公开(公告)号：US20250044160A1

公开(公告)日：2025-02-06

申请号：US18719039

申请日：2022-11-15

Applicant: THE SECRETARY OF STATE FOR DEFENCE

Inventor： Sean Michael Tsi-ong Tipper

IPC: G01J11/00

Abstract: The present application relates to the field of detecting pulsed radiation, in particular to methods and apparatus suitable for use in detecting short pulse lasers and extracting their pulse repetition frequencies, and especially an improved computer implemented method for detecting a pulse repetition frequency of pulsed radiation using a sensor array of sensor elements arranged in element lines.

公开(公告)号：US12022210B2

公开(公告)日：2024-06-25

申请号：US17907588

申请日：2021-03-26

Applicant: The Secretary of State for Defence

Inventor： Sean Michael Tsi-ong Tipper

IPC: H04N25/40 ,  H04N25/779

CPC classification number: H04N25/40 ,  H04N25/779

Abstract: Techniques for detecting pulsed radiation. A CMOS sensor array being irradiated across at least a portion of the array with pulsed radiation is addressed using a rolling shutter operation. The sensor array is read to extract the integrated energy from each sensor element and convert the integrated energy into a pixel value for a pixel in a radiation image. A pulse detection operation is then applied to the radiation image to obtain a pulse repetition frequency of the pulsed radiation. The pulse detection operation includes extracting a beat signal, calculating a beat frequency and peak to trough ratio from the beat signal, and determining the pulse repetition frequency therefrom. Particularly suited to the technical field of pulsed laser detection. Also relates to a pulse detector for the same.

公开(公告)号：US20230146106A1

公开(公告)日：2023-05-11

申请号：US17907588

申请日：2021-03-26

Applicant: The Secretary of State for Defence

Inventor： Sean Michael Tsi-ong Tipper

IPC: H04N25/40 ,  H04N25/779

CPC classification number: H04N25/40 ,  H04N25/779

Abstract: Techniques for detecting pulsed radiation. A CMOS sensor array being irradiated across at least a portion of the array with pulsed radiation is addressed using a rolling shutter operation. The sensor array is read to extract the integrated energy from each sensor element and convert the integrated energy into a pixel value for a pixel in a radiation image. A pulse detection operation is then applied to the radiation image to obtain a pulse repetition frequency of the pulsed radiation. The pulse detection operation includes of extracting a beat signal, calculating a beat frequency and peak to trough ratio from the beat signal, and determining the pulse repetition frequency therefrom. Particularly suited to the technical field of pulsed laser detection. Also relates to a pulse detector for the same.