초록 ▼

An optical system for determining if a target object is an object of a first kind, including means for illuminating the target object along an incident path with coherent light of a selected nature means, for retro-reflecting coherent light from an object of a first kind, means for detecting the nat

An optical system for determining if a target object is an object of a first kind, including means for illuminating the target object along an incident path with coherent light of a selected nature means, for retro-reflecting coherent light from an object of a first kind, means for detecting the nature of light reflected from at least a portion of the target object, means for comparing the nature of the detected light to the selected nature, and means for indicating that said target object is an object of a first kind if the nature of said detected light is the same as the selected nature. Alternative embodiments include encoding interrogating and retro-reflected light signals at both the interrogating station and target stations, and the use of a verification signal directed at the target object prior to illumination of the target object with an interrogating beam. Phase conjugate mirrors are preferably employed as the retro-reflecting means and it is preferable that the phase conjugate mirror be comprised of HgCdTe. Methods of determining whether a target object is an object of a first kind, corresponding to the disclosed devices, are also disclosed.

대표청구항 ▼

An optical system for determining if a target object is an object of the first kind, comprising: means for illuminating said target object along an incident path with coherent light of a selected nature; means for retro-reflecting coherent light from said object of a first kind; means for detecting

An optical system for determining if a target object is an object of the first kind, comprising: means for illuminating said target object along an incident path with coherent light of a selected nature; means for retro-reflecting coherent light from said object of a first kind; means for detecting the nature of light reflected back along said incident path; means for comparing the nature of said detected light to the nature of said coherent light; and means for indicating that said target object is an object of a first kind if the nature of said detected light is the same as said selected nature.