventors: Gunter Siess, Marcus Roeppischer, Wilfried Krueger
  • Patent number: 9581493
    Abstract: A spectrometer is provided for acquiring a Raman spectrum from a sample. The spectrometer includes a first laser, a second laser, a detector and a processing device. The first laser is adapted to produce a first laser beam for generating first Raman spectra from the sample. The second laser is adapted to produce a second laser beam for generating second Raman spectra from the sample. The detector is adapted to collect the first Raman spectra and the second Raman spectra. The processing device is adapted to process the collected first and second Raman spectra to provide the Raman spectrum.
    Type: Grant
    Filed: February 12, 2014
    Date of Patent: February 28, 2017
    Assignee: Bruker Optics, Inc.
    Inventors: John B. Cooper, Mohamed F. Abdelkader, Kent L. Wise
  • Patent number: 9574941
    Abstract: 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 introducing a delay between the split interferometer input signals prior to interfering the split interferometer input signals. The spectrometer additionally has a controllable delay element operable to adjust the delay introduced by the interferometer and a dispersive element outputting a plurality of narrowband outputs representative of a received broadband input signal. The interferometer and dispersive element are optically connected to output a plurality of narrowband interferograms representative of a spectra of a spectrometer input signal received by the spectrometer, and the plurality of narrowband interferograms are received by a detector array for analysis.
    Type: Grant
    Filed: May 30, 2012
    Date of Patent: February 21, 2017
    Inventors: Arthur Nitkowski, Arsen Hajian
  • Patent number: 9569845
    Abstract: A method and system for characterizing cell motion comprising: receiving image data corresponding to a set of images of a cell culture captured at a set of time points; segmenting, from at least one image of the set of images, a cell subpopulation from the cell culture; determining a resting signal for the cell subpopulation; determining a single-peak motion signal based upon the set of images, the set of time points, and the resting signal; detrending the single-peak motion signal of the cell subpopulation based upon the resting signal; determining values of a set of motion features of the cell subpopulation, thereby characterizing cell motion; and clustering the cell subpopulation with at least one other cell subpopulation based upon at least one of the single-peak motion signal and a value of the set of motion features.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: February 14, 2017
    Assignee: Cellogy, Inc.
    Inventors: Seyyedeh Mahnaz Maddah, Kevin Loewke
  • Patent number: 9560973
    Abstract: A subject information acquiring device which has: an light absorbing member provided outside a subject; a light source radiating pulsed light on the subject and the light absorbing member; a detector detecting an acoustic wave produced from the subject and the light absorbing member by means of the pulsed light; and a signal processing unit acquiring subject information using a detection signal, and the signal processing unit calculates a second detection signal by specifying a signal resulting from an acoustic wave produced from the light absorbing member in a first detection signal, acquiring impulse response data using the specified signal, and deconvoluting the first detection signal using the impulse response data, and acquires the subject information using the second detection signal, can reduce image deterioration due to probe characteristics even when an impulse response of a probe is not measured in advance in a photoacoustic tomography.
    Type: Grant
    Filed: December 13, 2011
    Date of Patent: February 7, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kazuhiko Fukutani
  • Patent number: 9476768
    Abstract: 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.
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: October 25, 2016
    Assignee: Massachusetts Institute of Technology
    Inventors: Lauren DeFlores, Andrei Tokmakoff
  • Patent number: 9466628
    Abstract: A solid-state spectral imaging device is described. The device includes an image sensor and a plurality of optical filters directly processed on top of the image sensor. Each optical filter includes a first mirror and a second mirror defining an optical filter cavity having a fixed height. Each optical filter also includes a first electrode and a second electrode having a fixed position located opposite to each other and positioned to measure the height of the optical filter cavity. Further, a method to calibrate spectral data of light and a computer program for calibrating light is described.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: October 11, 2016
    Assignee: IMEC
    Inventors: Pilar Gonzalez, Murali Jayapala, Andy Lambrechts, Klaas Tack
  • Patent number: 9407060
    Abstract: Embodiments herein provide for an optical frequency reference including a fine optical frequency comb and a coarse optical frequency comb. The fine comb has a first tooth and a frequency spacing (FCS) between teeth that is locked to a fractional or integer multiple of a radio frequency reference. The coarse comb has a second tooth that is locked to the first tooth and a frequency spacing (CCS) between teeth that is locked to an integer multiple of the FCS. An absolute optical frequency of at least one tooth of the coarse optical frequency comb is set.
    Type: Grant
    Filed: November 20, 2014
    Date of Patent: August 2, 2016
    Assignee: Honeywell International Inc.
    Inventors: Chad Fertig, Steven Tin
  • Patent number: 9329085
    Abstract: A spectroscopy system comprising at least two laser modules, each of the laser modules including a laser cavity, a quantum cascade gain chip for amplifying light within the laser cavity, and a tuning element for controlling a wavelength of light generated by the modules. Combining optics are used to combine the light generated by the at least two laser modules into a single beam and a sample detector detects the single beam returning from a sample.
    Type: Grant
    Filed: June 4, 2014
    Date of Patent: May 3, 2016
    Assignee: Block Engineering, LLC
    Inventors: Petros Kotidis, Erik Deutsch, Ninghui Zhu, Dan Cavicchio
  • Patent number: 9322768
    Abstract: A pseudo-active chemical imaging sensor including irradiative transient heating, temperature nonequilibrium thermal luminescence spectroscopy, differential hyperspectral imaging, and artificial neural network technologies integrated together. The sensor may be applied to the terrestrial chemical contamination problem, where the interstitial contaminant compounds of detection interest (analytes) comprise liquid chemical warfare agents, their various derivative condensed phase compounds, and other material of a life-threatening nature. The sensor measures and processes a dynamic pattern of absorptive-emissive middle infrared molecular signature spectra of subject analytes to perform its chemical imaging and standoff detection functions successfully.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: April 26, 2016
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventors: Arthur H. Carrieri, Tudor N. Buican, Erik S. Roese, James Sutter, Alan C. Samuels
  • Patent number: 9291444
    Abstract: Provided is an inexpensive, high performance, compact, and energy saving light reflection mechanism comprising a first moving portion having a reflecting surface on the front surface, a supporting portion which supports the first moving portion, a first beam and a translating beam which couple the first moving portion and the supporting portion in the form of cantilever beam above and below the supporting portion, and a drive portion which moves the first moving portion, wherein a large amplitude can be obtained by small energy when the first moving portion is forced into resonance vibration in the direction perpendicular to the first reflecting surface. Also provided is an optical interferometer and a spectral analyzer.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: March 22, 2016
    Assignee: Konica Minolta Holdings, Inc.
    Inventors: Shinya Matsuda, Satoru Hirose
  • Patent number: 9273994
    Abstract: A method and a system for measuring an optical asynchronous sample signal. The system for measuring an optical asynchronous sampling signal comprises a pulsed optical source capable of emitting two optical pulse sequences with different repetition frequencies, a signal optical path, a reference optical path, and a detection device. Since the optical asynchronous sampling signal can be measured by merely using one pulsed optical source, the complexity and cost of the system are reduced. A multi-frequency optical comb system using the pulsed optical source and a method for implementing the multi-frequency optical comb are further disclosed.
    Type: Grant
    Filed: September 2, 2014
    Date of Patent: March 1, 2016
    Inventors: Zheng Zheng, Xin Zhao, Lei Liu, Jiansheng Liu
  • Patent number: 9240060
    Abstract: A method and an apparatus for generating a tomographic image are provided. The method for generating a tomographic image may involve: detecting a principal frequency region corresponding to a portion of a frequency data corresponding to a tomographic image, determining a plurality of sub frequency regions within the principal frequency region, and generating, by a processor, the tomographic image by synthesizing data of the plurality of sub frequency regions.
    Type: Grant
    Filed: January 9, 2013
    Date of Patent: January 19, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jae-guyn Lim, Won-hee Choe, Seong-deok Lee, Woo-young Jang
  • Patent number: 9198860
    Abstract: The present invention provides a particulate pharmaceutical composition which has improved drug encapsulation stability and is suitable for a drug delivery system. The particulate pharmaceutical composition 1 contains: a plurality of block copolymer unit 2 arranged radially, each of which has a hydrophobic polymer-chain segment 2b, which is arranged radially inside, and a hydrophilic polymer-chain segment 2a, which is arranged radially outside; a drug 4, which includes a biomacromolecule; and a charged lipid 3, which has an electrical charge opposite to that of the drug 4; wherein the charged lipid 3 is being attracted to the hydrophobic polymer-chain segment 2b, and the drug 3 is positioned radially inside the hydrophobic polymer-chain segment 2b. The pharmaceutical composition 1 can effectively prevent the drug 4 from disengaging from the particle.
    Type: Grant
    Filed: February 14, 2011
    Date of Patent: December 1, 2015
    Assignee: NANOCARRIER CO., LTD.
    Inventors: Atsushi Ishii, Yasuki Kato