Active imaging system using time programmed dwell
First Claim
1. An imaging system for detection of a target comprising:
- an electromagnetic radiation source for generating a series of interrogating pulse signals directed towards the target;
receiver means operable to be triggered for receiving during preselected time intervals reflected interrogating pulse signals from the target and for generating a resultant output signal; and
circuit means connected for triggering said receiver means to receive reflected interrogating pulse signals according to a predetermined time function such that the number of reflected interrogating pulse signals received by said receiver means is dependent on the distance between said receiver means and the target, said receiver means thus generating a resultant output signal to provide a signal of constant amplitude independent of the distance between said receiver means and the target.
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Accused Products
Abstract
An imaging system for detection of a target is provided which compensates for range dependency of a reflected interrogating signal. The imaging system includes an electromagnetic radiation source for generating a series of interrogating pulse signals directed towards the target. A receiver is provided and operable to be triggered for receiving during preselected time intervals the reflected interrogating pulse signals from the target and for generating a resultant output signal. The system further includes circuitry connected for triggering the receiver to receive reflected interrogating pulse signals according to a predetermined time function. The number of reflected interrogating pulse signals thus received by the receiver is dependent on the distance between the receiver and the target. The receiver thus generates a resultant output signal to provide a signal of constant amplitude independent of the distance between the receiver and target.
33 Citations
31 Claims
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1. An imaging system for detection of a target comprising:
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an electromagnetic radiation source for generating a series of interrogating pulse signals directed towards the target; receiver means operable to be triggered for receiving during preselected time intervals reflected interrogating pulse signals from the target and for generating a resultant output signal; and circuit means connected for triggering said receiver means to receive reflected interrogating pulse signals according to a predetermined time function such that the number of reflected interrogating pulse signals received by said receiver means is dependent on the distance between said receiver means and the target, said receiver means thus generating a resultant output signal to provide a signal of constant amplitude independent of the distance between said receiver means and the target. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An active imaging system for detecting a target comprising:
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an electromagnetic radiation source for generating gated interrogating pulse signals having a fixed gate width and directed towards the target; receiver means for being triggered to receive reflected interrogating pulse signals from the target during preselected fixed window intervals; means for synchronizing the operation of said source and said receiver means; circuit means for triggering said receiver means to receive reflected interrogating pulse signals during said preselected fixed window intervals at a rate dependent upon the distance between the target and said receiver means; and means for integrating said received reflected interrogating pulse signals to generate a resultant signal of constant amplitude independent of the distance between said receiver means and the target. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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24. An active imaging system for detection of a target comprising:
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laser means for generating gated interrogating pulse signals having a fixed gate width and directed towards the target; a gated image intensifier for being triggered to receive reflected interrogating pulse signals from the target during preselected fixed window intervals; means for synchronizing the operation of said laser means and said image intensifier; circuit means interconnected between said means for synchronizing and said gated image intensifier for triggering said image intensifier to receive reflected interrogating signals during said preselected fixed window intervals at a rate dependent upon the distance between the target and said image intensifier; and means for integrating said received reflected interrogating pulse signals to generate a resultant signal independent of the distance between said image intensifier and the target. - View Dependent Claims (25, 26, 27)
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28. A method employing an active imaging system for detection of a target comprising:
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generating a series of interrogating pulse signals having a fixed gate width directed towards the target; receiving at a receiver reflected interrogating pulse signals from the target during preselected fixed window intervals; triggering said receiver to receive said reflected interrogating pulse signals during said preselected fixed window intervals; and varying the triggering of said receiver in dependence upon the distance between the target and said receiver. - View Dependent Claims (29, 30, 31)
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Specification