Feature recognition system
First Claim
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1. A feature recognition system for identifying the source of a radiated energy signal comprising, in combination:
- receiver means adapted to receive the radiated signal and for producing an electrical output control signal modulated according to the radiated signal;
first laser means electrically connected to said receiver means to receive the control signal and for producing a first collimated coherent light beam at its output having a frequency which varies according to the control signal;
second laser means for producing a second collimated coherent light beam at its output having a constant frequency;
first optical means positioned to receive said first and second beams for superimposing one of said light beams on the other producing thereby a third collimated coherent light beam at its output with interferometric lines;
second optical means positioned to receive and condense said third beam and adapted to receive photosensitive film for exposing the film to said third beam at the focal point;
processor means positioned to receive the exposed film from said second optical means and develop the film forming thereby a hologram; and
third optical means positioned to receive said second beam and adapted to receive said hologram for cross-correlating the features of a reference with said hologram, the reference having the recognizable unique features of a known radiated energy source imaged on a transparent material.
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Abstract
9. A feature recognition system for identifying an unknown signal source, mprising:
First means for receiving a signal from the unknown signal source and producing a hologram thereof;
Second means for receiving the hologram and for correlating it with a signal reference of known sources; and
Third means associated with said second means for identifying the unknown source.
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Citations
10 Claims
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1. A feature recognition system for identifying the source of a radiated energy signal comprising, in combination:
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receiver means adapted to receive the radiated signal and for producing an electrical output control signal modulated according to the radiated signal; first laser means electrically connected to said receiver means to receive the control signal and for producing a first collimated coherent light beam at its output having a frequency which varies according to the control signal; second laser means for producing a second collimated coherent light beam at its output having a constant frequency; first optical means positioned to receive said first and second beams for superimposing one of said light beams on the other producing thereby a third collimated coherent light beam at its output with interferometric lines; second optical means positioned to receive and condense said third beam and adapted to receive photosensitive film for exposing the film to said third beam at the focal point; processor means positioned to receive the exposed film from said second optical means and develop the film forming thereby a hologram; and third optical means positioned to receive said second beam and adapted to receive said hologram for cross-correlating the features of a reference with said hologram, the reference having the recognizable unique features of a known radiated energy source imaged on a transparent material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A feature recognition system for identifying an unknown signal source, comprising:
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first means for receiving a signal from the unknown signal source and producing a hologram thereof; second means for receiving the hologram and for correlating it with a signal reference of known sources; and third means associated with said second means for identifying the unknown source.
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10. An acoustical signature recognition system for identifying an underwater sound source comprising, in combination:
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receiver means adapted to receive an RF signal from a sonobuoy and for producing an electrical output control signal modulated according to the acoustical signal detected by the sonobuoy; first laser means electrically connected to said receiver means to receive the control signal and for producing a first collimated coherent light beam at its output having a frequency which varies according to the control signal; second laser means for producing a second collimated coherent light beam at its output having a constant frequency; first optical means positioned to receive said first and second beams fro superimposing one of said beams on the other producing thereby a third collimated coherent light beam at its output with interferometric lines indicative of the frequency spectrum of the sonobuoy-detected acoustical signal; second optical means positioned to receive and condense a third beam and adapted to receive photosensitive film for exposing the film to said third beam at the focal point; processor means positioned to receive the exposed film from said second optical means and develop the film forming thereby a hologram of the frequency spectrum of the sonobuoy-detected signal; and third optical means positioned to receive said second beam and adapted to receive said hologram for cross-correlating the acoustical signatures of a reference with said hologram, the reference having a plurality of recognizable unique acoustical signatures of known underwater sound sources imaged on a transparent material.
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Specification