公开(公告)号：US12204025B2

公开(公告)日：2025-01-21

申请号：US17878148

申请日：2022-08-01

Applicant: IMEC VZW

Inventor： Orges Furxhi ,  Azhar Din ,  Nikolaos Papadopoulos ,  Jiwon Lee ,  Mauricio Velazquez Lopez

IPC: G01S17/32 ,  G06F7/02

Abstract: A method for determining a distance to a target comprises: receiving a bitstream of binary digits corresponding to a time-varying signal based on light transmitted by a light source being reflected by the target, wherein each binary digit in the bitstream is defined based on the time-varying signal at a time instance represented by the binary digit being above or below a threshold; comparing the bitstream to a set of stored reference bitstreams, wherein the set comprises pairs comprising a first reference bitstream and a second reference bitstream representing a common distance to the target, wherein the first reference bitstream is phase-shifted in relation to the second reference bitstream; and determining the distance to the target based on selection of a pair of reference bitstreams based on said comparing.

公开(公告)号：US20240077411A1

公开(公告)日：2024-03-07

申请号：US18027679

申请日：2021-09-27

Applicant: IMEC VZW ,  IMEC USA NANOELECTRONICS DESIGN CENTER, INC. ,  Universiteit Gent

Inventor： Giorgio Signorello ,  Orges Furxhi ,  Joris Van Campenhout ,  Anton Vasiliev ,  Olivier Rousseaux

IPC: G01N21/27

CPC classification number: G01N21/274 ,  G01N2201/0636

Abstract: The present disclosure relates to an optical alignment compensation system for a gas detection system, in particular, to an integrated alignment compensation system for an open-path gas sensing system. The optical alignment compensation system of the disclosure is able to compensate for unwanted drifts of a retroreflector. The optical alignment system comprises an array of transceiver pairs, wherein each transceiver pair is configured to transmit and receive light with an optical spectrum in an absorption region of a gas to be detected. Further, it comprises a retroreflector arranged at a nominal position and configured to reflect the light. Further, it comprises an optical element arranged and configured to direct the light from at least one of the transceiver pairs along an optical path through the gas to the retroreflector, to receive the light reflected by the retroreflector along the optical path, and to direct the reflected light to the respective transceiver pair. Further, it comprises a control unit configured to select one of the transceiver pairs for transmitting and receiving the light, wherein the control unit is configured to select the transceiver pair that receives the reflected light with the highest signal response.