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Ultra wide band millimeter wave holographic ``3-D`` imaging of concealed targets on mannequins
| 题名： | Ultra wide band millimeter wave holographic ``3-D`` imaging of concealed targets on mannequins |
| 作者： | Gribble, R.P.;Hall, T.E.;Collins, H.D.; |
| 关键词： | 98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL PROTECTION; HOLOGRAPHY; WEAPONS; DETECTION; MAN; INSPECTION; SECURITY; AIRPORTS; IMPLEMENTATION; REAL TIME SYSTEMS; IMAGE PROCESSING; COMMERCIALIZATION; NUCLEAR FACILITIES; MILITARY FACILITIES; GOVERNMENT BUILDINGS |
| 摘要： | Ultra wide band (chirp frequency) millimeter wave ``3-D`` holography is a unique technique for imaging concealed targets on human subjects with extremely high lateral and depth resolution. Recent ``3-D`` holographic images of full size mannequins with concealed weapons illustrate the efficacy of this technique for airport security. A chirp frequency (24 GHz to 40 GHz) holographic system was used to construct extremely high resolution images (optical quality) using polyrod antenna in a bi-static configuration using an x-y scanner. Millimeter wave chirp frequency holography can be simply described as a multi-frequency detection and imaging technique where the target`s reflected signals are decomposed into discrete frequency holograms and reconstructed into a single composite ``3-D`` image. The implementation of this technology for security at airports, government installations, etc., will require real-time (video rate) data acquisition and computer image reconstruction of large volumetric data sets. This implies rapid scanning techniques or large, complex ``2-D`` arrays and high speed computing for successful commercialization of this technology. |
| 总页数： | 7p |
| 报告类型： | 科技报告 |
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