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：US20220011090A1

公开(公告)日：2022-01-13

申请号：US17294221

申请日：2019-11-13

Applicant: NOKIA TECHNOLOGIES OY

Inventor： Xin YUAN ,  Paul WILFORD

IPC: G01B9/02 ,  G01J3/45 ,  G01J3/28 ,  G01J3/02

Abstract: Apparatus and method for detecting light, the apparatus comprising: means for splitting an input beam of light, which is obtained from an optical coherence tomography arrangement into at least a first and a second beam of light; means for modulating the first beam of light to provide a first modulated beam of light and means for modulating the second beam of light to provide a second modulated beam of light; means for dispersing the first modulated beam of light to provide a first dispersed beam of light and means for dispersing the second modulated beam of light to provide a second dispersed beam of light; means for detecting the first dispersed beam of light and means for detecting the second dispersed beam of light, the means for detecting being configured to convert the detected beams of light into electrical output signals.