公开(公告)号：US10970802B2

公开(公告)日：2021-04-06

申请号：US16052019

申请日：2018-08-01

Applicant: FUJITSU FRONTECH LIMITED

Inventor： Kozo Yamazaki ,  Isao Iwaguchi

IPC: G06T1/00 ,  G06F21/32 ,  H04N5/235 ,  H04N5/232 ,  G02B5/20 ,  H04N5/225 ,  G02B5/30 ,  G01J4/04 ,  H04N5/238 ,  H04N5/369 ,  H04N9/04

Abstract: An imaging device includes: an image sensor that images an object to be imaged through polarizing plates arranged to have a different polarization direction for each pixel in a pixel group that includes a plurality of pixels corresponding to each of points of the object to be imaged; a pixel selecting unit that selects a pixel having a lowest brightness for each of the pixel group corresponding to each of the points; and an image output unit that outputs a captured image of the object to be imaged that is generated from pixels selected by the pixel selecting unit.

公开(公告)号：US10904503B2

公开(公告)日：2021-01-26

申请号：US16670239

申请日：2019-10-31

Applicant: SONY CORPORATION

Inventor： Yuhi Kondo ,  Shun Kaizu ,  Teppei Kurita ,  Tuo Zhuang ,  Yasutaka Hirasawa ,  Ying Lu

IPC: H04N9/64 ,  H04N5/232 ,  G01J3/50 ,  G01J4/04 ,  H04N9/73 ,  H04N17/00 ,  H04N9/04

Abstract: A correction information generation section 50 emits measurement light having uniform intensity onto a polarized image acquisition section 20 acquiring a polarized image. Further, on the basis of a measured polarized image acquired from the polarized image acquisition section 20, the correction information generation section 50 generates variation correction information for correcting sensitivity variations caused in the measured polarized image due to difference in polarization direction, and causes a correction information storage section 30 to store the generated variation correction information. A correction processing section 40 then corrects the sensitivity variations caused in the polarized image acquired by the polarized image acquisition section 20 due to the difference in polarization direction by using the pre-generated variation correction information stored in the correction information storage section 30. Therefore, the polarized image outputted from the correction processing section 40 becomes a high-quality polarized image with, for example, its sensitivity variations corrected.

公开(公告)号：US10652497B2

公开(公告)日：2020-05-12

申请号：US15960547

申请日：2018-04-23

Applicant: TRUSTEES OF DARTMOUTH COLLEGE

Inventor： Eric R. Fossum ,  Leo Anzagira

IPC: H01L27/146 ,  H04N5/378 ,  G02B27/28 ,  G02B5/20 ,  G02B5/30 ,  H04N9/04 ,  G01J4/04

Abstract: Some embodiments provide an image sensor that includes (i) quanta image sensor having an array of jots and configured for spatial and temporal oversampling, and (ii) a polarization filter array monolithically integrated with the quanta image sensor, so as to provide for a polarization image sensor. The image sensor may also include a color filter array.

公开(公告)号：US10598965B2

公开(公告)日：2020-03-24

申请号：US15011189

申请日：2016-01-29

Applicant: VIAVI SOLUTIONS INC.

Inventor： Joshua Philipson ,  Chris Wagner ,  Grant Tessaro ,  Robert Matthew Adams

IPC: G02F1/01 ,  G02B6/27 ,  G01B11/27 ,  G01J4/04

Abstract: According to an example, a polarization control system is to manipulate polarization manipulators to output light that achieves a trajectory on a Poincaré sphere that tracks a known trajectory of a polarizer on the Poincaré sphere, in which the trajectory of the output light enables definition of a reference polarization state of the output light. The polarization control system may also manipulate an output polarization manipulator to set the output light to a predefined polarization state based upon the reference polarization state.

公开(公告)号：US10571309B2

公开(公告)日：2020-02-25

申请号：US15553224

申请日：2016-02-22

Applicant: Guenter Grau

Inventor： Guenter Grau

IPC: G01D5/34 ,  G01J4/04

Abstract: Various embodiments relate to devices for measuring the state of devices and multi-stage rotary encoders as well as to associated sensors. In order to simplify the design of devices which can be read out electronically and multi-turn rotary encoders, according to some embodiments a device having at least one rotatable wheel, at least one light source and at least one polarization sensor is proposed, the wheel being at least partially transparent and polarization-maintaining, parts of the wheel being configured as pole filters, it being possible for light which exits the light source to be polarized by the pole filter and to be received by the polarization sensor.

公开(公告)号：US10564504B2

公开(公告)日：2020-02-18

申请号：US15827204

申请日：2017-11-30

Applicant: Palo Alto Research Center Incorporated

Inventor： Alex Hegyi

IPC: G02F1/13 ,  G02F1/139 ,  G02F1/1335 ,  G01J4/04 ,  G02B5/30 ,  G01J3/447 ,  G01J3/28 ,  G01J3/45 ,  G01J3/453 ,  G02F1/133 ,  G02B27/28

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：US20200033194A1

公开(公告)日：2020-01-30

申请号：US16438710

申请日：2019-06-12

Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

Inventor： Jen-Hao YEH ,  Chun-Lin CHANG ,  Han-Lung CHANG ,  Li-Jui CHEN ,  Po-Chung CHENG

IPC: G01J4/04 ,  G02B5/30 ,  G03F7/20 ,  G02B27/28

Abstract: A light source system is provided. The light source system is capable of measuring a polarization angle and includes a light source configured to emit an original light beam, and the original light beam has an original polarization angle. The light source system further includes an amplifying module configured to amplify the original light beam and generate a forward beam for hitting a target, and the forward beam has a forward polarization angle that is equal to the original polarization angle. The light source system further includes a polarization measurement unit, and the polarization measurement unit includes a first polarization measurement module configured to receive a first return beam and measure a first polarization angle of the first return beam. The first return beam is reflected from the target.

公开(公告)号：US20200025990A1

公开(公告)日：2020-01-23

申请号：US16299066

申请日：2019-03-11

Applicant: The Arizona Board of Regents on Behalf of the University of Arizona

Inventor： Stanley Pau ,  Wei-Liang Hsu

IPC: G02B5/30 ,  G01J4/04 ,  C09K19/38 ,  C09K19/56 ,  G02F1/1337

Abstract: Exemplary thin-film optical devices have first and second layer groups disposed as a layer stack on a substrate. The first layer group comprises a first PPN layer, a first LCP layer, and a first barrier layer all superposed. The second layer group is superposed relative to the first layer group, and includes a second PPN layer, a second LCP layer, and a second barrier layer all superposed. The first and second layer groups cooperate to polarize multiple wavelengths of an incident light flux in a broadband and/or wide-angle manner Each of the layer groups has an alignment layer, a respective liquid-crystal polymer layer, and a barrier layer.

公开(公告)号：US20200025678A1

公开(公告)日：2020-01-23

申请号：US16483877

申请日：2018-02-08

Applicant: YISSUM RESEARCH DEVELOPMENT COMPANY OF THE HEBREW UNIVERSITY OF JERUSALEM LTD.

Inventor： Ronen RAPAPORT ,  Ralfy KENAZ

IPC: G01N21/21 ,  G01J4/04 ,  G01B11/06 ,  G01N21/27

Abstract: System and method for use in optical monitoring of a sample. The system comprising: a light source unit (140) for providing collimated illumination; polarization modulation unit (160) located in optical path of light propagating from the light source unit; a lens unit (120) for focusing light onto an illumination spot on a surface of a sample, and for collection of light components returning from the sample; a light collection unit configured for collecting light returning from the sample and generate output image data associated with Fourier plane imaging with respect to surface of the sample; and a control unit (500) configured processing said data in accordance with said system calibration. The method provides calibration data, and comprising: providing reference data indicative of complex refractive index of the reference samples on at least two reference samples; collecting ellipsometry data for said at least two reference samples using the ellipsometry system, generating output data having a plurality of data pieces, each associated with unknown angular direction; and for each data piece corresponding to an unknown angular direction, determining simultaneously system parameters and angle of incidence in accordance with corresponding parameters of the reference data to thereby determine calibration data.

公开(公告)号：US10395113B2

公开(公告)日：2019-08-27

申请号：US15450948

申请日：2017-03-06

Applicant: Polaris Sensor Technologies, Inc.

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

IPC: G06K9/00 ,  G06K9/62 ,  G06K9/20 ,  H04N9/64 ,  G06K9/46 ,  G01V8/10 ,  G01J4/04 ,  G02B5/20 ,  G02B27/28

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.