公开(公告)号：US11828648B2

公开(公告)日：2023-11-28

申请号：US17334132

申请日：2021-05-28

Applicant: VIAVI SOLUTIONS INC.

Inventor： Driss Touahri ,  Christopher Russell Wagner ,  Joshua Benjamin Julius Philipson

IPC: G01J3/02 ,  G01J3/447

CPC classification number: G01J3/0224 ,  G01J3/447

Abstract: A system for a high resolution optical spectrum analyzer (OSA) using various optical configurations to reduce polarization dependent loss (PDL) is disclosed. The system may include a birefringent element to receive an input optical beam. The birefringent element may then split the optical beam into at least two exit beams. The system may also include an optical configuration comprising at least one optical element. The optical configuration may receive the at least two exit beams from the birefringent element and transform at least one of the two exit beams using the at least one optical element to provide two parallel beams with parallel polarizations. The optical configuration may then output the two parallel beams with parallel polarizations to a downstream optical element, such as a diffraction grating, or other optical element.

公开(公告)号：US20230204422A1

公开(公告)日：2023-06-29

申请号：US17955881

申请日：2022-09-29

Applicant: Samsung Electronics Co., Ltd.

Inventor： Jinwoo Ahn ,  Juntaek Oh ,  Youngkyu Park ,  Eunsoo Hwang

IPC: G01J3/447 ,  G01N21/95 ,  G01N21/21 ,  G01J3/02

CPC classification number: G01J3/447 ,  G01N21/9501 ,  G01N21/211 ,  G01J3/021 ,  G01J3/0208 ,  G01N2021/213

Abstract: An imaging assembly of a spectral imaging ellipsometer includes an analyzer configured to polarize reflected light reflected from a sample surface, an imaging mirror optical system disposed on an optical path of the reflected light passing through the analyzer and including a first mirror having a concave surface and a second mirror having a convex surface, and a light detector configured to receive light passing through the imaging mirror optical system to collect spectral data. The reflected light is firstly reflected by the first mirror, the firstly reflected light is secondarily reflected by the second mirror and travels toward the first mirror again, and then thirdly reflected by the first mirror to be imaged on a light receiving surface of the light detector.

公开(公告)号：US20190250038A1

公开(公告)日：2019-08-15

申请号：US16279181

申请日：2019-02-19

Applicant: Massachusetts Institute of Technology

Inventor： Thomas H. Jeys ,  William D. Herzog ,  Brian G. Saar ,  Alexander M. Stolyarov ,  Ryan Sullenberger ,  David Crompton ,  Shawn Michael Redmond

IPC: G01J3/433 ,  G01J3/447 ,  G01J3/28 ,  G01N21/17 ,  G01J3/10 ,  G01N21/63

CPC classification number: G01J3/433 ,  G01J3/108 ,  G01J3/2823 ,  G01J3/447 ,  G01N21/1717 ,  G01N21/636 ,  G01N2021/1725

Abstract: A device, and corresponding method, can include a pump light source configured to irradiate a target specimen. The device can also include a sensor configured to observe a probe speckle pattern based on light from a probe light source reflected from the target specimen. The device further may include a correlator configured to determine a material property of the target specimen by analyzing changes in images of the probe speckle pattern as a function of the irradiation with the pump light source. Advantages of the device and method can include much higher sensitivity than existing methods; the ability to use visible probe wavelengths for uncooled, low-cost visible detectors with high spatial resolution; and the ability to obtain target material properties without detecting infrared light.

公开(公告)号：US20190162999A1

公开(公告)日：2019-05-30

申请号：US15827204

申请日：2017-11-30

Applicant: Palo Alto Research Center Incorporated

Inventor： Alex Hegyi

IPC: G02F1/139 ,  G02F1/1335 ,  G02F1/13 ,  G02B27/28 ,  G02B5/30 ,  G01J4/04

CPC classification number: G02F1/1395 ,  G01J3/28 ,  G01J3/2823 ,  G01J3/447 ,  G01J3/45 ,  G01J3/4531 ,  G01J4/04 ,  G01J2003/2866 ,  G02B5/3083 ,  G02B27/286 ,  G02F1/1326 ,  G02F1/13306 ,  G02F1/13318 ,  G02F1/133528 ,  G02F2201/58 ,  G02F2203/62

Abstract: A liquid-crystal variable retarder has first and second liquid-crystal cells with respective first and second thicknesses, the second thickness being less than the first thickness. A feedback sensor provides a feedback signal indicative of a retardance of the liquid-crystal variable retarder. A controller is coupled to the feedback sensor and the first and second liquid-crystal cells. The controller is operable to apply a first signal to the first liquid-crystal cell based on a target retardance trajectory and a feedforward control model. The controller applies a second signal to the second liquid-crystal cell based on the feedback signal and the target retardance trajectory.

公开(公告)号：US20180321083A1

公开(公告)日：2018-11-08

申请号：US15755765

申请日：2016-08-15

Applicant: Robert Bosch GmbH

Inventor： Ingo Herrmann ,  Martin Husnik ,  Eugen Baumgart ,  Christian Huber ,  Benedikt Stein

IPC: G01J3/02 ,  G01J3/28 ,  G01J3/447 ,  G01J3/45

CPC classification number: G01J3/0224 ,  G01J3/0205 ,  G01J3/0208 ,  G01J3/0256 ,  G01J3/2803 ,  G01J3/2823 ,  G01J3/447 ,  G01J3/45 ,  G01J3/4531

Abstract: A miniature spectrometer includes an optical system, a polarization interferometer with a polarizer and a Savart element and an analyzer, a detection unit with a detector, and a data unit. The optical system of the miniature spectrometer is configured as a diffuser.

公开(公告)号：US20180239944A1

公开(公告)日：2018-08-23

申请号：US15759880

申请日：2016-09-09

Applicant: NEC Corporation

Inventor： Yuji OHNO ,  Masahiro KUBO ,  Katsumi ABE ,  Kimiyasu TAKOH ,  Ersin ALTINTAS ,  Takeshi AKAGAWA ,  Tetsuri ARIYAMA ,  Ichiro ISHIMARU

IPC: G06K9/00 ,  A61B5/1172 ,  A61B5/00 ,  G01J3/447 ,  G01J3/28

CPC classification number: G06K9/0012 ,  A61B5/0075 ,  A61B5/1172 ,  A61B5/489 ,  G01J3/2823 ,  G01J3/447 ,  G06K9/00033 ,  G06K9/00087 ,  G06K9/2018

Abstract: A living body is accurately determined while minimizing increases in the size of a device and increases in the number of components. A living body determination device includes a spectroscopic device 104 that disperses light entering from a pedestal side and outputs the result; a light emission device 101 that emits first light toward the pedestal from a position facing the spectroscopic device 104 with the pedestal therebetween; a light emission device 102 that emits second light toward the pedestal from the spectroscopic device 104 side; an image acquisition device 105 that outputs image information indicating a brightness corresponding to the intensity of the light output by the spectroscopic device 104; and a calculation device 106 that acquires first image information regarding each of the spectra of the first light from the image acquisition device 105, acquires first spectroscopic information on the basis of each of the pieces of first image information, acquires second image information regarding each of the spectra of the second light from the image acquisition device 105, acquires second spectroscopic information on the basis of each of the pieces of second image information, and determines whether or not a measurement target 10a is a living body, based on the first and second spectroscopic information.

公开(公告)号：US20170131146A1

公开(公告)日：2017-05-11

申请号：US15293219

申请日：2016-10-13

Applicant: Fuji Electric Co., Ltd.

Inventor： Masanori OTO

IPC: G01J3/453 ,  G01J3/02 ,  G01J3/447

CPC classification number: G01J3/453 ,  G01J3/0208 ,  G01J3/0224 ,  G01J3/447 ,  G01J3/4531

Abstract: A spectrometer includes a beam splitter that receives incident light rays and splits each of the incident light rays into first and second spatially displaced, linearly polarized light rays that respectively have first and second polarization directions orthogonal to each other; an optical member that receives the split incident light rays from the beam splitter and optically converts the split incident light rays into a plurality of light beams that are respectively guided to mutually differing locations so as to generate interference fringes in the respective locations, each of the plurality of light beams including a component of the first linearly polarized light rays and a component of the second linearly polarized light rays; and a detector that detects the interference fringes respectively generated by the plurality of light beams.

公开(公告)号：US09628682B2

公开(公告)日：2017-04-18

申请号：US13548801

申请日：2012-07-13

Applicant: David B. Pollock ,  Patrick J. Reardon

Inventor： David B. Pollock ,  Patrick J. Reardon

IPC: H04N5/225 ,  G01J3/28 ,  G01J3/433 ,  G01J3/447 ,  G01J3/02 ,  G02B26/08 ,  G02B27/00 ,  H04N5/232 ,  H04N5/349

CPC classification number: H04N5/2254 ,  G01J3/0208 ,  G01J3/0262 ,  G01J3/2803 ,  G01J3/2823 ,  G01J3/433 ,  G01J3/447 ,  G02B26/0891 ,  G02B27/0018 ,  H04N5/23229 ,  H04N5/349

Abstract: A camera concurrently produces an orthographic map and map spectral content. Illumination from an image passes through a phase modulator and the resulting rotating photo-flux phase is converted to an electrical signal by multiple adjacent sensors of detectors of array of detectors. The amount of unwanted illumination reaching the sensors is reduced by a set of baffles that shield and protect the transducers from unwanted out-of-field light and other light sources.

公开(公告)号：US09612089B2

公开(公告)日：2017-04-04

申请号：US14533498

申请日：2014-11-05

Applicant: ELTA SYSTEMS LTD.

Inventor： Gil Tidhar

IPC: F41G3/14 ,  G01J3/443 ,  G01J3/447 ,  G01J3/36 ,  G01J3/02 ,  G01S3/784 ,  H04N5/33

CPC classification number: F41G3/147 ,  G01J3/0224 ,  G01J3/36 ,  G01J3/443 ,  G01J3/447 ,  G01S3/784 ,  H04N5/332

Abstract: A multiband imaging system comprising: an optical module configured for acquiring simultaneously images from a common field-of-view (FOV) scene in a short wavelength spectral band and in a long wavelength spectral band, the optical module comprising a polarizer configured for applying polarization filtering to electromagnetic radiation of the long wavelength spectral band; and a processing module configured to analyze data indicative of received irradiance distribution between the short and long wavelength spectral bands.

公开(公告)号：US20170038258A1

公开(公告)日：2017-02-09

申请号：US14944446

申请日：2015-11-18

Applicant: Palo Alto Research Center Incorporated

Inventor： Alex Hegyi ,  Joerg Martini ,  Peter Kiesel ,  David K. Biegelsen

IPC: G01J3/447 ,  G01J3/28 ,  G02B5/04 ,  G01J3/45 ,  G02B27/28 ,  G02B5/30

CPC classification number: G01J3/447 ,  G01J3/0224 ,  G01J3/0229 ,  G01J3/0289 ,  G01J3/2823 ,  G01J3/45 ,  G01J3/4531 ,  G02B5/04 ,  G02B5/3083 ,  G02B27/283 ,  G02B27/286

Abstract: An optical device includes a waveplate sandwiched between first and second polarizers and is arranged to receive light emanating from an object or object image that is in motion relative to the optical device. A detector array includes one or more detector elements and is optically coupled to receive light from the second polarizer. Each detector element of the detector array provides an electrical output signal that varies according to intensity of the light received from the second polarizer. The intensity of the light is a function of relative motion of the object or the object image and the optical device and contains spectral information about an object point of the object.

Abstract translation: 光学装置包括夹在第一和第二偏振器之间的波片，并且布置成接收从相对于光学装置运动的物体或物体图像发出的光。 检测器阵列包括一个或多个检测器元件，并被光耦合以接收来自第二偏振器的光。 检测器阵列的每个检测器元件提供根据从第二偏振器接收的光的强度而变化的电输出信号。 光的强度是物体或对象图像和光学装置的相对运动的函数，并且包含关于物体的物点的光谱信息。