For Optical Configuration Patents (Class 356/458)
  • Patent number: 10809158
    Abstract: An apparatus for checking a tyre, having a support, a deformation system, a lighting arrangement, a moving member and a processing unit. The deformation system is configured to form an elastically deformed portion of inner surface and an elastically deformed portion of outer surface on the tyre. The lighting arrangement includes light sources and cameras to illuminate and detect deformed inner and outer surface portions of the tyre, and generate corresponding control signals. The moving member sets the support in relative rotation with respect to the light sources and the deformation system around a rotation axis of the tyre. The processing unit is configured so that while the light sources illuminate the deformed portions of outer and inner surfaces, the deformation system acts and the moving member imparts the relative rotation.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: October 20, 2020
    Assignee: PIRELLI TYRE S.P.A.
    Inventors: Alessandro Held, Vincenzo Boffa
  • Patent number: 10794688
    Abstract: An interferometric optical device that measures the curved wall shape of a cylindrical object and includes: an interferometric optical system that emits measurement light at the curved wall of the object, collects the light reflected by the object, and creates a composite wave that combines the reflected light and a reference light; a rotation drive assembly that is connected to the interferometric optical system and rotationally displaces the interferometric optical system centered about a rotation axis that coincides with a center axis of the cylindrical shape of the object; a sensor that acquires a two-dimensional distribution of the intensity of the composite wave using a plurality of photoreceptor elements arrayed two-dimensionally; and a computation device that computes the internal wall shape of the object based on the plurality of two-dimensional distributions acquired in a state where a rotation angle for the rotation drive mechanism varies.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: October 6, 2020
    Assignee: MITUTOYO CORPORATION
    Inventors: Ken Motohashi, Johannes Anna Quaedackers, Adriaan Tiemen Zuiderweg
  • Patent number: 10798333
    Abstract: An image creation unit of a server creates and stores a plurality of phase images or the like having different resolutions on the basis of holographic data collected by a measuring terminal. In response to an image transmission request according to an operation, an image transmission processing unit of the server extracts data of an image corresponding to an observation range after the movement from an image of an appropriate resolution and transmits the data to the browsing terminal. In the browsing terminal, a display image is formed by overlaying a high-resolution phase image corresponding to only an observation range to be displayed on low-resolution phase image of an observation target area.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: October 6, 2020
    Assignee: Shimadzu Corporation
    Inventor: Yusuke Aoi
  • Patent number: 10520295
    Abstract: Microscope (2) comprising a coherent light source (4) producing a coherent light beam (7), a light beam guide system (6) comprising a beam splitter (14) configured to split the coherent light beam (7) into a reference beam (7a) and a sample illumination beam (7b), a sample holder (18) configured to hold a sample (1) to be observed, a sample illumination device (28) configured to direct the sample illumination beam (7b) through the sample and into a microscope objective (37), a beam reuniter (16) configured to reunite the reference beam and sample illumination beam after passage of the sample illumination beam through the sample to be observed, and a light sensing system (8) configured to capture at least phase and intensity values of the coherent light beam downstream of the beam reuniter.
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: December 31, 2019
    Assignee: NANOLIVE SA
    Inventors: Yann Cotte, Pierre-Alain Cotte, Sebastien Equis, Andreas Kern
  • Patent number: 10488820
    Abstract: A digital holographic image-taking apparatus includes an illumination portion having a light emission surface for emitting illumination light toward an object, the illumination light having a specific wavelength in a coherent plane waveform; and an image sensor having an pixel array including two-dimensionally arranged pixels, the image sensor capturing an interference pattern generated based on the illumination light having acted on the object, in which the following conditional expression is satisfied: 0.0000001<Z2/S<16, where S represents the area of the light emission surface, and Z represents the distance from the light emission surface to the pixel array.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: November 26, 2019
    Assignee: OLYMPUS CORPORATION
    Inventor: Keigo Matsuo
  • Patent number: 10209673
    Abstract: An interference fringe pattern (ILR) between an inline spherical wave light (L) and an off-axis reference light (R) is recorded with a photo detector (4), and on which spatial-frequency filtering is applied to obtain a complex amplitude in-line hologram (JLR). A complex amplitude off-axis hologram (JOR) is derived by performing a spatial frequency filtering on a hologram (IOR) in which an object light (O) emitted from a microscopic subject illuminated with a spherical wave light (L) is recorded with a reference light (R), and the derived data is divided with data of the hologram (JLR) so that a complex amplitude in-line hologram (JOL) from which a component of the reference light (R) is eliminated is generated and recorded.
    Type: Grant
    Filed: July 7, 2011
    Date of Patent: February 19, 2019
    Assignee: University of Hyogo
    Inventor: Kunihiro Sato
  • Patent number: 10083338
    Abstract: The invention is an optical fingerprint sensor with prism module, including a shell; an optical prism arranged in the shell, the optical prism comprising a collection surface, a basal plane, a mirror surface and an output surface, there being a first included angle provided between the mirror surface and the collection surface, a second included angle provided between the mirror surface and the basal plane, a third included angle provided between the output surface and the collection surface, and a fourth included angle provided between the output surface and the basal plane; and an image sensing unit combined with the shell, comprising multiple luminous elements arranged beneath the basal plane of the optical prism correspondingly, and an image receiver and a lens arranged corresponding to the output surface.
    Type: Grant
    Filed: July 25, 2016
    Date of Patent: September 25, 2018
    Assignee: IDSPIRE CORPORATION LTD.
    Inventor: Ri Mun Sam
  • Patent number: 9976937
    Abstract: An apparatus for acquiring images of an interior surface of a tire includes at least one image acquisition module. Each image acquisition module is provided with a lighting source, an image acquisition device, and a reflector. The lighting source is arranged to project a beam of light onto a predetermined zone of the interior surface of the tire. The image acquisition device is arranged to acquire a reflected beam of light, which corresponds to light from the beam of light from the lighting source that is reflected off the predetermined zone of the tire. The reflector is positioned optically between the lighting source and the predetermined zone of the tire. Each image acquisition module may be provided with a plurality of lighting sources, image acquisition devices, and reflectors.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: May 22, 2018
    Assignee: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN
    Inventors: Julien Charlat, Christian Leobal
  • Patent number: 9800408
    Abstract: A method of and system for generating secure tokens and transmission based on (TRNG) generated tokens split into shares includes steps of: generating keys by a hardware based True Random number Generator (TRNG); sieving/filtering the generated keys using statistical tests suite; selecting the random numbers of required width as tokens; applying number to image transformation for the tokens; applying steganography methods of injecting into an image carrier to the selected tokens; and splitting the steganographic contents into at least two shares using Share Generation Appliance (SGA), which is based on visual cryptographic methods. The generated secure tokens are well suited for seamless secured shopping including product verification.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: October 24, 2017
    Assignee: UNIK SYSTEMS DESIGN & MARKETING PVT LTD
    Inventor: Vellat Lakshmi Thozhuvanoor
  • Patent number: 9658135
    Abstract: A tire inspection apparatus for the optical inspection of a tire (4) comprises a housing with a support surface (3) for the tire (4) to be inspected; several measuring heads (7, 8, 9, 10; 12, 13, 14, 15, 16, 17), each of which comprises an optical measuring system, for inspecting the inside tread surface (11) and/or the external lateral surface (18) of the tire (4); and a positioning device (21, 22, 23, 24) for moving some or all of the measuring heads (7-10; 12-17) into a rest position and into a measuring position. To improve a tire inspection apparatus of this type, the measuring heads (7-10; 12-17) and the support surface (3) are installed without freedom of rotation.
    Type: Grant
    Filed: June 23, 2014
    Date of Patent: May 23, 2017
    Assignee: Steinbichler Optotechnik GmbH
    Inventors: Marcus Steinbichler, Junli Sun, Berndhart Leitner, Stefan Otte, Emanuel Fuchs, Tobias Huber, Matthias Prams, Rainer Huber
  • Patent number: 9581814
    Abstract: A projection-type display device is connectively coupled to a mobile device (such as a smartphone) where the light generated by a small projection device is directed at a relatively transparent holographic optical element (HOE) to provide a display to an operator of the mobile device or a viewer. The projector and HOE may be configured to produce and magnify a virtual image that is perceived as being displayed at a large distance from the operator who views the image through the HOE. The HOE may comprise a volume grating effective at only the narrow wavelengths of the projection device to maximize transparency while also maximizing the light reflected from the display projector to the eyes of the operator.
    Type: Grant
    Filed: January 20, 2012
    Date of Patent: February 28, 2017
    Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
    Inventor: Andreas G. Nowatzyk
  • Patent number: 9581437
    Abstract: A non-contact optical probe utilizes an optical reference surface that projects a curved test wavefront toward the test surface and detects it by creating curved interferometric fringes localized in space in front of the reference surface. When a point to be measured on the test surface intersects the location of the fringes, the condition is detected by the probe. Because the fringes are localized at a known position in space with respect to a reference system, the precise coordinate of the surface point can be established. Such localized fringes are preferably produced by a spectrally controllable light source. The curvature of the fringes ensures a sufficiently large angle of acceptance for the probe to capture light reflected from points of high surface slope. The probe is particularly suitable for coordinate measurement machines.
    Type: Grant
    Filed: December 1, 2015
    Date of Patent: February 28, 2017
    Assignee: APRE INSTRUMENTS, LLC
    Inventors: Robert Smythe, Artur Olszak, Piotr Szwaykowski
  • Patent number: 9567975
    Abstract: A method for operating a wind turbine (10). The wind turbine (10) is operated with variable rotational speed between predeterminable minimum and maximum rotational speeds. A characteristic variable (51) of an oscillation of the wind turbine (10) is detected. The wind turbine (10) includes a tower (14) and a rotor (13). An open-loop or closed-loop control device (36, 50) provides open-loop control or closed-loop control of the rotational speed of the rotor (13) between a minimum rotational speed and a maximum rotational speed during a power-supplying operation of the wind turbine. A sensor (40) detects a characteristic variable (51) of an oscillation of the wind turbine (10) and the minimum rotational speed is changed depending on the characteristic value (51) of the oscillation. The minimum rotational speed is altered depending on the characteristic variable (51) of the oscillation by the open-loop or closed-loop control device (36, 50).
    Type: Grant
    Filed: August 30, 2011
    Date of Patent: February 14, 2017
    Assignee: Senvion SE
    Inventors: Marco Hansen, Karsten Warfen
  • Patent number: 9459459
    Abstract: Methods and devices for reducing the dimensions of an incident light beam of large dimensions are disclosed. The method includes the dispatching of a first light beam toward a partially reflecting plate of dimensions suitable for the dimensions of the light beam of large dimensions, the dispatching onto a convergent reflective element of a second light beam arising from the transmission through the partially reflecting plate of the first light beam, the dispatching of a third light beam arising from the reflection on the convergent reflective element of the second light beam, toward said partially reflecting plate, and the reflection of the third beam on the partially reflecting plate so as to form a fourth light beam.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: October 4, 2016
    Assignee: IMAGINE OPTIC
    Inventors: Nicolas Lefaudeux, Xavier Levecq
  • Patent number: 9157851
    Abstract: The drug evaluation device obtains, by an attenuated reflection method using a terahertz wave, an evaluation absorption spectrum for a frequency with respect to a liquid to be evaluated. When crystalline particles are suspended in a liquid, an absorption peak having a peak area corresponding to the amount of suspension appears in its absorption spectrum. Therefore, whether or not and by what ratio crystalline particles are suspended in the liquid can be determined according to whether or not the absorption peak exists and the peak area. When amorphous particles are suspended in the liquid, the baseline of its absorption spectrum lowers according to the ratio of amorphous particles suspended in the liquid. Therefore, whether or not and by what ratio amorphous particles are suspended in the liquid can be determined according to the lowering amount of the baseline.
    Type: Grant
    Filed: January 16, 2013
    Date of Patent: October 13, 2015
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Gen Takebe, Yoichi Kawada, Kouichiro Akiyama
  • Patent number: 9134109
    Abstract: Provided is an observation device which can obtain a phase image of a moving object rapidly with high sensitivity even when using a photodetector having a slow read-out speed per pixel. The observation device 1 comprises a light source 10, a first modulator 20, a second modulator 30, a lens 40, a beam splitter 41, a photodetector 46, and an arithmetic unit 50. The lens 40 receives scattered light generated by a moving object 2 and forms a Fourier transform image of the object 2. The photodetector 46 outputs data representing a sum in a v direction of data temporally changing at a frequency corresponding to a Doppler shift frequency of the light having reached each position on a light-receiving surface through the lens 40 at each position in a u direction at each time. The arithmetic unit 50 obtains an image of the object 2 according to the output of the photodetector 46.
    Type: Grant
    Filed: May 2, 2011
    Date of Patent: September 15, 2015
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Hidenao Iwai, Masatoshi Fujimoto
  • Patent number: 9134110
    Abstract: Provided is an observation device which can obtain a phase image of a moving object rapidly with high sensitivity even when using a photodetector having a slow read-out speed per pixel. The observation device 1 comprises a light source 10, a first modulator 20, a second modulator 30, a lens 40, a beam splitter 41, a photodetector 46, and an arithmetic unit 50. The lens 40 receives scattered light generated by a moving object 2 and forms a Fourier transform image of the object 2. The photodetector 46 outputs data representing a sum in a v direction of data temporally changing at a frequency corresponding to a Doppler shift frequency of the light having reached each position on a light-receiving surface through the lens 40 at each position in a u direction at each time. The arithmetic unit 50 obtains an image of the object 2 according to the output of the photodetector 46.
    Type: Grant
    Filed: May 2, 2011
    Date of Patent: September 15, 2015
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Hidenao Iwai, Masatoshi Fujimoto
  • Patent number: 9128041
    Abstract: The drug evaluation device obtains, by an attenuated reflection method using a terahertz wave, an evaluation absorption spectrum for a frequency with respect to a liquid to be evaluated. When crystalline particles are suspended in a liquid, an absorption peak having a peak area corresponding to the amount of suspension appears in its absorption spectrum. Therefore, whether or not and by what ratio crystalline particles are suspended in the liquid can be determined according to whether or not the absorption peak exists and the peak area. When amorphous particles are suspended in the liquid, the baseline of its absorption spectrum lowers according to the ratio of amorphous particles suspended in the liquid. Therefore, whether or not and by what ratio amorphous particles are suspended in the liquid can be determined according to the lowering amount of the baseline.
    Type: Grant
    Filed: January 16, 2013
    Date of Patent: September 8, 2015
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Gen Takebe, Yoichi Kawada, Kouichiro Akiyama
  • Patent number: 9128461
    Abstract: An advanced method of and apparatus for manipulating electromagnetic spectra, which incorporates a bent tepee or bent pyramidal aligned array of conical or pyramidal inverted sections that have at least two intrinsic angles of differing values aligned co-axially. These are arranged to naturally produce a reference and object waves that impinges on and illuminate a holographic plate or recording means to produce on-axis or in-line transmission and reflection holograms, including real time display. The technology is also applicable to the detection, identification, and/or decoding of genetic material, specifically DNA and the Human Genome.
    Type: Grant
    Filed: October 20, 2006
    Date of Patent: September 8, 2015
    Assignee: RAEMI INC.
    Inventor: Carl Raymond Amos
  • Patent number: 9115977
    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: Grant
    Filed: July 20, 2012
    Date of Patent: August 25, 2015
    Assignee: NATIONAL UNIVERSITY OF DEFENSE TECHNOLOGY
    Inventors: Shanyong Chen, Yifan Dai, Shengyi Li, Xiaoqiang Peng, Chao Xie, Yanglin Peng
  • Patent number: 9116259
    Abstract: A compact optical mount for adjust optical component in 3 dimensions. Based on the traditional 2D adjustable optical mount, its inner space is utilized for installing the third dimension angular adjustment. By virtue of its compact structure, convenient adjustment, high precision and good stability, the invention is suitable for adjusting small optics in 3 dimensions, by which the real optical axil can agree with the idea optical axil well to fast adjust the whole optical system.
    Type: Grant
    Filed: June 28, 2011
    Date of Patent: August 25, 2015
    Assignee: Shanghai Institute of Optics And Fine Mechanics, Chinese Academy of Sciences
    Inventors: Jianqiang Zhu, Fang Liu, Hongbiao Huang, Gengxiu Tang
  • Patent number: 8896840
    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: Grant
    Filed: April 25, 2012
    Date of Patent: November 25, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Isao Matsubara, Chung-Chieh Yu, Yasuyuki Unno, William Dallas
  • Patent number: 8830476
    Abstract: Methods and apparatuses provide holographic contact-free imaging of aerosol particles in an efficient manner. One apparatus for holographic imaging of an aerosol particle may include: a delivery device configured to deliver the particle into a region; a light source for outputting a first beam of light and a second beam of light, wherein the first beam travels into the region producing a first light wave which is un-scattered by the particle and a second light wave that is scattered by the particle, and the second beam does not travel into the region; a beam splitter for combining the second beam with the scattered light of the first beam into combined interference light; an image sensor for sensing an interference pattern created by the combined interference light; and an image processor configured to generate an image of the aerosol particle based on the sensed interference pattern.
    Type: Grant
    Filed: March 19, 2012
    Date of Patent: September 9, 2014
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Matthew J. Berg, Gorden Videen
  • 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
  • Patent number: 8791985
    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: Grant
    Filed: October 30, 2008
    Date of Patent: July 29, 2014
    Assignee: New York University
    Inventors: David G. Grier, Sang-Hyuk Lee, Fook C. Cheong
  • Patent number: 8687184
    Abstract: Reference cell (8) for use with a fiber optic probe (1) comprising a base wall (11), upstanding walls (12) each having an optical window (13, 15), and a top wall (14) having a further optical window (16) adapted to allow light to pass to and from a fiber optic probe. The base wall (11) comprises a reflector (19) which reflects incident light from the fiber optic probe back to said probe (1). The top wall (14) has an attachment for receiving an emitting and a receiving end of a fiber optic probe (1). The cell (8) allows use of standard fiber optic probe (1) with other optical equipment when the path length and the probe optical characteristics require validation to international standards. The calibration of the probe (1) is analogous to calibration of laboratory spectrophotometers and can therefore be validated. The device (8) enables probes (1) to be used for applications where precision and accuracy are essential.
    Type: Grant
    Filed: February 12, 2009
    Date of Patent: April 1, 2014
    Assignee: Starna Scientific Limited
    Inventors: Keith Hulme, John Hammond
  • Publication number: 20140022553
    Abstract: The invention relates to a method and arrangement for short coherence holography for distance measurement, for profile detection and/or for 3D detection of one or more object elements and/or object areas and/or objects or for readout of holographic volume memories with a holographic interferometer and with at least one short coherence light source. For each optically detected object element in the hologram the holographic interferometer has an optical path difference clearly unequal to zero. At least one spectrally integrally detecting, rastered detector is arranged. The short coherence light source with frequency comb is designed with the optical delay length Y1. Detected holograms are digitally reconstructed. Relative distances of object elements are digitally calculated from the hologram reconstructions, so that a 3D point cloud of object elements and/or object areas and/or objects is produced.
    Type: Application
    Filed: December 23, 2011
    Publication date: January 23, 2014
    Applicant: Universit-t Stuttgart
    Inventors: Klaus Kmer, Giancarlo Pedrini, Christof Prub, Wolfgang Osten
  • Patent number: 8477315
    Abstract: A volume hologram includes: an incidence surface onto which coherent light having a plurality of wavelengths is incident; and a plurality of interference fringes having streaks so that the angles between the streaks and the incidence surface are different from each other and so that the each interference fringe corresponds to one wavelength of the coherent light.
    Type: Grant
    Filed: February 4, 2008
    Date of Patent: July 2, 2013
    Assignee: Seiko Epson Corporation
    Inventor: Fumika Sumiyama
  • Patent number: 8451450
    Abstract: An optical system and associated method enable near real time optical phase conjugation. In the method, a translucent medium is illuminated by a sample illumination beam. Light scattered by the medium is directed to an electronic image sensor while a reference beam is also directed to the electronic image sensor. The scattered light and the reference beam form an interference pattern at the electronic image sensor. A digital representation of the interference pattern is recorded using the electronic image sensor, and the characteristics of a conjugate of the sample beam are computed from the numerical representation. A conjugate beam having the computed characteristics is generated using a configurable optical element and directed back to the translucent medium. The generation of the conjugate beam may be accomplished using a spatial light modulator.
    Type: Grant
    Filed: September 13, 2010
    Date of Patent: May 28, 2013
    Assignee: Bio-Rad Laboratories, Inc.
    Inventor: Xin Heng
  • Patent number: 8405059
    Abstract: Embodiments of the invention allow the operation of confocal microscopes with relatively open pinholes (e.g. 1 Airy unit) whilst still giving a significant XY resolution improvement. In addition axial (Z) discrimination or resolution may also be improved. This is achieved by splitting the emitted light path in an interferometric fashion. One of the split beams is then directed to an image transformation system, which may perform an image inversion which inverts at least one coordinate in image space. The transformed beam and the non-transformed beam are then recombined in an interferometric fashion (i.e. coherently added), which provides an interference effect resulting in increased resolution of the image. Where the embodiments are being used in a confocal application, the resulting combined beam can then be subject to a spatially discriminating means, such as a pinhole, or the like.
    Type: Grant
    Filed: February 1, 2008
    Date of Patent: March 26, 2013
    Assignee: King's College London
    Inventors: Rainer W Heintzmann, Kai Wicker
  • Patent number: 8115933
    Abstract: An interferometer for optically measuring an object (10), including a light source (1), at least one beam splitter (2) and at least one detector (12a, 12b), with the beam splitter being arranged in the beam path of the light source such that a light beam created by the light source is split into a working beam (3) and a reference beam (4). The interferometer is embodied such that the working beam impinges on the object (10) to be measured and the working beam is at least partially reflected by the object and interfered with the reference beam on the detector (12a, 12b).
    Type: Grant
    Filed: April 28, 2010
    Date of Patent: February 14, 2012
    Assignee: Polytec GmbH
    Inventors: Christian Rembe, Tobias Haist
  • Publication number: 20110141273
    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: Application
    Filed: October 2, 2009
    Publication date: June 16, 2011
    Inventor: Frank Dubois
  • Patent number: 7948632
    Abstract: A non-destructive method and device for analyzing a sample comprising transparent living and/or dead cells, by 5 means of a digital holographic microscope, where the sample (8) is exposed to light from a laser (2). The light that travels through the cells in the sample will experience a difference in the optical path length compared to the surrounding media and the wave front that emerges from the 10 cells will thus be phase shifted. This distortion can be detected in the digital hologram, which is reconstructed from the interference pattern detected by a digital sensor (17), such as a CCD or a CMOS, as phase differences or phase shifts and thereby creating a digital hologram. The 15 phase shift of each element of the hologram is then used for analyzing the characteristics of the cells in the sample.
    Type: Grant
    Filed: December 22, 2006
    Date of Patent: May 24, 2011
    Assignee: Phase Holographic Imaging PHI AB
    Inventors: Mats Gustafsson, Mikael Sebesta
  • Patent number: 7812959
    Abstract: The present invention provides for a digital holographic microscope using a holographic interferometer and incorporating a TIR sample mount and microscopic imaging optics. The microscope uses phase shifting from frustrated internal reflection within a prism to measure nanometric distances. The invention also provides for a numerical reconstruction algorithm of an inclined surface of the object/prism.
    Type: Grant
    Filed: March 24, 2008
    Date of Patent: October 12, 2010
    Assignee: University of South Florida
    Inventor: Myung K. Kim
  • Publication number: 20100165348
    Abstract: Disclosed are systems and methods for characterizing a nonlinear propagation environment by numerically propagating a measured output waveform resulting from a known input waveform. The numerical propagation reconstructs the input waveform, and in the process, the nonlinear environment is characterized. In certain embodiments, knowledge of the characterized nonlinear environment facilitates determination of an unknown input based on a measured output. Similarly, knowledge of the characterized nonlinear environment also facilitates formation of a desired output based on a configurable input. In both situations, the input thus characterized and the output thus obtained include features that would normally be lost in linear propagations. Such features can include evanescent waves and peripheral waves, such that an image thus obtained are inherently wide-angle, farfield form of microscopy.
    Type: Application
    Filed: December 2, 2009
    Publication date: July 1, 2010
    Applicant: OPTERYX LLC
    Inventors: Jason W. Fleischer, Christopher Barsi, Wenjie Wan
  • Patent number: 7725169
    Abstract: A method of forming an image of a sample includes performing SOCT on a sample. The sample may include a contrast agent, which may include an absorbing agent and/or a scattering agent. A method of forming an image of tissue may include selecting a contrast agent, delivering the contrast agent to the tissue, acquiring SOCT data from the tissue, and converting the SOCT data into an image. The contributions to the SOCT data of an absorbing agent and a scattering agent in a sample may be quantified separately.
    Type: Grant
    Filed: April 14, 2006
    Date of Patent: May 25, 2010
    Assignee: The Board of Trustees of the University of Illinois
    Inventors: Stephen A. Boppart, Chenyang Xu
  • Publication number: 20100060897
    Abstract: A non-destructive method and device for analyzing a sample comprising transparent living and/or dead cells, by 5 means of a digital holographic microscope, where the sample (8) is exposed to light from a laser (2). The light that travels through the cells in the sample will experience a difference in the optical path length compared to the surrounding media and the wave front that emerges from the 10 cells will thus be phase shifted. This distortion can be detected in the digital hologram, which is reconstructed from the interference pattern detected by a digital sensor (17), such as a CCD or a CMOS, as phase differences or phase shifts and thereby creating a digital hologram. The 15 phase shift of each element of the hologram is then used for analyzing the characteristics of the cells in the sample.
    Type: Application
    Filed: December 22, 2006
    Publication date: March 11, 2010
    Applicant: Phase Holographic Imaging PHI AB
    Inventor: Mats Gustafsson
  • Patent number: 7643149
    Abstract: A method of manufacturing an optical system having plural optical elements mounted relative to each other on a mounting structure of the optical system comprises disposing the optical system in a beam path of an interferometer apparatus having an interferometer optics and a selectable hologram for shaping a beam of measuring light to be incident on surfaces of the optical elements of the optical system; selecting a first hologram of the interferometer apparatus and recording at least one first interference pattern generated by measuring light reflected from a surface of a first optical element; selecting a second hologram of the interferometer apparatus, wherein the second hologram is different from the first hologram, and recording at least one second interference pattern generated by measuring light reflected from a surface of a second optical element, which is different from the first optical element; and adjusting a position of the first optical element relative to the second optical element on the mounti
    Type: Grant
    Filed: May 23, 2006
    Date of Patent: January 5, 2010
    Assignee: Carl Zeiss SMT AG
    Inventors: Rolf Freimann, Ulrich Wagemann
  • Patent number: 7639365
    Abstract: A confocal scanning holography microscope for use with a suitably selected detector for providing three dimensional information on the state of an object. The microscope has a coherent wavelength source for producing a coherent beam, scanning means for moving said coherent beam in a suitably selected pattern, and means for producing and focusing an object beam and a reference beam to an object focal point and a reference focal point, respectively. The object beam has a transmission path of essentially the same length of a transmission path of the reference beam. The object beam intercepts an object at the object focal point while the reference beam passes by the object. There are also means for defining the object beam and the reference beam based on the position of the object focal point and the geometry of the convergence angles and means for producing an interference pattern between the object focal point and the reference focal point.
    Type: Grant
    Filed: July 22, 2005
    Date of Patent: December 29, 2009
    Inventor: Rodney A. Herring
  • Publication number: 20090231593
    Abstract: A method of manufacturing an optical system having plural optical elements mounted relative to each other on a mounting structure of the optical system comprises disposing the optical system in a beam path of an interferometer apparatus having an interferometer optics and a selectable hologram for shaping a beam of measuring light to be incident on surfaces of the optical elements of the optical system; selecting a first hologram of the interferometer apparatus and recording at least one first interference pattern generated by measuring light reflected from a surface of a first optical element; selecting a second hologram of the interferometer apparatus, wherein the second hologram is different from the first hologram, and recording at least one second interference pattern generated by measuring light reflected from a surface of a second optical element, which is different from the first optical element; and adjusting a position of the first optical element relative to the second optical element on the mounti
    Type: Application
    Filed: May 23, 2006
    Publication date: September 17, 2009
    Applicant: Carl Zeiss SMT AG
    Inventors: Rolf Freimann, Ulrich Wagemann
  • Publication number: 20080291458
    Abstract: The present invention is connected with the holographic interferometry method and device that provides, to a very high precision, the reconstructing the original waveform of light emitted or reflected by an object. This method allows image resolution close to that of the wavelength of the light being used. The non-destructive method of holographic interferometry coupled with impulse heating of the test article to allow observation of its dynamic response to operating conditions, as described herein, is one of the most effective non-contact automated quality control methods available.
    Type: Application
    Filed: May 16, 2008
    Publication date: November 27, 2008
    Applicant: Enerize Corporation
    Inventors: Volodymyr Redko, Elena M. Shembel, Yurii V. Sokhach, Olexandr Kudrevatykh
  • Publication number: 20080158569
    Abstract: A device for testing a test object in particular a tire (10) by means of a non-destructive measuring method is provided with at least one measuring head (20) by which the test object (10) can be scanned to produce a measurement result. The device is also provided with a positioning means (30) by which the measuring head (20) can be moved between a park position (I) and a measuring position (II). The device is also provided with a pressure chamber in which the test object (10) can be subjected to a prescribed pressure. The device is further provided with a sub-frame (60) on which the test object (10) can be mounted during the test. The sub-frame (60) is supported on a first bearing element (61) by means of which the transmission of vibrations from a base (70) to the sub-frame (60) can be reduced.
    Type: Application
    Filed: December 21, 2007
    Publication date: July 3, 2008
    Inventors: Bernward Maehner, Stefan Dengler
  • Publication number: 20080137090
    Abstract: A method of manufacturing an optical element (5) comprises testing an optical surface (3) of the optical element, using an interferometer 1a directing measuring light (23a) onto the optical surface wherein the measuring light traverses two successive holograms (44, 48) disposed in the beam path of the measuring light upstream of the optical surface.
    Type: Application
    Filed: January 20, 2006
    Publication date: June 12, 2008
    Applicant: Carl Zeiss SMT AG
    Inventors: Jochen Hetzler, Susanne Beder, Heiko Feldmann
  • Patent number: 7145659
    Abstract: The present invention makes it possible to reliably hold a computer-generated hologram 17 and a sample surface 18a in ideal design positions and to perform interference measurements on the surface shape of the sample surface 18a by holding the computer-generated hologram 17 in a predetermined attitude by using a retaining member, and interposing a spacer 45 between this retaining member and the object so that relative positioning of both the computer-generated hologram 17 and the sample surface 18a is performed. Light transmission type targets used for alignment are respectively disposed on the four corners of the frame body of the CGH 17 and the four corners of the measurement mirror 18, and the system is devised so that images of these targets can be obtained by an image focusing lens 43 and CCD camera 44, thus making it possible to check the adjustment of the alignment of the CGH 17 and sample surface 18a.
    Type: Grant
    Filed: November 23, 2004
    Date of Patent: December 5, 2006
    Assignee: Fujinon Corporation
    Inventors: Kenji Yasuda, Shinichi Matsuda
  • Patent number: 7072042
    Abstract: An aspheric surface measuring apparatus includes an interferometer which generates incident light; a test piece having an aspheric surface from which the incident light is reflected as test light; a first optical element disposed on an optical path of the incident light, having at least one surface with a hologram for diffracting the incident light toward the test piece; and a second optical element disposed after the first optical element, which transmits the incident light toward the aspheric surface and has a concave surface to reduce an incident angle of the test light entering the hologram after having been reflected from the aspheric surface. Alternatively, a single optical element with a hologram and a concave surface can be used instead of the separate first and second optical elements. An extremely aspheric lens can be precisely measured using the apparatus.
    Type: Grant
    Filed: December 20, 2002
    Date of Patent: July 4, 2006
    Assignee: Samsung Electronics Co., LTD
    Inventors: Tae-hee Kim, James H. Burge
  • Patent number: 6963406
    Abstract: Systems and methods are described for rapid acquisition of fused off-axis illumination direct-to-digital holography. A method of recording a plurality of off-axis object illuminated spatially heterodyne holograms, each of the off-axis object illuminated spatially heterodyne holograms including spatially heterodyne fringes for Fourier analysis, includes digitally recording, with a first illumination source of an interferometer, a first off-axis object illuminated spatially heterodyne hologram including spatially heterodyne fringes for Fourier analysis; and digitally recording, with a second illumination source of the interferometer, a second off-axis object illuminated spatially heterodyne hologram including spatially heterodyne fringes for Fourier analysis.
    Type: Grant
    Filed: September 3, 2002
    Date of Patent: November 8, 2005
    Assignee: UT-Battelle, LLC
    Inventors: Jeffery R. Price, Philip R. Bingham
  • Patent number: 6930783
    Abstract: A method of aligning an optical system and an optical system incorporating the method. A hologram element is installed in the optical system so that test beams diffracted by the hologram element travel along a same optical path as test beams incident on the optical system. Alignment errors in the optical system are measured using interference patterns formed on an image surface by test beams returned from the optical system and reference beams. At least one optical element of the system is aligned using measurements calculated from the interference patterns. The optical system may provide for temporarily installing the hologram element to perform the measurements or the optical system may be constructed with a hologram formed on any optical element which may require alignment. A direction and a magnitude of any misalignment are determinable based on an appearance of the pattern and a number of circles in the pattern, respectively.
    Type: Grant
    Filed: September 19, 2002
    Date of Patent: August 16, 2005
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Tae-hee Kim
  • Patent number: 6922483
    Abstract: Methods for measuring the low spatial reflectivity uniformity of a DMD spatial light modulator. These methods are unique since they compensate for the non-uniformities introduced by the tilt angle of the DMD mirrors in addition to the normal system non-uniformities introduced by the illumination source and optics. These methods flatten the image and remove all but the low spatial non-uniformities from the DMD mirrors.
    Type: Grant
    Filed: December 21, 2000
    Date of Patent: July 26, 2005
    Assignee: Texas Instruments Incorporated
    Inventor: Dennis Lee Doane
  • Patent number: 6885449
    Abstract: An optical inspection system (10) for comparing surface structures of test and reference objects comprises a laser (12), a photorefractive crystal (24) and a detector (30). A refractive index grating corresponding to a diffraction pattern of a surface structure of the reference object is present within the photorefractive crystal (24) and acts as a spatial filter for light diffracted by surface structures of the test objects. If a surface structure of a test object matches that of the reference object, little or no light reaches the detector (30). If the surface structure of a text object differs from that of the reference object, light of greater power reaches the detector (30). The system (10) provides a simple pass/fail comparison test and light incident on the detector (30) requires no interpretation or other processing. The system (10) may be adapted to allow simple imaging of an edge of an object.
    Type: Grant
    Filed: August 7, 2000
    Date of Patent: April 26, 2005
    Assignee: Qinetiq Limited
    Inventor: Gary Cook
  • Patent number: 6870946
    Abstract: An apparatus and method for acquiring an image of a patterned object such as a fingerprint including a light refracting device, a focusing lens, a light source, and a biometric circuit for detecting the presence of a patterned object such as a fingerprint at the light refracting device. Incident light from the light source is projected through a light receiving surface of the light refracting device and is directly reflected off an imaging surface. The resulting image is projected through the focusing lens. The focusing lens has a diameter which is larger than the projection of the patterned object through the light refracting device.
    Type: Grant
    Filed: July 30, 1999
    Date of Patent: March 22, 2005
    Assignee: SecuGen Corporation
    Inventors: Harry H. Teng, Sung-Chan Jo