公开(公告)号：US20220196385A1

公开(公告)日：2022-06-23

申请号：US17605946

申请日：2020-04-16

Applicant: NOKIA TECHNOLOGIES OY

Inventor： Xin YUAN ,  Paul WILFORD ,  Mu QIAO ,  Xuan LIU

IPC: G01B9/02091 ,  G01B9/02015 ,  G01J3/02

Abstract: An apparatus comprising: a double path interferometer comprising a sample path for an object and a reference path; a source of linearly polarized light for the double path interferometer, a phase plate positioned in the sample path; means for superposing the sample path and reference path to create a beam of light for detection; means for spatially modulating the beam of light to produce a modulated beam of light; means for dispersing the modulated beam of light to produce a spatially modulated and dispersed beam of light; a first detector, a second detector, and means for splitting the spatially modulated and dispersed beam of light, wherein light of a first linear polarization is directed to the first detector and light of a second linear polarization, orthogonal to the first linear polarization, is directed to the second detector.

公开(公告)号：US20210404790A1

公开(公告)日：2021-12-30

申请号：US17356781

申请日：2021-06-24

Applicant: NOKIA TECHNOLOGIES OY

Inventor： Xin YUAN ,  Xuan LIU ,  Mu QIAO

IPC: G01B9/02 ,  G01B11/24

Abstract: An apparatus is provided that includes a detector configured to detect, separately during separate exposure periods of multiple exposure periods, spatially modulated light. The apparatus also includes a spatial modulator configured to apply a different spatial modulation to received light separately during separate exposure periods of the multiple exposure periods, to produce spatially modulated light. The apparatus further includes one or more optical elements configured to condense the spatially modulated light for detection by the detector. A system that includes the apparatus and a corresponding method and a computer-readable storage medium are also provided.

公开(公告)号：US20210389117A1

公开(公告)日：2021-12-16

申请号：US17345098

申请日：2021-06-11

Applicant: NOKIA TECHNOLOGIES OY

Inventor： Xin YUAN ,  Xuan LIU ,  Mu QIAO

IPC: G01B9/02 ,  A61B3/10 ,  A61B5/00

Abstract: An apparatus is provided that includes a detector configured to detect, cumulatively during an exposure period, spatially modulated light. The apparatus also includes modulation means for applying multiple different effective spatial modulations to received light, during the exposure period. A different effective spatial modulation is applied to received light in dependence upon a time during the exposure period of the detector and a frequency of the light, to produce spatially modulated light for detection by the detector.