公开(公告)号：US20240210245A1

公开(公告)日：2024-06-27

申请号：US18544947

申请日：2023-12-19

Applicant: IMEC VZW ,  Katholieke Universiteit Leuven

Inventor： Farhan ALI ,  Bruno FIGEYS ,  Robert GEHLHAAR ,  Jan GENOE

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

CPC classification number: G01J4/02 ,  G02B5/3083 ,  G02B27/283

Abstract: According to an aspect of the present inventive concept there is provided a device for polarization dependent imaging, comprising:



a detector comprising light sensitive elements;
a plurality of light propagating units, each comprising a polarization splitter having a receiving end for receiving incident light, and comprising a first and a second waveguide.




The first and second waveguides comprise a first and second portion of the receiving end. The first and second waveguides comprise a first and second distributing end, separate from each other. The polarization splitter is configured to propagate received light to the distributing ends. Each of the portions has an elongated shape such that propagation of light in the waveguides is dependent on the light's linear polarization. The elongated shapes are angled with respect to each other, such that the waveguides are configured to propagate different linear polarization directions.
Each light propagating unit is arranged such that light at the first and second distributing ends is output towards a first and second light sensitive element, respectively.

公开(公告)号：US11921033B2

公开(公告)日：2024-03-05

申请号：US17311377

申请日：2019-12-09

Applicant: Oxford University Innovation Limited

Inventor： Martin Booth ,  Chao He

IPC: G01N21/21 ,  G01J4/02 ,  G01N21/47

CPC classification number: G01N21/21 ,  G01J4/02 ,  G01N21/474 ,  G01N2021/4745

Abstract: A single-shot Mueller matrix polarimeter (1700), MMP, comprising: a polarization state generator (1706), PSG, arranged to receive a source optical field (1704) and provide a probe field (1708) having a plurality of spatial portions, each portion having a different polarization state; a polarization state analyser (1718), PSA, arranged to receive a modified probe field (1716) resulting from interaction of the probe field generated by the PSG with a sample under investigation, and further arranged to apply, to each of a corresponding plurality of spatial portions of the modified probe field, a plurality of retardances and a plurality of fast axis orientations; and a detector (1720) arranged to detect an output (1722) of the PSA.

公开(公告)号：US11340116B2

公开(公告)日：2022-05-24

申请号：US16759849

申请日：2020-04-03

Applicant: SHENZHEN LUBANG TECHNOLOGY CO., LTD.

Inventor： Yang Yang ,  Xinyang Liu ,  Xiaochun Li ,  Huihui Huang

IPC: G01J4/02 ,  G02F1/1335 ,  G01J4/00

Abstract: Disclosed are an optical gradation system and method. The optical gradation system comprises: a first device configured to emit broad-spectrum linearly polarized light in a first polarization direction; a second device provided with at least one first region for splitting lights of different wavelengths mixed in the broad-spectrum linearly polarized light incident by the first device into emergent lights in different polarization directions without changing a beam propagation path; a third device configured to filter out linearly polarized light in a second polarization direction from the emergent lights from the second device in different polarization directions; and, a rotator configured to drive at least one of the first device, the second device and the third device to rotate, wherein the first device, the second device and the third device are arranged coaxially.

公开(公告)号：US11079280B2

公开(公告)日：2021-08-03

申请号：US15971455

申请日：2018-05-04

Applicant: CORNING INCORPORATED

Inventor： Rostislav Vatchev Roussev ,  Vitor Marino Schneider

IPC: G01J4/02 ,  G02B5/04 ,  G02B5/06 ,  G01N21/23 ,  G02B6/34 ,  G01J4/00 ,  G01N21/43 ,  G01N21/41

Abstract: Apparatus and methods for measuring mode spectra for ion-exchanged glass substrates having a steep index region are disclosed. An interfacing fluid is provided between the coupling prism and the glass substrate. The interfacing fluid thickness is selected so that the variation in modal birefringence with fluid thickness is reduced to an acceptable level. The coupling prism can include a prism coating on the coupling surface so that the substrate-prism interface includes the prism coating. The coupling prism can also include stand-off members that serve to define the thickness of the interfacing fluid.

公开(公告)号：US20210215540A1

公开(公告)日：2021-07-15

申请号：US16759849

申请日：2020-04-03

Applicant: SHENZHEN LUBANG TECHNOLOGY CO., LTD.

Inventor： Yang YANG ,  Xinyang LIU ,  Xiaochun LI ,  Huihui HUANG

IPC: G01J4/02 ,  G02F1/1335

Abstract: Disclosed are an optical gradation system and method. The optical gradation system comprises: a first device configured to emit broad-spectrum linearly polarized light in a first polarization direction; a second device provided with at least one first region for splitting lights of different wavelengths mixed in the broad-spectrum linearly polarized light incident by the first device into emergent lights in different polarization directions without changing a beam propagation path; a third device configured to filter out linearly polarized light in a second polarization direction from the emergent lights from the second device in different polarization directions; and, a rotator configured to drive at least one of the first device, the second device and the third device to rotate, wherein the first device, the second device and the third device are arranged coaxially.

公开(公告)号：US10439737B2

公开(公告)日：2019-10-08

申请号：US15895545

申请日：2018-02-13

Applicant: GOVERNMENT OF THE UNITED STATES AS REPRESENTED BY THE SECRETARY OF THE AIR FORCE

Inventor： David H. Hughes ,  Reinhard K. Erdmann

IPC: H04B10/85 ,  H04L9/06 ,  G02B27/14 ,  G01J4/02 ,  G02B27/28 ,  H04B10/70 ,  G06N10/00 ,  G09C1/00 ,  H04L9/08

Abstract: A hyper-entanglement photon server (i.e., hub) employs non-degenerate frequencies input as entangled photon pairs into a beam splitter. The beam splitter splits probability amplitudes into two sets of bunched superposition states plus two sets of anti-bunched superposition states. The amplitudes pass through identical Lyot filters and then either enter a polarization beam splitter, where the bunched and anti-bunched states switch identities, or merely advance unchanged to awaiting users at two distinct and spatially-displaced positions (i.e., spokes). The Lyot filters change the output amplitudes from rotationally invariant superpositions of generalized Bell States to rotationally non-invariant superpositions of generalized Bell states. All hubs and spokes pre-share operating key material (a security method called KCQ) that may be continually updated by shared stream ciphers seeded by fresh key material engendered by hub-to-spoke quantum communication.

公开(公告)号：US20050062966A1

公开(公告)日：2005-03-24

申请号：US10670103

申请日：2003-09-23

Applicant: Chungte Chen ,  David Ansley

Inventor： Chungte Chen ,  David Ansley

IPC: G01J4/02 ,  G01J4/00

CPC classification number: G01J4/02

Abstract: An imaging polarimeter sensor includes an achromatic beam-splitting polarizer that receives a polychromatic image beam of a scene and simultaneously produces a first polarized polychromatic image beam and a second polarized polychromatic image beam. The second polarized polychromatic image beam is of a different polarization than the first polarized polychromatic image beam and is angularly separated from the first polarized polychromatic image beam. The achromatic beam-splitting polarizer preferably includes a Wollaston prism through which the polychromatic image beam passes, and at least one grating through which the polychromatic image beam passes either before or after it passes through the Wollaston prism. An imaging detector receives the first polarized polychromatic image beam and the second polarized polychromatic image beam and produces an output image signal responsive to the first polarized polychromatic image beam and the second polarized polychromatic image beam.

Abstract translation: 成像偏振计传感器包括接收场景的多色图像束并同时产生第一偏振多色图像束和第二偏振多色图像束的消色差分束偏振器。 第二偏振多色图像束具有与第一偏振多色图像束不同的偏振，并且与第一偏振多色图像束成角度地分离。 非彩色分光偏振器优选地包括多色图像束通过的沃拉斯顿棱镜，以及至少一个光栅，多色图像光束在其穿过渥拉斯顿棱镜之前或之后通过该光栅。 成像检测器接收第一偏振多色图像束和第二偏振多色图像束，并响应于第一偏振多色图像束和第二偏振多色图像束产生输出图像信号。

公开(公告)号：US4053232A

公开(公告)日：1977-10-11

申请号：US572476

申请日：1975-04-28

Applicant: Frederick H. Dill ,  Peter S. Hauge

Inventor： Frederick H. Dill ,  Peter S. Hauge

IPC: G01B11/06 ,  G01B11/27 ,  G01B11/30 ,  G01N21/21 ,  G01J4/02 ,  G02F1/01

CPC classification number: G01B11/303 ,  G01B11/065 ,  G01B11/272 ,  G01N21/211

Abstract: Plane polarized light is reflected from a surface of a sample film to produce an elliptically polarized reflected beam. The reflected beam is passed sequentially through a rotating one-quarter wave plate and a fixed analyzer which transmits a beam whose intensity varies as a function of the rotational angle of the plate. The transmitted beam impinges upon a photodetector which produces an electric signal proportional to the intensity of the transmitted light. The rotating one-quarter wave plate cyclically varies the polarization of the beam, so that the electrical signal, when numerically Fourier analyzed, provides Fourier coefficients having both sin .DELTA. and cos .DELTA. terms, where the ellipsometric parameter .DELTA. is the instantaneous phase difference between the parallel (R.sub.p) and perpendicular (R.sub.s) components of the electric vector of the elliptically polarized reflected beam; therefore, the phase difference .DELTA. is uniquely and unambiguously defined in a single measurement. Furthermore, the presence of both sin .DELTA. and cos .DELTA. terms permits .DELTA. to be determined more accurately than is possible with the prior art rotating-analyzer ellipsometer. Since the ellipsometric parameter .psi. is also uniquely defined (tan.psi.=R.sub.p /R.sub. s), properties of the sample film can be computed. Alternatively, the rotating quarter-wave plate may be placed in the path of the incident plane polarized beam.

公开(公告)号：US1775916A

公开(公告)日：1930-09-16

申请号：US31451428

申请日：1928-10-23

Applicant: ZEISS CARL FA

Inventor： ROBERT RICHTER

IPC: G01J4/02

CPC classification number: G01J4/02

公开(公告)号：US1525145A

公开(公告)日：1925-02-03

申请号：US63852023

申请日：1923-05-12

Applicant: HILGER LTD ADAM

Inventor： ROBERT ORD PERCY

IPC: G01J4/02

CPC classification number: G01J4/02