Method and system for detection of objects
First Claim
1. A method for detection of an object, the method comprising:
- irradiating a target with two electromagnetic wave energy beams, a first beam at a first frequency and a second beam at a second frequency, the first frequency being lower than the second frequency, both beams being polarized in a first direction; and
determining a presence of an object by analyzing reflections of said first and second beams, wherein;
if there is a dominant reflection polarization in said first direction for both the first and second frequencies, then the target is considered not to have the object, andif there is a dominant reflection polarization in said first direction for only one of the first and second frequencies and a depolarized reflection at the other of the first and second frequencies, then the target is considered to have the object.
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Abstract
A method for detection of an object, the method including irradiating a target with two electromagnetic wave energy beams, a first beam at a first frequency and a second beam at a second frequency, the first frequency being lower than the second frequency, both beams being polarized in a first direction, and determining a presence of an object by analyzing reflections of the first and second beams, wherein if there is a dominant reflection polarization in the first direction for both the first and second frequencies, then the target is considered not to have the object, and if there is a dominant reflection polarization in the first direction for only one of the first and second frequencies and a depolarized reflection at the other of the first and second frequencies, then the target is considered to have the object.
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Citations
18 Claims
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1. A method for detection of an object, the method comprising:
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irradiating a target with two electromagnetic wave energy beams, a first beam at a first frequency and a second beam at a second frequency, the first frequency being lower than the second frequency, both beams being polarized in a first direction; and determining a presence of an object by analyzing reflections of said first and second beams, wherein; if there is a dominant reflection polarization in said first direction for both the first and second frequencies, then the target is considered not to have the object, and if there is a dominant reflection polarization in said first direction for only one of the first and second frequencies and a depolarized reflection at the other of the first and second frequencies, then the target is considered to have the object. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for detection of an object comprising:
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an irradiation device capable of irradiating a target with two electromagnetic wave energy beams, a first beam at a first frequency and a second beam at a second frequency, the first frequency being lower than the second frequency, both beams being polarized in a first direction; and a processor capable of determining a presence of an object in the target by analyzing reflections of said first and second beams and comparing the reflections with reflections obtained from a control volume known to have the object therein, wherein the target is considered to have the object if the polarization characteristics of the reflections of the first and second frequencies match the reflections obtained from the control volume within a predefined tolerance. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification