公开(公告)号：US09939322B2

公开(公告)日：2018-04-10

申请号：US15542425

申请日：2016-01-08

Applicant: Apple Inc.

Inventor： Miikka M. Kangas ,  Michael J. Bishop ,  Robert Chen ,  David I. Simon ,  Harold L. Sontag, III ,  George Dee Skidmore

IPC: G01J5/08 ,  G01J4/04 ,  G01J5/20

CPC classification number: G01J5/0825 ,  G01J4/04 ,  G01J5/0225 ,  G01J5/0846 ,  G01J5/0853 ,  G01J5/20 ,  G01J2005/202

Abstract: This relates to sensor systems, detectors, imagers, and readout integrated circuits (ROICs) configured to selectively detect one or more frequencies or polarizations of light, capable of operating with a wide dynamic range, or any combination thereof. In some examples, the detector can include one or more light absorbers; the patterns and/or properties of a light absorber can be configured based on the desired measurement wavelength range and/or polarization direction. In some examples, the detector can comprise a plurality of at least partially overlapping light absorbers for enhanced dynamic range detection. In some examples, the detector can be capable of electrostatic tuning for one or more flux levels by varying the response time or sensitivity to account for various flux levels. In some examples, the ROIC can be capable of dynamically adjusting at least one of the frame rate integrating capacitance, and power of the illumination source.

公开(公告)号：US09933357B1

公开(公告)日：2018-04-03

申请号：US15530584

申请日：2017-02-03

Applicant: J.A. WOOLLAM CO., INC.

Inventor： Ping He ,  Gregory K. Pribil ,  Martin M. Liphardt

IPC: G01N21/21

CPC classification number: G01N21/211 ,  G01J3/0286 ,  G01J4/04 ,  G01N2201/0227 ,  G01N2201/023 ,  G01N2201/084

Abstract: An ellipsometer system with polarization state generator and polarization state analyzer components inside at least one internal environment supporting encasement, said at least one encasement being present inside said environmental chamber.

公开(公告)号：US09903805B2

公开(公告)日：2018-02-27

申请号：US15647106

申请日：2017-07-11

Applicant: Theodore Peter Rakitzis

Inventor： Theodore Peter Rakitzis

IPC: G01N21/19 ,  G01J4/04 ,  G01J4/02 ,  G01N21/21 ,  G01J4/00

CPC classification number: G01N21/19 ,  G01J4/02 ,  G01J4/04 ,  G01J2004/001 ,  G01N21/21 ,  G01N2201/06113 ,  G01N2201/0636 ,  G01N2201/067

Abstract: A polarimeter for measuring chirality of a material comprising an optical ring cavity comprising a plurality of reflective elements configured to promote bi-directional propagation of a laser beam within the cavity, a laser-emitting device configured to introduce a first input beam and a second input beam into the cavity, a Faraday rotator, a phase compensator, an acousto-optic modulator configured to shift the frequency of the first output beam, an optical recombination device configured to recombine shifted and unshifted output beams, and first and second detectors configured to receive the recombined beams, wherein the plurality of reflective elements, Faraday rotator, and phase compensator are configured such that light from the first and second input beams passes through a chiral material located within the cavity a sufficient number of times for a measurement of optical rotary dispersion and circular dichroism of light transmitted through the material to be obtained at the detectors.

公开(公告)号：US20180031424A1

公开(公告)日：2018-02-01

申请号：US15222503

申请日：2016-07-28

Applicant: KLA-Tencor Corporation

Inventor： Andrew V. Hill ,  Amnon Manassen ,  Yuri Paskover ,  Yuval Lubashevsky

IPC: G01J4/04 ,  G01B11/27

CPC classification number: G01J4/04 ,  G01B11/272 ,  G03F7/70633

Abstract: Metrology methods and systems are provided, in which the detected image is split at a field plane of the collection path of the metrology system's optical system into at least two pupil plane images. Optical elements such as prisms may be used to split the field plane images, and multiple targets or target cells may be measured simultaneously by spatially splitting the field plane and/or the illumination sources and/or by using two polarization types. The simultaneous capturing of multiple targets or target cells increases the throughput of the disclosed metrology systems.

公开(公告)号：US20180005012A1

公开(公告)日：2018-01-04

申请号：US15450948

申请日：2017-03-06

Applicant: Polaris Sensor Technologies, Inc.

Inventor： Todd M. Aycock ,  David B. Chenault ,  Jonathan B. Hanks ,  John S. Harchanko

IPC: G06K9/00 ,  G06K9/62 ,  G06K9/46 ,  G06K9/20 ,  G01V8/10 ,  H04N9/64 ,  G01J4/04

CPC classification number: G06K9/0063 ,  G01J4/04 ,  G01V8/10 ,  G02B5/201 ,  G02B27/288 ,  G06K9/00255 ,  G06K9/00664 ,  G06K9/2018 ,  G06K9/209 ,  G06K9/4661 ,  G06K9/6267 ,  H04N9/646

Abstract: A method for detecting and tracking aerial objects and vehicles comprises recording raw image data using a polarimeter to obtain polarized images of the sky. The images are then corrected for non-uniformity, optical distortion, and registration. IR and polarization data products are computed, and the resultant data products are converted to a multi-dimensional data set for exploitation. Contrast enhancement algorithms are applied to the multi-dimensional imagery to form enhanced object images. The enhanced object images may then be displayed to a user, and/or an annunciator may announce the presence of an object.

公开(公告)号：US20170315050A1

公开(公告)日：2017-11-02

申请号：US15647106

申请日：2017-07-11

Applicant: Theodore Peter Rakitzis

Inventor： Theodore Peter Rakitzis

IPC: G01N21/21

CPC classification number: G01N21/19 ,  G01J4/02 ,  G01J4/04 ,  G01J2004/001 ,  G01N21/21 ,  G01N2201/06113 ,  G01N2201/0636 ,  G01N2201/067

Abstract: A polarimeter for measuring chirality of a material comprising an optical ring cavity comprising a plurality of reflective elements configured to promote bi-directional propagation of a laser beam within the cavity, a laser-emitting device configured to introduce a first input beam and a second input beam into the cavity, a Faraday rotator, a phase compensator, an acousto-optic modulator configured to shift the frequency of the first output beam, an optical recombination device configured to recombine shifted and unshifted output beams, and first and second detectors configured to receive the recombined beams, wherein the plurality of reflective elements, Faraday rotator, and phase compensator are configured such that light from the first and second input beams passes through a chiral material located within the cavity a sufficient number of times for a measurement of optical rotary dispersion and circular dichroism of light transmitted through the material to be obtained at the detectors.

公开(公告)号：US09784622B2

公开(公告)日：2017-10-10

申请号：US15426364

申请日：2017-02-07

Applicant: THE UNITED STATES OF AMERICA AS REPRESETNED BY THE SECRETARY OF THE AIR FORCE

Inventor： David H. Hughes ,  Reinhard Erdmann

IPC: G01J4/00 ,  G01J4/02 ,  G02B5/30 ,  G02B27/28

CPC classification number: G01J4/02 ,  G01J4/04 ,  G02B5/3083 ,  G02B27/283 ,  G02B27/286 ,  G02B27/288 ,  G02B2207/114

Abstract: A photon entanglement router comprises a modified birefringent spectral filter followed by a polarization beam splitter (PBS). Frequency degenerate or non-degenerate entangled photons, generated by a collinear laser source and incident on one input port of the photon entanglement router, are comprised of congruent photons and/or incongruent photons. The invention adds a plurality of additional filter stacks at each output port such that they invert the action of the first birefringent stack at the input port. Intermediate output photons from the invention is input to two ports of an additional PBS where they are spatially projected according to their frequencies and polarizations. Two congruent photons of an entangled photon pair exit as an entangled pair in one direction, while two incongruent photons exit as an entangled pair in the orthogonal direction. If one photon is congruent and the other photon incongruent, the photons remain entangled but are spectrally divided into orthogonal directions. The invention's birefringent spectral filter accepts specific input frequencies from the ITU optical C-band grid for proper operation.

公开(公告)号：US09741163B2

公开(公告)日：2017-08-22

申请号：US14978265

申请日：2015-12-22

Applicant: Raytheon Company

Inventor： Eric C. Fest

IPC: G06T17/00 ,  G06T7/60 ,  G06T15/20 ,  G06T15/50 ,  G06T7/00

CPC classification number: G06T17/00 ,  G01B11/24 ,  G01J4/04 ,  G06T7/004 ,  G06T7/60 ,  G06T15/20 ,  G06T15/50 ,  G06T2200/04

Abstract: A system and method for more accurately generating the surface normal calibration maps φ(AoLP) and θ(DoLP,φ) to compensate for structured scene reflections for 3-D polarimetric imaging. This is accomplished using a microfacet scattering model to develop the functional form of a polarized bidirectional reflectance distribution function (BRDF) of the object surface. The ambient radiance is ray traced to the BRDF to create the calibration maps φ(AoLP) and θ(DoLP,φ), which may be combined into a single calibration map θ(DoLP, AoLP). These maps are applied to the AoLP and DoLP images to compute an array of surface normals, which are then mapped to form a 3-D image of the object.

公开(公告)号：US20170178399A1

公开(公告)日：2017-06-22

申请号：US14978265

申请日：2015-12-22

Applicant: Raytheon Company

Inventor： Eric C. Fest

IPC: G06T17/00 ,  G06T7/00 ,  G06T15/50 ,  G06T7/60 ,  G06T15/20

CPC classification number: G06T17/00 ,  G01B11/24 ,  G01J4/04 ,  G06T7/004 ,  G06T7/60 ,  G06T15/20 ,  G06T15/50 ,  G06T2200/04

Abstract: A system and method for more accurately generating the surface normal calibration maps φ(AoLP) and θ(DoLP,φ) to compensate for structured scene reflections for 3-D polarimetric imaging. This is accomplished using a microfacet scattering model to develop the functional form of a polarized bidirectional reflectance distribution function (BRDF) of the object surface. The ambient radiance is ray traced to the BRDF to create the calibration maps φ(AoLP) and θ(DoLP,φ), which may be combined into a single calibration map θ(DoLP, AoLP). These maps are applied to the AoLP and DoLP images to compute an array of surface normals, which are then mapped to form a 3-D image of the object.

公开(公告)号：US09677997B2

公开(公告)日：2017-06-13

申请号：US15095724

申请日：2016-04-11

Applicant: DEKA Products Limited Partnership

Inventor： Jacob W. Scarpaci ,  Jason M. Sachs ,  Simon C. Helmore

IPC: G01J4/04 ,  G01N21/21 ,  G01N21/90 ,  A61M1/14

CPC classification number: G01N21/21 ,  A61M1/14 ,  G01J4/04 ,  G01N21/90 ,  G01N2201/0612 ,  G01N2201/0683

Abstract: Methods and apparatus for concentration determination using polarized light. The apparatus includes a first polarized light source having a first light source polarization axis and a second polarized light source having a second light source polarization axis generally perpendicular to the first light source polarization axis. Also, a first polarized light receiver having a first polarized light receiver polarization axis and configured to measure an intensity of light transmitted from the first light receiver polarizer and a second polarized light receiver having a second polarized light receiver polarization axis substantially perpendicular to the first light receiver polarization axis and configured to measure an intensity of light transmitted from the second light receiver polarizer, wherein the first and second light receiver polarization axes are generally +/−45 degrees relative to the first and second light source polarization axes.