Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2007-10-16
2007-10-16
Epps, Georgia (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C250S203100, C356S004010, C356S005020
Reexamination Certificate
active
11064589
ABSTRACT:
It has been found that target optics produce non-specular, augmented optical returns when interrogated by a laser pulse. This non-specular radiation is detected by an active laser search system employing a direct-reading, thresholded focal plane detector that is able to detect non-cooperating targets with optics that employ a detector or optical element at the focal plane of their receiving optics. The pulses returned from such target optics have a width commensurate with the original transmitted pulse width, whereas passive background noise and the spread out active returns from the ground exhibit temporally long returns. By setting the sensor threshold sufficiently high, the system discriminates against noise and clutter while at the same time reducing the number of sweeps required to detect a target within the search area.
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Lanier Kathryn G.
Marler Norman O.
O'Donnell Timothy J.
Weber Jonathan L.
BAE Systems Information And Electric Systems Integration Inc.
Epps Georgia
Long Daniel J.
Tendler Robert K.
Williams Don
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