Speed detection method
First Claim
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1. A spatio-temporal characteristic determination method of improved reliability comprising:
- the radiation of energy,the configuration of a portion of said radiation as at least one energy beam which is directed into an at least one dimensional array comprising at least two subapertures within an interrogation region, said interrogation region comprising the full extent in angular range, sometimes called a full field of view, within which said determination method operates,the placement of a substantial fraction of said radiation from at least one subaperture beam within the target aperture, which substantially intercepts a portion of a remote target in at least one axis throughout the majority of its operating range, wherein said axis is nominally perpendicular to the propagation direction of said beam,the maintainance of a portion of said radiation within the angular subtense of said target in a manner sufficient for spatio-temporal characteristic determination, andthe collection and analysis of the radiation returned from said target.
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Abstract
An improved remote speed sensing technique is described which improves performance reliability by increasing the relative signal to noise ratio of a speed detector compared to that of a vehicle radar detector, by localizing at least one axis of the illuminating radiation to an angular region which is comparable to or within the subtence of the target vehicle, while minimizing illumination of a radar detector on the target vehicle.
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Citations
31 Claims
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1. A spatio-temporal characteristic determination method of improved reliability comprising:
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the radiation of energy, the configuration of a portion of said radiation as at least one energy beam which is directed into an at least one dimensional array comprising at least two subapertures within an interrogation region, said interrogation region comprising the full extent in angular range, sometimes called a full field of view, within which said determination method operates, the placement of a substantial fraction of said radiation from at least one subaperture beam within the target aperture, which substantially intercepts a portion of a remote target in at least one axis throughout the majority of its operating range, wherein said axis is nominally perpendicular to the propagation direction of said beam, the maintainance of a portion of said radiation within the angular subtense of said target in a manner sufficient for spatio-temporal characteristic determination, and the collection and analysis of the radiation returned from said target. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A covert method of determining at least one spatio-temporal characteristic of a target object comprising,
the generation of at least one beam of radiative by at least one energy spatio-temporal characteristic detector, the manipulation of the angular subtense of said beam in at least one axis perpendicular to the outgoing beam path of said beam, wherein said beam subtense is less in magnitude than three times the subtence of said target object along said axis, the propagation of said beam into a portion of a region of space defined in angular extent by a full field of view, wherein said full field of view is nominally perpendicular to said beam axis, the manipulation of the relative locations of said beam subtence and said target object subtence to substantially overlap within said full field of view, the collection of a portion of said beam which overlaps said target object, and the manipulation of the collected beam energy to determine at least one spatio-temporal characteristic of said target object.
Specification