Optical detection system and method for detecting a hostile optical component
View Patent ↗An optical detection system for detecting a hostile optical component without exposing the surrounding to unnecessary hazards is disclosed. The system comprises a laser unit configured to provide an adjustable laser beam along an optical path to scan for the optic component or to act as jammer by providing a target spoofing; a single aperture for the optical path; a detector configured to detect through the single aperture retroreflections of the laser beam at the optical component; and a camera for detecting through the single aperture potential candidates for the hostile optical component.
1 . An optical detection system for detecting a hostile optical component without exposing the surrounding to unnecessary hazards, the system comprising:
a laser unit configured to provide an adjustable laser beam along an optical path to scan for the optic component or to act as jammer by providing a target spoofing;
a single aperture for the optical path;
a detector configured to detect through the single aperture retroreflections of the laser beam at the hostile optical component;
a camera for detecting through the single aperture potential candidates for the hostile optical component; and
a control unit, the control unit being configured to: (i) determine a distance between the optical detection system and the optical component; (ii) utilize the laser unit for a laser-based countermeasure, and (iii) adjust the divergence of the laser beam, based on the determined distance, to minimize a laser hazard area for the laser beam.
2 . The optical detection system according to claim 1 , wherein the laser unit is configured to adjust a divergence of the laser beam to adapt an energy impact on an object in the optical path.
3 . The optical detection system according to claim 1 , wherein the laser unit is configured to select wavelengths of the laser beam to:
reduce a scattering in atmosphere, by acting as a mid-infrared Band 1 laser, and/or
act as soft-kill countermeasure, especially by acting as Band 4a/4b laser.
4 . The optical detection system according to claim 1 , wherein the detector is configured to detect other laser sources, in particular to detect laser guided missiles.
5 . The optical detection system according to claim 1 , wherein the camera includes a multispectral camera suitable for a target identification and to enable the target tracking.
6 . The optical detection system according to claim 1 , further comprising:
a transparent dome head mounted to cover the single aperture; and
a mirror mounted in the dome head and configured to enable a coverage area for the optical path in at least one of following angular regions:
in azimuth: ±60°, ±90°, 360° surround view
in elevation: ±10°, ±15°, up to 15°, up to 45°, up to 90°, up to 120°.
7 . The optical detection system according to claim 1 , further comprising one or more partial transparent mirrors configured to split the optical path into three sub-paths between the single aperture and the laser unit, the detector, and the camera.
8 . The optical detection system according to claim 1 , wherein the control unit is further configured for at least one of the following:
tilting and rotating the mirror mounted in the dome head to scan a desired coverage area;
processing of images captured by the camera;
processing detection signals of the detector;
implementing an artificial intelligence algorithm or other kinds of image processing methods utilizing images as recorded by the SAS by verifying potential hostile components in the recorded images as true hostile components due to detected retro reflections.
9 . The optical detection system according to claim 8 , wherein the control unit is further configured to perform an object detection in the images captured by the camera and, based thereon, to adjust the divergence of the laser beam.
10 . The optical detection system according to claim 8 , wherein the system is configured to at least one of the following components:
a situational awareness system, SAS, a warner unit, a battle management system, additional sensors and/or effectors,
wherein the control unit is further configured to make available data from the detector unit or from the camera or derived data therefrom to the at least one component; and/or
wherein the control unit is further configured to receive context data about the scenery from the at least one component to provide a search for the optical component or other objects based on the received context data.
11 . The optical detection system according to claim 8 , wherein the control unit is further configured to enable at least one of the following functions:
situational awareness functionalities,
laser-based communication by controlling the laser unit,
providing a ranging application to determine a distance to the optical component,
to control the laser unit in a time multiplexed manner so that the transmit laser signals are transmitted in different time slots than the received signals.
12 . The optical detection system according to claim 11 , wherein the control unit is further configured to adjust the divergence of the laser beam emitted by the laser unit based on a threat classification, wherein the threat classification depends at least on the distance of the optical component.
13 . An apparatus suitable to be mounted on a periscope of a military vehicle, in particular a tank, comprising:
an optical detection system for detecting a hostile optical component without exposing the surrounding to unnecessary hazards, the system comprising:
a laser unit configured to provide an adjustable laser beam along an optical path to scan for the optic component or to act as jammer by providing a target spoofing;
a single aperture for the optical path;
a detector configured to detect through the single aperture retroreflections of the laser beam at the hostile optical component;
a camera for detecting through the single aperture potential candidates for the hostile optical component, and
a control unit, the control unit being configured to: (i) determine a distance between the optical detection system and the optical component; (ii) utilize the laser unit for a laser-based countermeasure, and (iii) adjust the divergence of the laser beam, based on the determined distance, to minimize a laser hazard area for the laser beam.
14 . A method for detecting a hostile optical component without exposing the surrounding to unnecessary hazards by utilizing a system with a laser unit, a single aperture for an optical path, a detector, and a camera, the method comprising:
transmitting an adjustable laser beam along the optical path through the single aperture to scan for the optic component or to act as jammer by providing a target spoofing;
detecting, by a detector unit through the single aperture, retroreflections of the laser beam at the optical component; and
detecting, by a camera through the single aperture, potential candidates for the hostile optical component;-
determining, by a control unit, a distance between the optical detection system and the optical component;
utilizing, by the control unit, the laser unit for a laser-based countermeasure; and
adjusting, by the control unit, the divergence of the laser beam of the laser unit, based on the determined distance, to minimize a laser hazard area for the laser beam.