公开(公告)号：US12276939B2

公开(公告)日：2025-04-15

申请号：US17744628

申请日：2022-05-14

Applicant: KOREA PHOTONICS TECHNOLOGY INSTITUTE

Inventor： Seon Kyu Yoon ,  Jin Su Lee

IPC: G03H1/04 ,  G01J1/42 ,  G01J9/02 ,  H04N23/55 ,  H04N23/56 ,  H10F39/12

Abstract: According to an embodiment, a holographic image sensor comprises a lens focusing object light incident from outside of the holographic image sensor to the holographic image sensor, a filter transmitting a predetermined wavelength band of light of the focused object light, a light receiving unit receiving interference light to sense a holographic image, and a reference light source directly emitting reference light having the predetermined wavelength band to the light receiving unit.

公开(公告)号：US12241791B2

公开(公告)日：2025-03-04

申请号：US17147014

申请日：2021-01-12

Applicant: Kenneth R. MacDonald

Inventor： Kenneth R. MacDonald

IPC: G01J9/02 ,  H01S3/10 ,  H01S3/13 ,  H01S3/23

Abstract: A combined beam having a desired wavefront is produced from a first electromagnetic beam propagating in a beam direction and a second electromagnetic beam propagating in the beam direction and interfering with the first electromagnetic beam in an interference region. A first power measurement indicates a first combined power of the first electromagnetic beam and the second electromagnetic beam at a first sample point in the interference region. A second power measurement indicates a second combined power of the first electromagnetic beam and the second electromagnetic beam at a second sample point in the interference region. A phase difference between the first electromagnetic beam and the second electromagnetic beam is determined using the first power measurement and the second power measurement. The phase of the first beam can be changed based on the phase difference to produce the combined beam that has the desired wavefront.

公开(公告)号：US20250035490A1

公开(公告)日：2025-01-30

申请号：US18627358

申请日：2024-04-04

Applicant: NATIONAL TIME SERVICE CENTER, THE CHINESE ACADEMY OF SCIENCES

Inventor： Ruifang DONG ,  Zhiguang XIA ,  Xiao XIANG ,  Run’ai QUAN ,  Tao LIU ,  Shougang ZHANG

IPC: G01J9/02

Abstract: The present disclosure provides a dispersion measurement device and method based on a Franson second-order quantum interference technology. The device includes: an energy-time entangled twin-photon source configured to generate a plurality of optical signals, where the optical signals each include a signal photon and an idle photon; a polarization splitter configured to split the signal photon and the idle photon, and enable the signal photon to pass through a to-be-measured dispersive medium, such that a correlation time processing module records, under a width of a coincidence measurement integration window, first time of the idle photon arriving at a first single-photon detector, and second time of the signal photon arriving at a second single-photon detector, and obtains a twin-photon conference time width based on the first time and the second time; and a processing module.

公开(公告)号：US12209890B2

公开(公告)日：2025-01-28

申请号：US17710682

申请日：2022-03-31

Applicant: Apple Inc.

Inventor： Tong Chen ,  Ahmet Fatih Cihan ,  Daryl I. Vulis ,  Mingzhou Jin

IPC: G01N15/1434 ,  G01D5/26 ,  G01J9/02 ,  G06F3/01 ,  G06F3/03 ,  G06F3/0354

Abstract: An optical sensor module includes an interferometric sensor and a set of one or more optical elements. The interferometric sensor includes a coherent light source and at least one detector configured to generate an interferometric signal. The set of one or more optical elements is configured to simultaneously direct a first portion of light emitted by the coherent light source toward a first focus area within a first depth of focus; direct a second portion of the light emitted by the coherent light source toward a second focus area within a second depth of focus; and direct portions of the emitted light that are returned from one or more objects within the first depth of focus or the second depth of focus toward the interferometric sensor.

公开(公告)号：US20250012636A1

公开(公告)日：2025-01-09

申请号：US18710022

申请日：2022-11-15

Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.

Inventor： Andreas ZEPP ,  Szymon GLADYSZ

IPC: G01J9/02 ,  G01J9/00

Abstract: Disclosed is a method for determining a wavefront gradient, the method involving irradiating a transmission filter unit with a light and measuring the intensity of light transmitted, followed by another irradiating and measuring of the light transmitted, and calculating a spatial contrast K from a difference of the first intensity and the second intensity and also calculating a local wavefront gradient from the K value and a calibration factor c.

公开(公告)号：US20240385243A1

公开(公告)日：2024-11-21

申请号：US18662517

申请日：2024-05-13

Applicant: IMEC VZW ,  Universiteit Gent

Inventor： Wim BOGAERTS ,  Liu YICHEN ,  Yancan WU

IPC: G01R31/317 ,  G01J9/02

Abstract: According to an aspect there is provided an optical monitoring device comprising: a first input for receiving a portion of a first optical signal coupled from a first waveguide into the first input; a second input for receiving at least a portion of a second optical signal coupled into the second input; a mixing unit for controlling combining of the portion of the first optical signal with the at least a portion of the second optical signal into a combined signal at an output from the mixing unit; and at least one photodetector for detecting the combined signal. The optical monitoring device is configured to apply a modulation signal to modulate at least one of a phase of the portion of the first and/or second optical signal, a coupling of the portion of the first and/or second optical signal into the respective input, or an amplitude of the portion of the first and/or second optical signal being transferred into the combined signal.

公开(公告)号：US20240319619A1

公开(公告)日：2024-09-26

申请号：US17767420

申请日：2020-10-23

Applicant: TSINGHUA UNIVERSITY ,  BEIJING U-PRECISION TECH CO., LTD.

Inventor： Yu ZHU ,  Leijie WANG ,  Ming ZHANG ,  Jitao XU ,  Rong CHENG ,  Jiankun HAO ,  Xin LI ,  Kaiming YANG ,  Yujiao FAN ,  Siqi GAO

IPC: G03F7/00 ,  G01J9/02 ,  G02B5/18 ,  G02B27/28

CPC classification number: G03F7/7085 ,  G01J9/02 ,  G02B27/285 ,  G02B27/286 ,  G03F7/70408 ,  G03F7/70825 ,  G03F7/70975 ,  G02B5/1857

Abstract: Disclosed is a phase measurement device, comprising: a first wave plate, a first polarization splitting prism, a fourth wave plate, a retroreflector, a third wave plate, a reflector, a second wave plate, a polarizer, a second polarization splitting prism, a third polarization splitting prism, a first photoelectric detector, a second photoelectric detector, and a base, wherein the first to third polarization splitting prisms and the first and second photoelectric detectors are fixed on the base; the first to fourth wave plates are respectively arranged around the periphery of the first polarization splitting prism; the polarizer is arranged on an emitting surface of the third polarization splitting prism; the retroreflector is arranged on an outer side of the fourth wave plate; and the reflector is arranged on an outer side of the third wave plate. An interferometric signal is resolved to obtain a measurement light beam phase.

公开(公告)号：US12025502B2

公开(公告)日：2024-07-02

申请号：US17729082

申请日：2022-04-26

Applicant: MGEN.CO,.LTD

Inventor： Min Young Park

IPC: G01J9/02 ,  G01J9/00 ,  G02B7/182 ,  G02B27/28

CPC classification number: G01J9/02 ,  G02B7/182 ,  G02B27/283 ,  G01J2009/006 ,  G01J2009/0261

Abstract: A spectropolarimetric apparatus according to an embodiment of the present invention includes a light source attachment/detachment unit to which a light source is detachably coupled, a polarization interferometer configured to split light emitted from the light source coupled to the light source attachment/detachment unit into a plurality of polarized light beams using a polarization beam splitter and irradiate at least some of the split polarized light beams to a reflective sample to output the reflected light, and a spectrometer configured to measure physical properties of the reflective sample by analyzing the output light, wherein a wavelength of the light source coupled to the light source attachment/detachment unit varies depending on the reflective sample.

公开(公告)号：US11933609B2

公开(公告)日：2024-03-19

申请号：US17644933

申请日：2021-12-17

Applicant: YOKOGAWA ELECTRIC CORPORATION ,  Yokogawa Test & Measurement Corporation

Inventor： Nobuhide Yamada

IPC: G01B9/02001 ,  G01B9/02 ,  G01J9/02

CPC classification number: G01B9/02011 ,  G01J9/0246 ,  G01B9/02051 ,  G01B2290/20 ,  G01B2290/45 ,  G01B2290/70 ,  G01J2009/0265

Abstract: The interferometer 10 according to this disclosure includes: a first optical component 12 that splits each of the P polarization component and the S polarization component of the light to be measured into the first optical path R1 and the second optical path R2 and combines the light to be measured; a second optical component 13 placed in the first optical path; a third optical component 14 that splits the light to be measured into the P polarization component and the S polarization component; and a P polarization detector 11a and an S polarization detector 11b that respectively detect the P polarization component and the S polarization component split by the third optical component, wherein the second optical component has an optical surface that changes the propagation direction of the light to be measured and gives a phase difference between the P polarization component and the S polarization component.

公开(公告)号：US11927863B2

公开(公告)日：2024-03-12

申请号：US18081554

申请日：2022-12-14

Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES

Inventor： Benoît Racine ,  Arnaud Verdant ,  Pierre Joly

IPC: G02F1/137 ,  G01J9/02 ,  G02F1/1337 ,  G02F1/1343 ,  G02F1/1368

CPC classification number: G02F1/137 ,  G01J9/02 ,  G02F1/133738 ,  G02F1/134336 ,  G02F1/13439 ,  G02F1/1368 ,  G02F2203/02 ,  G02F2203/50

Abstract: A device for modulating the phase of a light beam includes a matrix of elementary cells, called pixels, coupled to a circuit for addressing the pixels, the device further comprising a set of so-called lateral electrodes extending in a so-called vertical direction (Y) at right angles to the alignment direction (Xa) and configured to apply, for each pixel and via at least two lateral electrodes, a so-called acceleration voltage generating a lateral electrical field (Era) substantially parallel to the alignment direction, in a vector allowing an accelerated return of the liquid crystal molecules to their orientation of rest, the acceleration voltage being configured to be applied in a phase called acceleration relaxation phase, when the activation voltage is no longer applied.