Holography Patents (Class 356/457)
  • Patent number: 10969475
    Abstract: The present disclosure describes a system and method for encoding pulses of light for LiDAR scanning. The system includes a sequence generator, a light source, a modulator, a light detector, a correlator, and a microprocessor. The sequence generator generates a sequence code that the modulator encodes into a pulse of light from the light source. The encoded pulse of light illuminates a surface of an object, in which scattered light from the encoded light pulse is detected. The correlator correlates the scattered light with the sequence code that outputs a peak value associated with a time that the pulse of light is received. The microprocessor is configured to determine a time difference between transmission and reception of the pulse of light based on whether the amplitude of the peak exceeds the threshold value. The microprocessor calculates a distance to the surface of the object based on the time difference.
    Type: Grant
    Filed: January 5, 2018
    Date of Patent: April 6, 2021
    Assignee: INNOVUSION IRELAND LIMITED
    Inventors: Yimin Li, Junwei Bao, Rui Zhang
  • Patent number: 10845760
    Abstract: A time delay error occurring in the case of acquiring two holograms (object hologram and reference hologram) necessary for reconstruction in the related art or in the case of acquiring four physical holograms having different phase shift degrees may be removed. DC noise (including background noise) may be completely removed by using a software-implemented phase shifting method.
    Type: Grant
    Filed: January 8, 2020
    Date of Patent: November 24, 2020
    Assignee: NAEILHAE, CO. LTD.
    Inventors: Byung Mok Kim, Mal Eum Sung, Seong Jin Park, Sang Jin Lee
  • Patent number: 10823547
    Abstract: A method is presented for determining a phase of an input beam (110, Ein) without a reference ray. In the method, an input beam (110, Ein) having a plurality of input rays is split into a main beam (112, E1) and a reference beam (114, E2) in such a way that each input ray is split into a main ray of the main beam (112, E1) and a comparative ray of the reference beam (114, E2). The main beam (112, E1) is propagated along a first interferometer arm, and the reference beam (114, E2) is propagated along the second interferometer arm. The propagated main beam (112, E1) and the propagated reference beam (114, E2) are superposed to form an interference beam having a plurality of interference rays.
    Type: Grant
    Filed: June 1, 2017
    Date of Patent: November 3, 2020
    Inventor: Martin Berz
  • Patent number: 10817729
    Abstract: Aspects of the disclosure relate to dynamic driving metric output platforms that utilize improved computer vision methods to determine vehicle metrics from video footage. A computing platform may receive video footage from a vehicle camera. The computing platform may determine that a reference marker in the video footage has reached a beginning and an end of a road marker based on brightness transitions, and may insert time stamps into the video accordingly. Based on the time stamps, the computing platform may determine an amount of time during which the reference marker covered the road marking. Based on a known length of the road marking and the amount of time during which the reference marker covered the road marking, the computing platform may determine a vehicle speed. The computing platform may generate driving metric output information, based on the vehicle speed, which may be displayed by an accident analysis platform.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: October 27, 2020
    Assignee: Allstate Insurance Company
    Inventors: Juan Carlos Aragon, Regina Madigan
  • Patent number: 10779773
    Abstract: The invention is directed to methods and systems of hyperspectral and multispectral imaging of medical tissues. In particular, the invention is directed to new devices, tools and processes for the detection and evaluation of diseases and disorders such as, but not limited to diabetes and peripheral vascular disease, that incorporate hyperspectral or multispectral imaging.
    Type: Grant
    Filed: December 23, 2013
    Date of Patent: September 22, 2020
    Assignee: Hypermed Imaging, Inc.
    Inventors: Jenny E. Freeman, Svetlana Panasyuk, Michael Hopmeier, Kevin Schomacker, Derek Brand
  • Patent number: 10564602
    Abstract: A method for observing a sample includes illuminating the sample with a light source and forming a plurality of images, by an imager, the images representing the light transmitted by the sample in different spectral bands. From each image, a complex amplitude representative of the light wave transmitted by the sample is determined in a determined spectral band. The method further includes backpropagation of each complex amplitude in a plane passing through the sample, determining a weighting function from the back-propagated complex amplitudes, propagating the weighting function in a plane along which the matrix photodetector extends, updating each complex amplitude, in the plane of the sample, according to the weighting function propagated.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: February 18, 2020
    Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
    Inventors: Cedric Allier, Thomas Bordy, Olivier Cioni, Lionel Herve, Sophie Morel
  • Patent number: 10564603
    Abstract: A time delay error occurring in the case of acquiring two holograms (object hologram and reference hologram) necessary for reconstruction in the related art or in the case of acquiring four physical holograms having different phase shift degrees may be removed. DC noise (including background noise) may be completely removed by using a software-implemented phase shifting method.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: February 18, 2020
    Assignee: NAEILHAE, CO. LTD.
    Inventors: Byung Mok Kim, Mal Eum Sung, Seong Jin Park, Sang Jin Lee
  • Patent number: 10551306
    Abstract: A system for performing 3-dimensional (3-D) digital holographic refractometry includes a splitter to split a source light into a first light beam and a second light beam. A tomographic optical setup shines a sample with the first light beam and generates an image light beam. A detector array generates an interferogram signal in response to being simultaneously exposed to the image light beam and the second light beam.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: February 4, 2020
    Assignee: Lockheed Martin Coherent
    Inventors: Bruce G. Tiemann, Brian Krause
  • Patent number: 10534317
    Abstract: A display method lets a display beam to propagate in a transparent substrate while internally reflected repeatedly and lets the display beam partly emit out of the transparent substrate every time the display beam is internally reflected, thereby emitting display beams from almost entirety of a surface of the transparent substrate. The display beam is produced holographically. A display apparatus includes a spatial phase modulator that produces a display beam, a transparent substrate in which the display beam is internally reflected repeatedly to propagate in it, and a splitter that lets the display beam partly emit out of the transparent substrate every time the display beam is internally reflected.
    Type: Grant
    Filed: March 26, 2018
    Date of Patent: January 14, 2020
    Assignee: OLYMPUS CORPORATION
    Inventor: Yoshiaki Horikawa
  • Patent number: 10444520
    Abstract: A light sheet optical system comprising means for forming a light sheet using a non-diffractive or quasi non-diffractive and/or propagation invariant beam that has an asymmetric intensity beam profile transverse to the direction of propagation, such as an Airy beam.
    Type: Grant
    Filed: March 26, 2013
    Date of Patent: October 15, 2019
    Assignee: UNIVERSITY COURT OF THE UNIVERSITY OF ST ANDREWS
    Inventors: Kishan Dholakia, Tom Vettenburg
  • Patent number: 10401793
    Abstract: Motility contrast imaging (MCI) is a depth-resolved holographic technique to extract cellular and subcellular motion inside tissue. The holographic basis of the measurement technique makes it highly susceptible to mechanical motion. The motility contrast application, in particular, preferably includes increased mechanical stability because the signal is based on time-varying changes caused by cellular motion, which should not be confused with mechanical motion of the system. Apparatus for motility contrast imaging that provides increased mechanical stability are disclosed. It is based on common-path configurations, in which the signal and reference beams share optical elements in their paths to the detector. The two beams share mechanical motions in common, and hence those motions do not contribute to the signal.
    Type: Grant
    Filed: November 22, 2016
    Date of Patent: September 3, 2019
    Inventor: David D. Nolte
  • Patent number: 10256262
    Abstract: Hilbert phase microscopy (HPM) as an optical technique for measuring high transverse resolution quantitative phase images associated with optically transparent objects. Due to its single-shot nature, HPM is suitable for investigating rapid phenomena that take place in transparent structures such as biological cells. A preferred embodiment is used for measuring biological systems including measurements on red blood cells, while its ability to quantify dynamic processes on the millisecond scale, for example, can be illustrated with measurements on evaporating micron-size water droplets.
    Type: Grant
    Filed: June 10, 2014
    Date of Patent: April 9, 2019
    Assignees: Massachusetts Institute of Technology, Hamamatsu Photonics K.K.
    Inventors: Gabriel Popescu, Ramachandra Dasari, Michael Feld, Takahiro Ikeda
  • Patent number: 10247931
    Abstract: An optical measurement method and an optical measurement device for determining the spatial or spatiotemporal distribution of a sample, the sample comprising at least one retransmission source retransmitting light depending on light projected onto the sample according to a predetermined law. The method has steps of projection onto the sample of at least two compact light distributions belonging to different topological families, which propagate along the same optical path; detection of the light retransmitted by said at least one retransmission source of the sample; generation of at least one optical image from the detected light; and algorithmic analysis of the optical images for obtaining location data on said at least one retransmission source.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: April 2, 2019
    Assignee: Bioaxial SAS
    Inventor: Gabriel Y. Sirat
  • Patent number: 10241469
    Abstract: Provided are a morphological cell parameter-based erythrocyte test method and digital holographic microscope used therein, and the morphological cell parameter-based erythrocyte test method includes performing modeling to create a 3D image of an erythrocyte to be tested and measuring morphological parameters of the erythrocyte based on the 3D image. The morphological cell parameter-based erythrocyte test method performs modeling of a 3D image for an erythrocyte to be tested and measures morphological parameters of the erythrocyte based on the 3D image. Therefore, time and effort consumed in measurement may be reduced, and accuracy of the measurement is excellent.
    Type: Grant
    Filed: October 4, 2016
    Date of Patent: March 26, 2019
    Assignee: Industry-Academic Cooperation Foundation, Chosun University
    Inventors: Inkyu Moon, Keyvan Jaferzadeh
  • Patent number: 10222612
    Abstract: An optical device comprises a shared phase modulation mask configured to impart a first phase modulation to light of a first wavelength, and imparts a second phase modulation to light of a second wavelength, an irradiation optical system configured to cause the light of the first wavelength and the light of the second wavelength to enter the same incident region in the phase modulation mask, and a light collecting optical system configured to collect the light of the first phase-modulated first wavelength and the light of the second phase-modulated second wavelength to form an image corresponding to a point spread function.
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: March 5, 2019
    Assignee: SYSMEX CORPORATION
    Inventors: Masaya Okada, Shigeki Iwanaga
  • Patent number: 10101652
    Abstract: Disclosed herein an exposure apparatus capable of implementing a microfabrication onto a work with a higher throughput and a lower cost. The exposure apparatus generates interfering light by crossing two or more branched light beams branched from output light from a coherent light source at a predetermined interfering angle, and exposes the substrate by repeating an irradiation onto the substrate with the interfering light and a conveyance of the substrate. At this moment, the exposure apparatus shapes in interfering light irradiation region on the substrate onto which the interfering light is irradiated into a predetermined shape. Then, the exposure apparatus disposes a plurality of the interfering light irradiation regions in successive shots to be located adjacent to each other on the substrate in a direction of conveying the substrate without the interfering light irradiation regions being overlapped when exposing the substrate while conveying the substrate in a stepwise manner.
    Type: Grant
    Filed: September 24, 2015
    Date of Patent: October 16, 2018
    Assignee: USHIO DENKI KABUSHIKI KAISHA
    Inventors: Daisuke Yajima, Kentaro Nomoto, Yohei Nawaki
  • Patent number: 9891536
    Abstract: An super-resolution system for nano-patterning is disclosed, comprising an optical printing head that enables a super-resolution lithographic exposures compatible with conventional optical lithographic processes. The super-resolution exposures are carried out using light directed onto a medium using plasmonic structures, and in particular using plasmonic structures using specially designed super-resolution apertures, of which the “bow-tie” and “C-aperture” are examples. These specially designed apertures create small but bright images in the near-field transmission pattern. A printing head comprising an array of these apertures is held in close proximity to a medium for patterning. In some embodiments, a data processing system is provided to re-interpret the data to be patterned into a set of modulation signals used to drive the multiple individual channels and the multiple exposures.
    Type: Grant
    Filed: September 12, 2016
    Date of Patent: February 13, 2018
    Inventors: Franklin Mark Schellenberg, Keith Edward Bennett
  • Patent number: 9871948
    Abstract: A multimode waveguide illuminator and imager relies on a wave front shaping system that acts to compensate for modal scrambling and light dispersion by the multimode waveguide. A first step consists of calibrating the multimode waveguide and a second step consists in projecting a specific pattern on the wave guide proximal end in order to produce the desire light pattern at its distal end. The illumination pattern can be scanned or changed dynamically only by changing the phase pattern projected at the proximal end of the waveguide. The third and last step consists in collecting the optical information, generated by the sample, through the same waveguide in order to form an image. Known free space microscopy technique can be adapted to endoscopy with multimode waveguide, such as, but not limited to, fluorescence imaging or Raman spectros copy or imaging, 3D linear scattering imaging or two-photon imaging. Super-resolution, i.e.
    Type: Grant
    Filed: March 28, 2013
    Date of Patent: January 16, 2018
    Assignee: Ecole Polytechnique Fédérale de Lausanne (EPFL)
    Inventors: Ioannis Papadopoulos, Salma Farahi, Christophe Moser, Demetri Psaltis
  • Patent number: 9770217
    Abstract: Systems and methods are presented for evaluating a dental condition. A first digital representation of at least a portion of an oral cavity of a first patient is compared to a second digital representation of the oral cavity of the same patient. The first digital representation is representative of the oral cavity of the first patient at a first time and the second digital representation is representative of the oral cavity of the first patient at a second, later time. At least one clinically-significant difference between the first digital representation and the second digital representation are automatically identified and the first digital representation is displayed in a way that highlights the at least one clinically significant difference.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: September 26, 2017
    Assignees: Dental Imaging Technologies Corporation, PaloDEx Group OY
    Inventors: Joonas Erik Sandholm, Matti Petri Jouhikainen, Robert Frank Dillon
  • Patent number: 9599959
    Abstract: The present invention is related to an holographic probe device for recording a gabor hologram comprising: a coherent optical fiber bundle comprising a distal end and a proximal end; a recording medium optically coupled to the proximal end of the coherent optical fiber bundle; a light source producing in use a single light beam, illuminating the distal end of the coherent optical fiber bundle and the object to be observed.
    Type: Grant
    Filed: September 10, 2013
    Date of Patent: March 21, 2017
    Assignee: Universite libre de Bruxelles
    Inventors: Frank Dubois, Catherine Yourassowsky
  • Patent number: 9562761
    Abstract: A position measuring device of the invention includes a light emitter configured to emit a laser light, a hologram configured to generate a reconstructed image of an inclined surface relative to an optical axis, a light receiver disposed on a reconstructed image forming surface of the hologram, and a measurement unit configured to measure a position of an object based on a position of light received by the light receiver. In the position measuring device of the invention, the light emitter may emit a linear laser light and the light receiver may include an image sensor having a two-dimensional array of pixels.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: February 7, 2017
    Assignee: MITUTOYO CORPORATION
    Inventor: Toshihisa Takai
  • Patent number: 9513112
    Abstract: A collimated laser beam is directed towards the wafer bottom such that the impinging light is partially forward deflected along the vias' bottom edges. Concentric laser interference fringes occur on the wafer top from constructive and destructive interference between the forward deflected and directly through propagating laser. A top down optical image from a number of vias' top openings and a top down fringe image from the same vias' concentric fringe sets are processed to three dimensionally characterize the vias.
    Type: Grant
    Filed: August 22, 2014
    Date of Patent: December 6, 2016
    Assignee: n&k Technology, Inc.
    Inventors: Christopher Rush, John C. Lam
  • Patent number: 9482512
    Abstract: A method includes sequentially acquiring phase-shifted images of an optical source in a plurality of predetermined positions in the z plane to form a plurality of image frame sequences; determining from the plurality of image frame sequences at least one phase-related characteristic associated with each predetermined position of the optical source in the z plane; and storing the at least one phase-related characteristic and the predetermined positions of the optical source in the z plane.
    Type: Grant
    Filed: August 7, 2015
    Date of Patent: November 1, 2016
    Assignee: Howard Hughes Medical Institute
    Inventor: Harald F. Hess
  • Patent number: 9316485
    Abstract: Embodiments of the invention relate to an apparatus and methods of using the apparatus wherein the apparatus includes a plurality of interferometers wherein the plurality of interferometers enable interference of an electromagnetic input signal, wherein the plurality of interferometers are configured to receive a plurality of sensor input signals from a plurality of sensors where the plurality of sensor input signals provide an indication of a plurality of sensed characteristics and the sensor input signals control the interference of the electromagnetic input signal by the plurality of interferometers, and wherein the plurality of interferometers are configured to provide a first output when the plurality of characteristics sensed by the sensors correspond to a first context and a second output when the plurality of characteristics sensed by the sensors correspond to a second context.
    Type: Grant
    Filed: November 29, 2010
    Date of Patent: April 19, 2016
    Assignee: Nokia Technologies Oy
    Inventor: Antti Niskanen
  • Patent number: 9270978
    Abstract: The present invention relates to a method and an apparatus for 3-D display based on random constructive interference. It produces a number of discrete secondary light sources by using an amplitude-phase-modulator-array, which helps to create 3-D images by means of constructive interference. Next it employs a random-secondary-light-source-generator-array to shift the position of each secondary light source to a random place, eliminating multiple images due to high order diffraction. It could be constructed with low resolution liquid crystal screens to realize large size real-time color 3-D display, which could widely be applied to 3-D computer or TV screens, 3-D human-machine interaction, machine vision, and so on.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: February 23, 2016
    Inventor: Zhiyang Li
  • Patent number: 9110443
    Abstract: Systems and methods for shear-corrected digital hologram acquisition, wherein the shear-corrected geometry is highly suited for two (or more) color operation with either broadband or laser illumination. An apparatus for shear-corrected recording of a spatially heterodyne hologram with broad-band or laser illumination includes: an illumination source; a beamsplitter optically coupled to said illumination source(s); a reference beam corner-mirror pair for translation and phase-shaping of the object beam optically coupled to the beamsplitter; an object optically coupled to the beamsplitter; a focusing lens optically coupled to both the reference beam corner-mirror pair and the object; and a digital recorder optically coupled to the focusing lens. A reference beam is incident upon the translating and phase-shaping corner-mirror pair, and the reference beam and an object beam are focused by the focusing lens at a focal plane of the digital recorder to form a spatially heterodyne hologram.
    Type: Grant
    Filed: May 13, 2011
    Date of Patent: August 18, 2015
    Assignee: Third Dimension IP LLC
    Inventor: Clarence E. Thomas
  • Patent number: 9001335
    Abstract: A method is provided for monitoring one or more silicon-containing compounds present in a biogas. The method includes generating a first absorption spectrum based on a ratio of a first spectral measurement and a second spectral measurement. The first spectral measurement is from a non-absorptive gas having substantially no infrared absorptions in a specified wavelength range of interest and the second spectral measurement is from a sample gas comprising the biogas. The method includes generating at least one surrogate absorption spectrum based on, at least, individual absorption spectrum for each of a subset of one or more silicon-containing compounds selected from a larger set of known silicon-containing compounds with known concentrations. A total concentration of the one or more silicon-containing compounds in the biogas can be calculated based on the first absorption spectrum and the at least one surrogate absorption spectrum.
    Type: Grant
    Filed: January 17, 2013
    Date of Patent: April 7, 2015
    Assignee: MKS Instruments Inc.
    Inventors: Charles Mark Phillips, Barbara Marshik-Geurts, Leonard I. Kamlet, Martin L. Spartz, Vidi Saptari
  • Publication number: 20150085291
    Abstract: A compact, self-contained holographic and interferometric apparatus and methods for eliminating vibration, including methods for eliminating relative displacement and vibration errors present in object and reference beam paths, are disclosed. The self-contained apparatus (600) includes an illuminated object (302) that scatters light and an objective lens (304) to form an object beam (350). The self-contained apparatus also includes a reference beam forming lens group (308) that forms a reference beam (352) from a portion of the object beam that passes through a pupil plane (306) of the objective lens (304). The object beam and the reference beam are propagated along a shared optical path, which eliminates relative displacement and vibration errors. The self-contained apparatus includes an image plane (316) where the object beam and reference beam are recombined to create an interference pattern, which is detected and analyzed.
    Type: Application
    Filed: January 31, 2013
    Publication date: March 26, 2015
    Inventors: Yuli Vladimirsky, Lev Ryzhikov
  • Patent number: 8976363
    Abstract: A probe system includes an imager and an inspection light source. The probe system is configured to operate in an inspection mode and a measurement mode. During inspection mode, the inspection light source is enabled. During measurement mode, the inspection light source is disabled, and a structured-light pattern is projected. The probe system is further configured to capture at least one measurement mode image. In the at least one measurement mode image, the structured-light pattern is projected onto an object. The probe system is configured to utilize pixel values from the at least one measurement mode image to determine at least one geometric dimension of the object. A probe system configured to detect relative movement between a probe and the object between captures of two or more of a plurality of images is also provided.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: March 10, 2015
    Assignee: General Electric Company
    Inventors: Clark Alexander Bendall, Kevin George Harding, Thomas Karpen, Guiju Song, Li Tao
  • Publication number: 20150062587
    Abstract: An in-line holographic microscope is used for measurements of micrometer-scale particles and associated suspending fluid medium containing the particles. The system yields heterodyne scattering patterns that may be interpreted with Lorenz-Mie theory to obtain precise time-resolved information on the refractive index of the suspending medium for determining chemical composition, concentrations and makeup thereof. This approach can perform spatially resolved refractometry with measurements on calibrated refractive index standards and monitor chemical concentration in a microfluidic channel. Using commercially available colloidal spheres as probe particles and a standard video camera for detection yields volumetric refractive index measurements with a resolution of 2×10?3 RIU for each probe particle in each holographic snapshot.
    Type: Application
    Filed: February 21, 2013
    Publication date: March 5, 2015
    Applicant: New York University
    Inventors: Hagay Shpaisman, Bhaskar Jyoti Krishnatreya, David G. Grier
  • Publication number: 20150056607
    Abstract: The current invention concerns a flow cytometric system and method for observing, analyzing and/or separating objects in a liquid sample, comprising a digital holographic microscope (DHM) and at least one fluidic system, whereby the DHM comprises illumination means, an interferometric system and digital recording means, whereby the fluidic system is capable of guiding said objects through an illumination beam of the illumination means of said DHM, whereby the fluidic system comprises a mechanism for inducing a liquid sample stream through the fluidic system, whereby preferably the fluidic system comprises a stream size controlling device for controlling the transverse dimensions of a liquid sample stream inside said fluidic system, preferably said stream size controlling device is capable of lining up the objects one-by-one or multiple objects at a time in said liquid sample stream.
    Type: Application
    Filed: February 3, 2013
    Publication date: February 26, 2015
    Inventors: Serge Jooris, Philip Mathuis
  • Patent number: 8941837
    Abstract: An apparatus for testing an optical surface comprising an array of holograms. The array includes a plurality of individual holograms arranged in an M×N format, in which M is the number of rows and N is the number of columns in the array. The array of holograms is positioned between the optical surface and a wavefront sensor. The array of holograms reflects a reference beam back to the wavefront sensor, and transmits a test beam to the optical surface. The array of holograms also receives the test beam reflected from the optical surface and transfers the test beam back to the wavefront sensor.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: January 27, 2015
    Assignee: Exelis, Inc.
    Inventors: Eugene Olczak, Cormic Merle, Greg Burdick
  • Patent number: 8937756
    Abstract: The present invention relates to use of a digital holographic microscopy and imaging setup and a method of digital holographic microscopy and imaging for detecting molecules or structures stained or labelled to at least one cell or conjugated to antibodies which are bound either directly to said at least one cell or indirectly via another or several antibodies in a chain bound to said at least one cell.
    Type: Grant
    Filed: February 7, 2011
    Date of Patent: January 20, 2015
    Assignee: Phase Holographic Imaging PHI AB
    Inventors: Mikael Sebesta, Kersti Alm, Anders Långberg, Anna Mölder, Johan Persson, Lennart Gisselsson
  • Patent number: 8937722
    Abstract: A method for imaging a microscopic object with improved resolution including the steps of measuring a complex wavefield scattered by the microscopic object with an instrument or microscope, the complex wavefield being represented by phase and amplitude or by real and imaginary parts; and computing an image of the microscopic object with a resolution better than given by the Abbe diffraction limit, including deconvolving the complex wavefield scattered by the microscopic object with a complex coherent transfer function (CTF) applied to the complex wavefield.
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: January 20, 2015
    Assignee: Ecole Polytechnique Federale de Lausanne (EPFL)
    Inventors: Yann Cotte, Nicolas Pavillon, Christian Depeursinge
  • Patent number: 8891089
    Abstract: An object of the invention is to provide a phase object identification device and method which can identify a phase object in a completely different manner from conventional methods for observing or measuring a phase object. A phase object identification device 1 for identifying a phase object for changing the phase of light includes a light source 2, a sample holding means 3 for holding a phase object 31 to be identified, a holographic recording medium 4 on which a hologram 41 formed by interference between reference light 25 and object light 24 that is phase-modulated by a known phase object 32 is recorded, and a light detector 5, a phase of light 21 emitted from the light source is modulated by the phase object to be identified to generate sample light 22, the hologram of the holographic recording medium is irradiated with the sample light, reproduced light 23 reproduced from the hologram of the holographic recording medium is detected by the light detector.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: November 18, 2014
    Assignee: Japan Science and Technology Agency
    Inventors: Eriko Watanabe, Kashiko Kodate
  • Publication number: 20140333935
    Abstract: In-line holography to create images of a specimen, such as one or more particles dispersed in a transparent medium. Analyzing these images with results from light scattering theory yields the particles' sizes with nanometer resolution, their refractive indexes to within one part in a thousand, and their three dimensional positions with nanometer resolution. This procedure can rapidly and directly characterize mechanical, optical and chemical properties of the specimen and its medium.
    Type: Application
    Filed: July 29, 2014
    Publication date: November 13, 2014
    Inventors: David G. Grier, Sang-Hyuk Lee, Fook C. Cheong
  • Patent number: 8879071
    Abstract: Methods and systems for resolving and determining sub-wavelength sized features and stresses by using infrared optical and thermal wavelength probing for holographic or interferometric evaluation and testing for all phases of semiconductor device development and manufacture. Specifically, systems and methods are disclosed for extending the range of optical holographic interferometric inspection for testing and evaluating microelectronic devices and determining the interplay of electromagnetic signals and dynamic stresses to the semiconductor material in which an enhanced imaging method provides continuous and varying magnification of the optical holographic interferometric images over a plurality of interleaved optical pathways of varying optical paths and imaging devices.
    Type: Grant
    Filed: May 28, 2013
    Date of Patent: November 4, 2014
    Assignee: Attofemto, Inc.
    Inventor: Paul L. Pfaff
  • Patent number: 8813550
    Abstract: A tire inspection machine includes an incoming conveyor adapted to transport tires to the machine and also align the tires in a transverse direction. An inspection table of the machine includes a table conveyor system that is responsive to a controller. The table and table conveyor are together arranged to permit scanning of both sidewall portions of a tire disposed thereon. A sensor detects a longitudinal position of the tire and stops the table conveyor when the tire is longitudinally aligned. A controller operates the table conveyor based on the longitudinal position of the tire.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: August 26, 2014
    Assignee: Bridgestone Bandag, LLC
    Inventor: John S. Lindsay
  • Publication number: 20140180075
    Abstract: There is a need for robust and portable system, apparatus and method for imaging subsurface of specimens. We have described a modular OCDR-OCT system and OFDR-OCT system to obtain high quality images. The instant application also discusses proprietary algorithms that have been modified from existing algorithms and their use as a combination to suit a particular system. The imaging of stationary, moving and combination of both subsurface structures such as retina for diabetic patients is described.
    Type: Application
    Filed: December 20, 2012
    Publication date: June 26, 2014
    Inventor: Manish Kulkarni
  • Publication number: 20140132960
    Abstract: A variable near-null compensator for measuring aspheric surfaces by subaperture stitching includes a pair of counter-rotating CGH phase plates, each of the phase plates having a phase function including two terms Z5 and Z7 of Zernike polynomials. The phase plates are mounted on a pair of precision rotary center-through tables, wherein rotational axes of the pair of precision rotary center-through tables coincide with the optical axes of the phase plates. A figure metrology apparatus includes a wavefront interferometer, the test mirror mount, the near-null compensator and the mechanical adjustment components therefor. The optical axis of the near-null compensator coincides with the optical axis of the interferometer. A method for measuring aspheric surfaces by subaperture stitching includes the steps of mounting the test mirror, measuring the subapertures with the figure metrology apparatus, and finally processing the data by stitching.
    Type: Application
    Filed: July 20, 2012
    Publication date: May 15, 2014
    Inventors: Shanyong Chen, Yifan Dai, Shengyi Li, Xiaoqiang Peng, Chao Xie, Yanglin Peng
  • Patent number: 8717574
    Abstract: A detector of light transmitted through a turbid medium, comprising: one or more Digital Optical Phase Conjugation (DOPC) devices, wherein the DOPC devices include (1) a sensor for detecting input light that has been transmitted through the turbid medium and inputted on the sensor; and (2) a spatial light modulator (SLM) for outputting, in response to the input light detected by the sensor, output light that is an optical phase conjugate of the input light.
    Type: Grant
    Filed: November 10, 2010
    Date of Patent: May 6, 2014
    Assignee: California Institute of Technology
    Inventors: Changhuei Yang, Meng Cui
  • Patent number: 8705043
    Abstract: A method for imaging an object using a microscope includes obtaining axial response data, the axial response data representative of a relationship between a separation between a top surface of the object and an objective lens of the microscope and an intensity of light reflected by the top surface of the object; positioning the object at a distance from the objective lens that is within a linear region of the axial response data; sequentially illuminating the object with a plurality of periodic patterns; obtaining a plurality of images of the object, each image resulting from the illumination of the object with a corresponding one of the plurality of periodic patterns; determining a reconstructed image of the object based on the plurality of images of the object; and, based on variations in the intensity of the reconstructed image, determining a topographic profile of the top surface of the object.
    Type: Grant
    Filed: December 13, 2010
    Date of Patent: April 22, 2014
    Assignee: Academia Sinica
    Inventors: Chau-Hwang Lee, Chun-Chieh Wang
  • Patent number: 8699033
    Abstract: A method for detecting a three dimensional object smaller than 300 nm includes providing a light source producing a first light beam (1), the light source being at least partially coherent; and splitting the first light beam (1) into an object beam (2) and a reference beam (6) by a first beam splitter (BS1). An image of the light source is produced in a light source image plane by a first microscope objective (L1), in the optical path of the object beam (2). The three dimensional object to be detected in an object cell (3) is positioned in the optical path of the object beam (2), between the first beam splitter (BS1) and the first microscope objective (L1). The object beam (2) and the reference beam (6) are recombined into a recombined beam (8) by use of optical devices. An optical stop (4) is placed in the light source image plane of the microscope objective (L1) on the optical axis of the microscope objective (L1).
    Type: Grant
    Filed: October 2, 2009
    Date of Patent: April 15, 2014
    Assignee: Universite Libre de Bruxelles
    Inventor: Frank Dubois
  • Patent number: 8675201
    Abstract: Apparatus and methods of four wave mixing (FWM) holography are described, including illuminating a sample with a first beam, a second beam, and a third beam, and combining the generated FWM signal with a reference beam at a imaging device to obtain holographic image data. In some examples, the first and second beams may be provided by a single pump-probe beam. The third beam may be a Stokes beam or an anti-Stokes beam. A representative example is coherent anti-Stokes Raman holography (CARS holography), which includes illuminating a sample with a pump/probe beam and a Stokes beam to obtain a CARS signal from the sample; and combining the CARS signal with a reference beam to obtain a CARS hologram.
    Type: Grant
    Filed: June 4, 2010
    Date of Patent: March 18, 2014
    Assignee: The Penn State Research Foundation
    Inventors: Zhiwen Liu, Kebin Shi, Demetri Psaltis, Qian Xu
  • Patent number: 8654337
    Abstract: A turbidity sensor for sensing the turbidity of a fluid in a working chamber in a household appliance is disclosed to include a light-transmissive body shell defining therein an accommodation chamber and covered with a cover member, and a sensor module, which includes a circuit board mounted in the accommodation chamber inside the body shell, a holder block a set of light-transmitting devices and a set of light-receiving devices on the circuit board in a right angle relationship for emitting light onto the fluid and picking up reflected light from suspended particles/impurities in the fluid for determination of the turbidity of the fluid.
    Type: Grant
    Filed: July 13, 2011
    Date of Patent: February 18, 2014
    Assignee: Solteam Opto, Inc.
    Inventors: Shang-Jung Wu, Zen-Chyuan Chen
  • Publication number: 20140028974
    Abstract: A novel imaging method, line-field holoscopy is presented. A line of light is projected across an object to be investigated through an imaging system. The light scattered from the investigated object is combined with reference radiation. The combined light is projected onto a detector providing a confocal restriction in one dimension. Astigmatic optics in the return path transform the light asymmetrically such that at the detector, the line focus is imaged to the confocal restriction, while the orthogonal direction is defocused. Embodiments including a swept source with linear detection array, and spectrometer based systems utilizing a 2D detector array are described. The data may be reconstructed to a B-scan by two-dimensional Fourier transform or other reconstruction method with or without combination of more complex algorithms.
    Type: Application
    Filed: January 18, 2013
    Publication date: January 30, 2014
    Applicant: Carl Zeiss Meditec, Inc.
    Inventor: Alexandre R. Tumlinson
  • Publication number: 20130308135
    Abstract: The present invention is related to a method for characterising transparent objects (2, 3) in a transparent medium (1), said transparent objects (2, 3) presenting an optical focal area (5, 6) said method comprising the steps of: illuminating a sample comprising the objects (2, 3) to be characterised by means of a directional light (7) source, thereby inducing light intensity peaks (5, 6) at the focal area of said transparent objects; determining at least one characteristic of the light intensity peak (5, 6) induced by said object to be characterised, determining from said light intensity peak (5, 6) at least one property of said object.
    Type: Application
    Filed: November 9, 2011
    Publication date: November 21, 2013
    Inventors: Frank Dubois, Catherine Yourassowsky
  • Publication number: 20130286403
    Abstract: An interferometric method for detecting information about a sample includes emitting a laser beam; splitting the laser beam into a reference beam and an object beam; transmitting the object beam through the sample in an incident angle; combining the reference beam with the object beam passed through the sample to form an interference pattern; detecting the interference pattern, and non-linearly scanning the object beam in order to detect a plurality of interference patterns.
    Type: Application
    Filed: April 25, 2012
    Publication date: October 31, 2013
    Applicants: The Arizona Board of Regents on behalf of the University of Arizona, CANON KABUSHIKI KAISHA
    Inventors: Isao Matsubara, Chung-Chieh Yu, Yasuyuki Unno, William Dallas
  • Patent number: 8526003
    Abstract: In the interferometric system, the image plane is imaged by an output imaging setup via a transmission system of reflectors to the output plane and a reflection type diffraction grating is located in the image plane of an imaging setup of a reference branch. The transmission systems of reflectors are adjusted so that axes of both branches coincide at an entrance to the output plane and parallel with a normal line of the output plane, and an axial beam, diffracted by the reflection type diffraction grating at an angle ?, enters into the output plane at an angle ?, and the relation between angle ? and ? is sin(?)=sin(?)/m, where m is a magnification of the output imaging setup. The system enables the achievement of a holographic imaging of an object by low-coherence waves. Incoherent waves allow the imaging of objects immersed in scattering media.
    Type: Grant
    Filed: April 11, 2011
    Date of Patent: September 3, 2013
    Assignee: Vysoke Uceni Technicke Brne
    Inventors: Radim Chmelík, Pavel Kolman, Tomá{hacek over (s)} Slabý, Martin Anto{hacek over (s)}, Zbyn{hacek over (e)}k Dostál
  • Patent number: 8525998
    Abstract: An optical phase processing system for a scattering medium. A first beam has a direction and a wavefront and the first beam is configured to enter a holographic recording medium. A scattering medium is illuminated by a signal beam generating at least one scattered beam. An interference pattern is recorded from the at least one scattered beam and the first beam. A second beam is generated in a direction opposite to the direction of the first beam, the second beam having a wavefront and a phase substantially opposite to a phase of the wavefront of the first beam, and the second beam is configured to enter the holographic recording medium. The second beam and the interference pattern interact to generate at least one reconstructed beam having a phase substantially opposite to a phase of the at least one scattered beam, and the at least one reconstructed beam is configured to be viewable through the scattering medium.
    Type: Grant
    Filed: September 20, 2010
    Date of Patent: September 3, 2013
    Assignee: California Institute of Technology
    Inventors: Zahid Yaqoob, Emily McDowell, Changhuei Yang