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Methods and systems for flash detection

  • US 10,175,101 B2
  • Filed: 12/21/2015
  • Issued: 01/08/2019
  • Est. Priority Date: 12/21/2014
  • Status: Active Grant
First Claim
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1. An optical system suitable for detecting muzzle flashes in a scene, the optical system comprising:

  • a first optical module customized for detecting flashes at short range of the optical system by analyzing irradiance received on a first infrared sensor;

    a second optical module customized for detecting flashes at long range of the optical system by analyzing irradiance received on a second infrared sensor;

    wherein;

    the first and second optical modules are configured to share a common field of view, andthe first and second optical modules are configured so that a first maximum detection distance at which a predetermined flash is sensed by the first infrared sensor with a predetermined marginal signal to noise ratio is superior to a minimum detection distance of the second optical module at which the predetermined flash saturates the second infrared sensor so that a predetermined overlap occurs between first and second optical modules detection ranges,wherein the optical system is configured to;

    detect a flash at a short range based on detection results of the first optical module,detect a flash at long range based on detection results of the second optical module, anddetect a flash at the predetermined overlap based on detection results of both the first and second optical modules.

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