公开(公告)号：US20250067554A1

公开(公告)日：2025-02-27

申请号：US18720021

申请日：2022-12-07

Applicant: Dyson Technology Limited

Inventor： David James GRAHAM ,  Michele BENETTI ,  Sanjeeb TRIPATHY ,  Christopher John BATEMAN ,  Alexander Michael KEMBER

IPC: G01B9/02 ,  G01N15/00 ,  G01N15/0205 ,  G01N15/075

Abstract: A self-mixing interferometer configured to monitor particulate material within a monitored region of space comprising a laser cavity assembly (1A) and an optical assembly (1B) configured to bathe the monitored region with laser light of the interferometer. A laser monitoring unit (1C) is configured to acquire an interferometric signal generated by the interferometer in response to light returned to the laser cavity assembly from said wavefronts by said particulate material. A processing module (1D) is configured to determine a property of the particulate material within the monitored region according to a wavelet transformation of the interferometric signal at least a part of which comprises a waveform of changing frequency.

公开(公告)号：US20250060297A1

公开(公告)日：2025-02-20

申请号：US18720037

申请日：2022-12-07

Applicant: Dyson Technology Limited

Inventor： David James GRAHAM ,  Michele BENETTI ,  Sanjeeb TRIPATHY ,  Christopher John BATEMAN ,  Alexander Michael KEMBER

IPC: G01N15/0205

Abstract: A self-mixing interferometer configured to monitor particulate material within a monitored region of space comprising a laser cavity assembly (1A) and an optical assembly (1B) configured to bathe the monitored region with laser light of the interferometer possessing wavefronts having different directions at different respective locations within the monitored region. A laser monitoring unit (1C) is configured to acquire an interferometric signal generated by the interferometer in response to light returned to the laser cavity assembly from said wavefronts by said particulate material. A processing module (1D) is configured to determine a property of the particulate material within the monitored region according to changes in the frequency of a waveform within at least a part of the interferometric signal.

公开(公告)号：US20250052663A1

公开(公告)日：2025-02-13

申请号：US18720049

申请日：2022-12-07

Applicant: Dyson Technology Limited

Inventor： David James GRAHAM ,  Michele BENETTI ,  Sanjeeb TRIPATHY ,  Christopher John BATEMAN ,  Alexander Michael KEMBER

IPC: G01N15/1429 ,  G01N15/1434

Abstract: A self-mixing interferometer configured to monitor particulate material within a monitored region of space comprising a laser cavity assembly (1A) and an optical assembly (1B) configured to bathe the monitored region with laser light of the interferometer. A laser monitoring unit (1C) is configured to acquire an interferometric signal generated by the interferometer in response to light returned to the laser cavity assembly from said wavefronts by said particulate material. A processing module (1D) is configured to determine a property of the particulate material within the monitored region according to a structure in data describing the interferometric signal in a frequency-space transformation thereof wherein at least a part of the interferometric signal comprises a waveform of changing frequency.