Having Polarization Patents (Class 356/491)
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Patent number: 8724117Abstract: Measuring of an electro-optic coefficient and a thermo-optic coefficient of an optical device and an optical material, and more specifically, to measurement systems and methods of evaluating the electro-optic and thermo-optic coefficients by using interference fringe measurement techniques, wherein those optical characteristics can be precisely measured over a wide wavelength intended without using a complicated measuring equipment.Type: GrantFiled: May 13, 2010Date of Patent: May 13, 2014Assignee: Inha Industry Partnership InstituteInventors: Kyong-Hon Kim, Seoung-Hun Lee, Seung-Hwan Kim, El-Hang Lee
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Publication number: 20140125989Abstract: Six-axis four-subdividing interferometer comprising a six-axis light splitting system and an interference module which are sequentially arranged along the incident direction of polarization orthogonal double-frequency laser, wherein the six-axis light splitting system comprises five 45-degree plane beam splitters and four 45-degree full-reflecting minors.Type: ApplicationFiled: January 10, 2014Publication date: May 8, 2014Applicants: Shanghai Micro Electronics Equipment Co., Ltd., Shanghai Institute of Optics And Fine Mechanics, Chinese Academy of SciencesInventors: Jianfang CHEN, Zhaogu Cheng, Ya Cheng, Huijie Huang, Feng Chi
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Publication number: 20140111791Abstract: Systems and methods are provided which derive target characteristics from interferometry images taken at multiple phase differences between target beams and reference beams yielding the interferometry images. The illumination of the target and the reference has a coherence length of less than 30 microns to enable scanning the phase through the coherence length of the illumination. The interferometry images are taken at the pupil plane and/or in the field plane to combine angular and spectroscopic scatterometry data that characterize and correct target topography and enhance the performance of metrology systems.Type: ApplicationFiled: October 18, 2013Publication date: April 24, 2014Inventors: Amnon Manassen, Ohad Bachar, Daria Negri, Boris Golovanevsky, Barak Bringoltz, Daniel Kandel, Yoel Feler, Noam Sapiens, Paykin Irina, Alexander Svizher, Meir Aloni, Guy Ben Dov, Hadar Shalmoni, Vladimir Levinski
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Patent number: 8699122Abstract: In a delay line interferometer inside a demodulator, with respect to polarization states of two split beams of light to be interfered with each other, p polarization and s polarization are reversed by a half beam splitter and, further, again multiplexed by the half beam splitter used for splitting so that interference beams of light are generated.Type: GrantFiled: June 30, 2010Date of Patent: April 15, 2014Assignee: Oclaro Japan, Inc.Inventor: Hideharu Mikami
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Publication number: 20140078511Abstract: An apparatus for separating polarization of light includes a rotatable beam splitter including an input for receiving light with a first polarization and an output for outputting light with a second polarization different from the first polarization. Rotation of the rotatable beam splitter changes the first polarization of the input light to the second polarization of the output light. An optical network and method are also set forth.Type: ApplicationFiled: May 21, 2012Publication date: March 20, 2014Applicant: LUNA INNOVATIONS INCORPORATEDInventors: Eric E. Sanborn, Mark E. Froggatt
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Patent number: 8670129Abstract: An integrated swept wavelength optical source uses a filtered ASE signal with an optical amplifier and tracking filter. This source comprises a micro optical bench, a source for generating broadband light, a first tunable Fabry Perot filter, installed on the bench, for spectrally filtering the broadband light from the broadband source to generate a narrowband tunable signal, an amplifier, installed on the bench, for amplifying the tunable signal, and a second tunable Fabry Perot filter, installed on the bench, for spectrally filtering the amplified tunable signal from the amplifier. A self-tracking arrangement is also possible where a single tunable filter both generates the narrowband signal and spectrally filters the amplified signal. In some examples, two-stage amplification is provided. The use of a single bench implementation yields a low cost high performance system. For example, polarization control between components is no longer necessary.Type: GrantFiled: September 3, 2009Date of Patent: March 11, 2014Assignee: Axsun Technologies, Inc.Inventors: Dale C. Flanders, Walid A. Atia, Mark E. Kuznetsov
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Patent number: 8630697Abstract: The present invention provides for the detection and display of polarization scrambling tissue without resolving the polarization state of the backscattered imaging beam. In one embodiment, we illuminate the tissue using two different polarizations. A first polarization determines a first image of high intensity while the second polarization determines a second image of low intensity. Comparison and combination of the first and second images determines tissue which scrambles the polarization in neighboring detection cells.Type: GrantFiled: June 22, 2012Date of Patent: January 14, 2014Assignee: Carl Zeiss Meditec, Inc.Inventors: Scott A. Meyer, Xing Wei
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Publication number: 20130329230Abstract: An optical sensing device including a source unit configured to generate a polychromatic light beam containing p-polarized beam and s-polarized beam; an interferometric unit configured to introduce birefringent retardation for generating optical path difference between the p-polarized beam and the s-polarized beam; a SPR sensing unit configured to receive both p-polarized beam and s-polarized beam and induce a SPR effect to the p-polarized beam associated with a target sample; and a detection unit for detecting target sample characteristics by obtaining an interference spectrum of the p-polarized beam and the s-polarized beam from the SPR sensing unit.Type: ApplicationFiled: June 8, 2012Publication date: December 12, 2013Applicants: City University of Hong Kong, The Chinese University of Hong KongInventors: Shu Yuen Wu, Ho Pui Ho, Chi-man Lawrence Wu, Siu-pang Ng
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Publication number: 20130329231Abstract: A laser interferometer and a method for operating a laser interferometer perform a differential position measurement by laser interferometry of two elements while offering a rotational degree of freedom to one of the elements using a reflecting sphere as a mirror for the laser beam. The laser interferometer and method do not require the object to be aligned with the rotation axis, but instead can track the object in off-centered geometries. This is achieved by employing the pointing of the reflected beam from the sphere as a feedback signal to realign the interferometer which then has a constant beam pointing to the center of the sphere in all cases. The laser interferometer and method keep the direction of the measurement constant. The laser interferometer and method are suitable for homodyne and heterodyne types of laser interferometer technology.Type: ApplicationFiled: November 11, 2011Publication date: December 12, 2013Applicant: PAUL SCHERRER INSTITUTInventors: Mirko Holler, Jörg Raabe
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Publication number: 20130329228Abstract: A phase-locked delay device, including: an input port configured to receive an input electromagnetic radiation pulse; said input pulse being to be propagated along a propagation direction and having a first linear polarization different from both a first direction, which is orthogonal to the propagation direction, and a second direction, which is orthogonal to the first direction and the propagation direction; an adjustable Babinet-Soleil module optically coupled to said input port, having a first polarization direction parallel to said first direction. The adjustable Babinet-Soleil module is structured to: provide from the input pulse a first pulse polarized along the first direction and a second pulse collinear to said first pulse and polarized along the second direction, and introduce an adjustable group delay between the first pulse and the second pulse ranging from a minim value ?Tm and a maximum value ?TM; the maximum value ?TM being a value greater than 10 fs.Type: ApplicationFiled: June 7, 2012Publication date: December 12, 2013Applicants: CONSIGLIO NAZIONALE DELLE RICERCHE, POLITECNICO DI MILANOInventors: Cristian Angelo MANZONI, Daniele BRIDA, Giulio Nicola Felice CERULLO
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Patent number: 8599385Abstract: Techniques and devices for measuring the distribution of polarization crosstalk in birefringence optical media including polarization maintaining fiber based on suppressing the number and magnitude of ghost interference peaks.Type: GrantFiled: May 14, 2010Date of Patent: December 3, 2013Assignee: General Photonics CorporationInventors: Xiaojun Chen, Xiaotian Steve Yao
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Patent number: 8575539Abstract: A detector apparatus and method for detecting radiation emitted from a target comprising: a first transmissive polarizer (302) for polarizing radiation incident on the target; a second transmissive polarizer (304) for polarizing the radiation emitted from the target (303) and absorbing any remaining light polarized by the first polarizer; and at least one reflective polarizer (306) arranged between the first and second transmissive polarizers.Type: GrantFiled: July 23, 2008Date of Patent: November 5, 2013Assignee: Molecular Vision LimitedInventors: Alan Mosley, Gihan Ryu, Hongjin Jiang
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Patent number: 8576405Abstract: A polarimeter based on coherent detection and a method for measuring the optical rotation of a polarized light beam by an optically active substance, while enabling the subtraction of background signals, are provided.Type: GrantFiled: September 23, 2009Date of Patent: November 5, 2013Assignee: Mellitor Ltd.Inventors: Doron Goldberg, Zeev Weissman, Yaniv Yacov
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Patent number: 8559014Abstract: High-resolution, common-path interferometric imaging systems and methods are described, wherein a light source generates and directs light toward a sample from different directions. An optical imaging system collects the resultant scattered and unscattered components. A variable phase shifting system adjusts the relative phase of the components. The interfered components are sensed by an image sensing system. The process is repeated multiple times with different phase shifts to form corresponding multiple electronic signals representative of raw sample images, which are processed by a signal processor to form a processed image. Multiple processed images, each corresponding to a different illumination azimuth angle, are combined to extend the system resolution.Type: GrantFiled: September 23, 2010Date of Patent: October 15, 2013Inventors: Hwan J. Jeong, David A. Markle
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Publication number: 20130265584Abstract: Embodiments generally relate to a light source and methods for minimizing temperature sensitivity of a light source light source. In one embodiment a light source includes a light-emitting diode, a light beam having an optical axis, a photodetector and a polarizer. The diode is operatively configured to emit the light beam. The beam splitter, positioned to intercept the light beam, includes a first optical surface operatively configured to reflect a first portion of the light beam and to transmit a second portion of the light beam therethrough. The photodetector is positioned to capture the first portion of the light beam after reflection by the beam splitter and operatively configured to generate photocurrent proportional to an intensity of that captured first portion. The polarizer is positioned between the diode and the beam splitter, and is operatively configured to polarize the light beam along a polarization direction perpendicular to its optical axis.Type: ApplicationFiled: April 5, 2013Publication date: October 10, 2013Inventor: Dubravko Ivan Babic
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Patent number: 8526005Abstract: A system and method of calibrating an optical measurement system utilizing polarization diversity is disclosed. A waveplate having a rotation axis is provided. A first light polarization component and a second light polarization component are caused to propagate in the waveplate while the waveplate is rotated about the rotation axis. An equal common phase shift is caused in the first and second light polarization components while a differential phase shift in the first and second light polarization components is maintained. A relative phase between the first and second light polarization components is sensed. At least one calibration parameter is determined based on the relative phase.Type: GrantFiled: September 28, 2010Date of Patent: September 3, 2013Assignee: Lockheed Martin CorporationInventors: James E. Mason, Melvin S. Ni, Gregory S. Feller
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Patent number: 8502988Abstract: According to one embodiment, a pattern inspection apparatus includes a light source, a beam splitter, a first optical system, a second optical system, a controller, a phase controller and a detector. The beam splitter splits an emitted light into first and second optical paths. The first optical system delivers the light to a first pattern and delivers a first reflected light from the first pattern. The second optical system delivers the light to a second pattern and delivers a second reflected light from the second pattern. The controller is provided on the optical path, and intensities of the first and second reflected lights are substantially equal. The phase controller is provided on the optical path, and phases of the first and second reflected lights are inverted. In addition, the detector detects a light that the first and second reflected lights are made to interfere with each other.Type: GrantFiled: July 13, 2010Date of Patent: August 6, 2013Assignee: Kabushiki Kaisha ToshibaInventor: Yusaku Konno
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Publication number: 20130188135Abstract: An image processing apparatus includes a tomographic image acquisition unit configured to acquire a polarization-sensitive tomographic image of a subject, and an extraction unit configured to extract, from the polarization-sensitive tomographic image of the subject, a region in which a polarization state is scrambled.Type: ApplicationFiled: January 16, 2013Publication date: July 25, 2013Applicant: CANON KABUSHIKI KAISHAInventor: CANON KABUSHIKI KAISHA
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Publication number: 20130188137Abstract: An imaging apparatus includes a polarization adjustment member configured to adjust a polarization state of a measuring beam, a planar image acquisition unit configured to acquire, in a case where the polarization adjustment member is removed from an optical path of the measuring beam, a planar image of a subject, and a tomographic image acquisition unit configured to acquire, in a case where the polarization adjustment member is inserted in the optical path of the measuring beam, a tomographic image of the subject.Type: ApplicationFiled: January 16, 2013Publication date: July 25, 2013Applicant: CANON KABUSHIKI KAISHAInventor: Canon Kabushiki Kaisha
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Patent number: 8494360Abstract: A system may include a first measurement device configured to be coupled to a first node in an optical path being measured. The first measurement device may be configured to generate a signal at an initiating device; identify an unused channel in an optical path, wherein the optical path includes at least two spans; and transmit the signal on the unused channel. A second test device may be configured to be coupled to a last node in the optical path being measured. The second measurement device may be configured to: receive the signal at a destination device; compensate the signal for chromatic dispersion (CD) and/or polarization mode dispersion (PMD) effects; and determine CD and/or PMD measurements associated with the optical path being measured based on the compensation.Type: GrantFiled: April 24, 2009Date of Patent: July 23, 2013Assignee: Verizon Patent and Licensing Inc.Inventor: David Zhi Chen
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Publication number: 20130176573Abstract: An interferometer for controlling the coalescence of a pair of photons, including: an optical source, which generates a first and a second pump pulse coherent with each other and shifted in time by a delay; and a first interferometric stage, which receives the first pump pulse and generates an antisymmetric state with two coalescent photons (1/?{square root over (2)}(|21,02?|01,22)). The interferometer also includes a second interferometric stage, which receives the second pump pulse and generates a symmetric state with two coalescent photons (1/?{square root over (2)}·(|21,02+|01,22)), the first and the second interferometric stages being connected in a manner such that the interferometer outputs a final state equal to a weighted sum of the antisymmetric state and of the symmetric state (1/?{square root over (2)}·(|21,02+|01,22)+ei?·1/?{square root over (2)}·(|21,02?|01,22)), the weights of the sum being a function of the delay.Type: ApplicationFiled: July 6, 2012Publication date: July 11, 2013Applicant: SELEX SISTEMI INTEGRATI S.P.A.Inventor: Fabio Antonio Bovino
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Patent number: 8472031Abstract: An interrogation apparatus and method use a partial shear optical interference apparatus to interrogate the optical properties of an array of target specimen probe volumes as compared to an array of reference sample probe volumes. The apparatus produces a formatted probe beam that contains a partially sheared probe beam pair that is formatted into an array of completely sheared probe beam pairs. Target specimen probe volumes and reference sample probe volumes are suitably organized and exposed to the array of completely sheared probe beam pairs.Type: GrantFiled: May 25, 2010Date of Patent: June 25, 2013Inventors: Giovanni Barbarossa, Yan Zhou
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Patent number: 8462349Abstract: Systems and methods are described herein for a self-referencing interferometer. The interferometer can comprise an improved spatial phase shifter that reduces the number of components, size and complexity of the spatial phase shifter and maintains a common path for a combined reference beam and signal beam. The self-referencing interferometer further comprises a single mode fiber shunt for filtering the reference beam and further reducing the size of the interferometer. The angle of the reference beam can be tilted before being recombined with the single beam which further simplifies the spatial phase shifting component of the interferometer.Type: GrantFiled: July 20, 2010Date of Patent: June 11, 2013Assignee: Science Applications International CorporationInventors: Troy Rhoadarmer, Eric Berg
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Patent number: 8461822Abstract: A fiber optic current or magnetic field sensor uses a sensing fiber in a coil for measuring a current or a magnetic field and has a retarder for converting between linearly polarized light and elliptically polarized light. The retardation of the retarder, its temperature dependence as well as its azimuth angle in respect to the plane of the fiber coil are optimized in dependence of the birefringence in the sensing fiber in order to minimize the influence of temperature variations and manufacturing tolerances on the overall scale factor of the sensor.Type: GrantFiled: September 24, 2010Date of Patent: June 11, 2013Assignee: ABB Research LtdInventors: Robert Wueest, Andreas Frank, Klaus Bohnert
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Patent number: 8428259Abstract: The present invention relates to an apparatus and method for the encryption and decryption of optically transmitted data, and more particularly to the encryption and decryption of optical data transmitted and received using only optical components. Because only optical components are used, the encryption and decryption is independent of the data rate of the optical signal. The apparatus may include an encryption device that operates by receiving and combining both an unencrypted optical signal as well as a delayed optical signal that is based on the unencrypted optical signal. An optical delay may be configured in a number of different ways and may be used for delaying the unencrypted optical signal. The apparatus may further include a decryption device that receives and combines an encrypted optical signal as well as a delayed optical signal that is based on the encrypted optical signal.Type: GrantFiled: June 9, 2005Date of Patent: April 23, 2013Assignee: General Dynamics Advanced Information SystemsInventor: James P. Waters
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Publication number: 20130027713Abstract: White-light snapshot channeled linear imaging (CLI) polarimeters include polarization gratings (PGs) configured to produce a compensated shear between portions of an input light flux in first and second polarization states. The disclosed CLI polarimeters can measure a 2-dimensional distribution of linear Stokes polarization parameters by incorporating two identical PGs placed in series along an optical axis. In some examples, CLI polarimeters are configured to produce linear (S0, S1, and S2) and complete (S0, S1, S2 and S3) channeled Stokes images.Type: ApplicationFiled: February 17, 2012Publication date: January 31, 2013Inventor: Michael W. Kudenov
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Publication number: 20130021616Abstract: Provided is an optical apparatus characterized in that alight from a light source is split to a first light and a second light, and the first light is focused onto an observation object, that an optical filter having a light shielding region for high resolution is disposed in at least one optical path selected from optical paths of the first light, second light and response light from the observation object, that an interference light formed by causing interference between the response light and the reference light in polarized states different from each other is split to multiple beams, and desired amplitude information signals are obtained from the multiple beams through a phase plate and a polarization plate to increase intensity of the second light, whereby the signal to noise ratio is improved.Type: ApplicationFiled: July 11, 2012Publication date: January 24, 2013Inventor: Shigeharu KIMURA
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Patent number: 8358466Abstract: Delay line interferometer designs using combinations of basic optical components that are expected to simplify manufacture and reduce costs while still providing precision optical performance. The main operative components of these designs are polarization beam splitters, birefringent crystals, optical delay components, and waveplates. Temperature controllers may be provided for adjusting the delay of the optical delay components.Type: GrantFiled: September 14, 2009Date of Patent: January 22, 2013Assignee: Oclaro (North America), Inc.Inventors: Ming Cai, Ruibo Wang
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Patent number: 8351048Abstract: A phase-difference sensor measures the spatially resolved difference in phase between orthogonally polarized reference and test wavefronts. The sensor is constructed as a linear-carrier phase-mask aligned to and imaged on a linear-carrier detector array. Mireau and Fizeau polarization interferometric objectives are implemented with a thin conductive wire grid optically coupled to the objective beam splitter.Type: GrantFiled: August 16, 2010Date of Patent: January 8, 2013Assignee: 4D Technology CorporationInventor: James E. Millerd
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Publication number: 20120293805Abstract: An interference measuring apparatus comprises a light source module, a beam splitter, a first lens module, a reflecting module, a second lens module, and a detection device. A light beam generated from the light source module can be projected on the beam splitter. The beam splitter splits the light beam to generate a first light beam and a second light beam. The first light beam passes through the first lens module and then projects onto the reflecting module, and the second light beam passes through the second lens module and projects onto an object. Furthermore, the first light beam and the second light beam are reflected by the reflecting module and the object, respectively, then both the first light beam and the second light beam are leaded to the detection device to form an interference pattern for obtaining the contours and internal cross-sectional image of the object.Type: ApplicationFiled: July 6, 2012Publication date: November 22, 2012Inventors: Chien-Chung TSAI, Dong-Yo Jheng, Yu-Ta Wang, Yen-Sheng Lin, Kuang-Yu Hsu, Sheng-Lung Huang
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Publication number: 20120268745Abstract: Snapshot imaging Fourier transform spectrometers include a lens array that produces sub-images that are directed through a birefringent interferometer in orthogonal polarization eigenstates that acquire an optical path difference. Interference patterns based on this OPD can be Fourier transformed to obtain a spectral image. In some examples, polarizing gratings provide a spatial heterodyne frequency and offset the spectra.Type: ApplicationFiled: April 20, 2012Publication date: October 25, 2012Inventor: Michael W. Kudenov
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Patent number: 8289524Abstract: An interferometer includes a light source, adapted to generate a coherent light beam, a detector adapted to analyze the phase difference of optical light beams, a location unit for locating an object to be measured, a first optical path from the light source to the object and a second optical path from the object to the detector. The first and the second optical path have a common section adjacent to the object. An optical polarization modulator has been arranged in the first path.Type: GrantFiled: July 16, 2009Date of Patent: October 16, 2012Assignee: Mitutoyo CorporationInventor: Maarten J. Jansen
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Publication number: 20120258123Abstract: The present invention inter alia provides a method, and uses thereof, of predicting statin-induced muscle toxicity or its complications, such as myalgia, myopathy and rhabdomyolysis, by detecting the lipid concentrations or lipid-lipid concentration ratios of a biological sample and comparing them to a control. This method has identified lipid markers that are more specific and sensitive in detecting these statin-induced muscle toxicity than the currently utilized clinical markers. Also provided is an antibody towards said lipids, and the use thereof for predicting, diagnosing, statin-induced muscle toxicity. The invention additionally relates to kits comprising lipids and/or an antibody thereto, for use in the prediction and/or diagnosis of statin-induced muscle toxicity.Type: ApplicationFiled: December 21, 2011Publication date: October 11, 2012Applicant: Zora Biosciences OyInventors: Reijo Laaksonen, Kim Ekroos, Reini Hurme, Minna Jänis, Riikka Katainen, Kirill Tarasov
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Publication number: 20120250027Abstract: A surface wave assisted system having an aperture layer with a surface and an aperture, and a plurality of grooves around the aperture. The plurality of grooves is configured to generate an optical transfer function at the aperture by inducing a surface wave for interfering with transmission of light of a range of spatial frequency.Type: ApplicationFiled: January 5, 2012Publication date: October 4, 2012Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGYInventors: Guoan Zheng, Xiquan Cui, Xin Heng, Changhuei Yang, Axel Scherer
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Patent number: 8279446Abstract: An apparatus for measuring a layered object comprising a low coherence light source, a coherent light source, and an interferometer including a reference arm and a measurement arm. The reference arm is comprised of a first section of polarization maintaining optical fiber engaged with a first fiber stretcher. The measurement arm is comprised of a second section of polarization maintaining optical fiber engaged with a second fiber stretcher. The first and second fiber stretchers are driven so as to alternatingly vary the lengths of the first section of polarization maintaining optical fiber and the second section of polarization maintaining optical fiber, thereby causing interference signals with the low coherence light when the length of the reference arm is equal to the length of the measurement arm including the distance from the second section of polarization maintaining optical fiber to any of the surfaces of the layers of the object.Type: GrantFiled: July 19, 2011Date of Patent: October 2, 2012Assignee: Lumetrics, Inc.Inventors: Filipp V Ignatovich, Todd Blalock
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Publication number: 20120242999Abstract: Systems and method are disclosed for measuring small angular deflections of a target using weak value amplification. A system includes a beam source, a beam splitter, a target reflecting surface, a photodetector, and a processor. The beam source generates an input beam that is split into first and second beams by the beam splitter. The first and second beams are propagated to the target reflecting surface, at least partially superimposed at the target reflecting surface, and incident to the target reflecting surface normal to the target reflecting surface. The first beam is reflected an additional even number of times during propagation to the photodetector. The second beam is reflected an additional odd number of times during propagation to the photodetector. The first and second beams interfere at the photodetector so as to produce interference patterns. The interference patterns are interpreted to measure angular deflections of the target reflecting surface.Type: ApplicationFiled: March 21, 2012Publication date: September 27, 2012Applicant: University of Washington through its Center for CommercializationInventors: Matthew D. Turner, Jens H. Gundlach, Charles A. Hagedorn, Stephan Schlamminger
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Publication number: 20120236315Abstract: An interferometer includes an optical assembly for directing an input optical field, a space-variant polarization converter, and an analyzer. The optical assembly is configured and operable to produce first and second spatially separated optical fields of incident coherent radiation of substantially the same intensity and different polarizations and to define first and second spatially separated optical paths for propagation of said first and second optical fields thereby allowing interaction between the first optical field and an element affecting a phase thereof in said first optical path. The space-variant polarization converter is accommodated in said combined path and being configured and operable to simultaneously apply space-variant polarization conversion to two beams corresponding to combined first and second optical fields having different polarizations and produce radially and azimuthally polarized beams respectively. The analyzer is located downstream of said polarization converter.Type: ApplicationFiled: November 30, 2010Publication date: September 20, 2012Applicant: YISSUM RESEARCH DEVELPMENT COMPANY OF THE HEBREW UNIVERSITY OF JERUSALEMInventors: Uriel Levy, Gilad Lerman
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Publication number: 20120224165Abstract: Systems, devices and methods of producing an image are provided. A electro-magnetic radiation source provides electro-magnetic radiation to a sample and a reference. A detector/interferogram unit produces at least one interferogram that is supplied to a signal processing unit. The signal processing unit extracts phase, magnitude, and/or polarization data from the supplied signals, and produces an image based on at least the extracted data.Type: ApplicationFiled: March 6, 2012Publication date: September 6, 2012Applicant: NinePoint Medical, Inc.Inventors: Eric A. Swanson, Eman Namati, Michael Madden, J. Christopher Flaherty
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Publication number: 20120224184Abstract: An optical detector for detecting an optical signal beam (OSB) modulated in a way that it includes an in-phase and/or a quadrature component, includes: a polarisation beam splitter arranged to split the OSB into two polarised OSBs; a non-polarisation beam splitter arranged to further split each of the two polarised OSBs into two split polarised OSBs; at least one birefringent element providing a phase shift, the birefringent element being arranged in a path of at least one polarised OSB and/or in a path of at least one split polarised OSB so that an in-phase and quadrature phase offset between two split polarised OSBs originating from the same polarised OSB is formed in output signal beams; and at least two detection means arranged to receive at least one output signal beam that includes a in-phase and/or quadrature component of the OSB.Type: ApplicationFiled: March 5, 2012Publication date: September 6, 2012Applicant: KARLSRUHER INSTITUT FUR TECHNOLOGIEInventors: Jingshi LI, Matthias Lauermann, Sven Schüle, Juerg Leuthold, Wolfgang Freude
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Publication number: 20120224183Abstract: An interferometry method for determining information about a test object includes directing test light to the test object positioned at a plane, wherein one or more properties of the test light vary over a range of incidence angles at the plane, the properties of the test light being selected from the group consisting of the spectral content, intensity, and polarization state; subsequently combining the test light with reference light to form an interference pattern on a multi-element detector so that different regions of the detector correspond to different angles of the test light emerging from the test object, wherein the test and reference light are derived from a common source; monitoring the interference pattern using the multi-element detector while varying an optical path difference between the test light and the reference light; determining the information about the test object based on the monitored interference pattern.Type: ApplicationFiled: February 29, 2012Publication date: September 6, 2012Applicant: Zygo CorporationInventors: Martin Fay, Jan Liesener, Xavier Colonna de Lega
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Publication number: 20120218558Abstract: An optical imaging device which receives an optical collimated input beam, the device having a pair of axicon lenses through which a beam is directed to generate a collimated ring beam, wherein the ring beam is scattered from a substance to generate a return beam, and to bypass a reflector that redirects the return beam to prevent the return beam from interfering with the input beam; and a detector which detects an image projected by the return beam.Type: ApplicationFiled: October 1, 2010Publication date: August 30, 2012Applicant: THUNDER BAY REGIONAL RESEARCH INSTITUTEInventors: Andrew T. Cenko, Jeffrey T. Meade, Arsen R. Hajian, Jae K. Kim
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Patent number: 8238556Abstract: A quantum communication system comprising a sending unit and a receiving unit, said sending unit comprising a photon source assembly configured to output a stream of pulses of light having at least two different intensities and a memory configured to store information for determining which pulses should be reference pulses and which pulses should be data pulses, the average intensity of reference pulses being different to the average intensity of data pulses, the receiving unit comprising a memory for storing information for identifying the position of reference pulses within the stream of pulses and a processor for determining the calibration of the quantum communication system from the reference pulses.Type: GrantFiled: September 8, 2006Date of Patent: August 7, 2012Assignee: Kabushiki Kaisha ToshibaInventors: Zhiliang Yuan, Andrew James Shields
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Publication number: 20120176622Abstract: Snapshot imaging polarimeters comprise Sagnac interferometers that include diffraction gratings situated to produce shear between counter-propagating optical fluxes produced by a polarizing beam splitter. The counter-propagating, sheared optical fluxes are focused onto a focal plane array to produce fringe patterns. The fringe patterns correspond to a scene polarization distribution modulated onto a spatial carrier frequency associated with a diffraction order. Multi-blazed gratings can be used so that modulations at a plurality of spatial frequencies are produced, with each spatial frequency corresponding to a spectral component of an input optical flux. Modulated fringe patterns can be demodulated to obtain scene Stokes parameter distributions.Type: ApplicationFiled: September 2, 2011Publication date: July 12, 2012Inventor: Michael W. Kudenov
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Patent number: 8208996Abstract: The present invention provides for the detection and display of polarization scrambling tissue without resolving the polarization state of the backscattered imaging beam. In one embodiment, we illuminate the tissue using two different polarizations. A first polarization determines a first image of high intensity while the second polarization determines a second image of low intensity. Comparison and combination of the first and second images determines tissue which scrambles the polarization in neighboring detection cells.Type: GrantFiled: March 10, 2009Date of Patent: June 26, 2012Assignee: Carl Zeiss Meditec, Inc.Inventors: Scott A. Meyer, Xing Wei
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Patent number: 8199328Abstract: A polarimeter based on a modified Fizeau interferometer and a method for measuring the optical rotation of a polarized light beam by an optically active substance using the polarimeter, are provided.Type: GrantFiled: November 26, 2008Date of Patent: June 12, 2012Assignee: Mellitor Ltd.Inventors: Doron Goldberg, Zeev Weissman
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Publication number: 20120140239Abstract: A method for real-time monitoring thin film deposition using a dynamic interferometer is revealed. An optical monitoring extracting the temporal phase change of the reflection coefficient of the deposition film stacks. The dynamic interferometer, which gets rid of the influence of vibration and air turbulence, was used in the method to directly detect fluctuating phase of a deposition film stack. Combing with the reflectance or transmittance measurements, the real-time reflection coefficient under normal incidence of monitoring light can be found as well as optical admittance for enhancing the error compensation of the thin film deposition.Type: ApplicationFiled: June 3, 2011Publication date: June 7, 2012Inventors: Cheng-Chung LEE, Kai Wu
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Patent number: 8187541Abstract: An apparatus for analysis of a sample and in particular of a biological sample. The apparatus contains a microfluidic chip with dies, adapted to be selectively activated or deactivated by presence of target molecules in the biological sample. The apparatus further contains a light source to emit light for illumination of the microfluidic chip and an optical filter to allow passage of the light from the dies once activated or deactivated by the presence of the target molecules. A method for pressurizing a microfluidic chip is also disclosed, where a chamber is provided, the chamber is connected with the microfluidic chip and pressure is applied to the chamber.Type: GrantFiled: September 18, 2007Date of Patent: May 29, 2012Assignee: California Institute of TechnologyInventors: George Maltezos, Jeremy Witzens, Axel Scherer
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Publication number: 20120120407Abstract: A method of analysis of a sample, including the steps of: (a) splitting an input optical beam into a probe beam and reference beam; (b) utilizing the probe beam to interrogate a sample and obtaining a return sample beam there from; (c) manipulating the reference beam into a predetermined polarization state; (d) mixing the return sample beam and reference beam producing a series of mixed beams; and (e) analyzing the polarization components of the series of mixed beams.Type: ApplicationFiled: November 16, 2011Publication date: May 17, 2012Applicant: FINISAR CORPORATIONInventors: Steven James Frisken, Daniel Royston Neill
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Patent number: 8166825Abstract: Method and apparatus for noise reduction in ultrasound detection with the steps of: an optical interferometer having a reference arm and a signal arm that includes a polarization-maintaining probing fiber having a reflective coating at a distal end, a way to couple the probing fiber to ultrasound, a way to generate two output beams from the interferometer, a device to modulate the polarization state of the light in the probing fiber, and a detection mechanism responsive to the ultrasonic signals at the distal tip of the probing fiber.Type: GrantFiled: April 16, 2010Date of Patent: May 1, 2012Assignee: Tea Time Partners, L.P.Inventor: Gan Zhou
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Patent number: 8169617Abstract: There is disclosed a phase sensitive surface plasmon resonance sensing apparatus wherein a testing beam may be reflected from a sensing surface at a plurality of angles. There are also disclosed methods for surface plasmon resonance sensing.Type: GrantFiled: March 20, 2009Date of Patent: May 1, 2012Assignee: The Chinese University of Hong KongInventors: Ho Pui Ho, Siu Kai Kong, Yick Keung Suen, Kwong Chun Lo, Shu Yeun Wu, Wing Wai Wong