Threat detection
First Claim
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1. A method of threat detection comprising:
- illuminating a scene with pulsed short-wavelength infrared (SWIR) illumination;
receiving SWIR illumination reflected back from the scene with a receiving device configured to detect pulsed SWIR illumination;
analyzing the received SWIR illumination; and
attributing the presence of man-made optics in the scene to the received SWIR illumination, wherein illuminating, receiving, and analyzing are performed by a single rifle-mounted laser device, wherein the receiving is performed by a SWIR-sensitive focal plane array (FPA) of a receiving device that is operatively connected to a module for pixel-wise processing of the received SWIR illumination, wherein the FPA is configured for global threshold control, wherein the illuminating the scene includes illuminating the scene in a series of pulsed illumination events, and wherein the receiving includes receiving SWIR illumination reflections for each of the pulsed illumination events at a different respective threshold level of the FPA, further comprising generating a respective pulse event bitmap for each threshold level of the FPA.
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Abstract
A method of threat detection includes illuminating a scene with short-wavelength infrared (SWIR) illumination and receiving a return of the SWIR illumination reflected back from the scene. The method includes analyzing the return of the SWIR illumination to detect presence of man-made optics in the scene. Illuminating, receiving, and analyzing can be performed by a device, e.g., a rifle-mounted laser device.
39 Citations
9 Claims
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1. A method of threat detection comprising:
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illuminating a scene with pulsed short-wavelength infrared (SWIR) illumination; receiving SWIR illumination reflected back from the scene with a receiving device configured to detect pulsed SWIR illumination; analyzing the received SWIR illumination; and attributing the presence of man-made optics in the scene to the received SWIR illumination, wherein illuminating, receiving, and analyzing are performed by a single rifle-mounted laser device, wherein the receiving is performed by a SWIR-sensitive focal plane array (FPA) of a receiving device that is operatively connected to a module for pixel-wise processing of the received SWIR illumination, wherein the FPA is configured for global threshold control, wherein the illuminating the scene includes illuminating the scene in a series of pulsed illumination events, and wherein the receiving includes receiving SWIR illumination reflections for each of the pulsed illumination events at a different respective threshold level of the FPA, further comprising generating a respective pulse event bitmap for each threshold level of the FPA. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system comprising:
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a SWIR-sensitive FPA configured to receive SWIR illumination reflected from a scene; and a module operatively connected to the FPA configured to analyze the received reflections for the presence of man-made optics in the scene, wherein the FPA is operatively connected to the module for pixel-wise processing of received SWIR illumination, wherein the FPA is configured for global threshold control, further comprising a SWIR illumination source configured to illuminate the scene with SWIR illumination, wherein the SWIR-sensitive FPA, SWIR illumination source, and module are all part of a single portable device, wherein the device is a rifle mounted laser device, wherein the SWIR illumination source is configured to illuminate the scene in a series of pulsed illumination events, and wherein the FPA is configured for receiving SWIR illumination reflections for each of the pulsed illumination events at a different respective threshold level of the FPA, and wherein the module is configured to generate a respective pulse event bitmap for each threshold level of the FPA. - View Dependent Claims (9)
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Specification