Semi-active optical tracking system

Details Semi-active optical tracking system Semi-active optical tracking system

2009-05-08

2011-11-01

Alsomiri, Isam (Department: 3665)

Optics: measuring and testing

Optical element or reticle responds to relative velocity of...

C356S139040

Reexamination Certificate

active

08049870

ABSTRACT:
A system and method for tracking an airborne target including an illumination source (e.g., a diode laser array) is used to enhance a target signature and a detector (e.g., a passive high-speed camera) is used to detect to electromagnetic radiation (e.g., infrared radiation) reflected off the target. The received electromagnetic radiation may be processed by a digital computer and passed through a spatial filter that implements a band limited edge detection operation in the frequency domain. The filter may remove low spatial frequencies that attenuate soft edged clutter such as clouds and smoke as well as filter out artifacts and attenuated medium to high spatial frequencies to inhibit speckle noise from the detector as well as speckle from the laser return off the target.

REFERENCES:
patent: 6265704 (2001-07-01), Livingston
patent: 6849841 (2005-02-01), Byren et al.
patent: 7041953 (2006-05-01), Byren
patent: 7477368 (2009-01-01), Guthrie

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