Dual-waveband active-polarization target identification system for observing sea fog environment

Abstract

The invention relates to a dual-waveband active-polarization target identification system for observing a sea fog environment and belongs to the technical field of optical information processing. The system comprises a light source, a first light splitting system, an active polarization transmission system, a collimating and beam-expanding system, a second light splitting system, a dual-waveband polarization detection system, a joint-transform power spectrum generation system, a related peak generation system, a receiving system I, a receiving system II and a computer processing and controlling system. The detection principle of the traditional joint transform correlator is adopted, the advantages of polarization and infrared technologies in target detection are combined, and the existing passive detection mode is converted into an active polarization detection mode, so that the probability of target detection is increased. In the transmission system, a light splitting mode is adopted, and only one light source is adopted to complete active detection and target identification; in the receiving systems, a rotary control turntable is adopted, the system light path is simplified, the number of devices used by the systems is least on the premise of guaranteeing the quality of target identification, the operation is simple and convenient, and the implementation is easy.

Description

technical field [0001] The invention belongs to the technical field of optical information processing, in particular to a dual-band active polarization target recognition system for sea fog environment observation. Background technique [0002] Thick sea fog is the most common natural phenomenon in the southeastern coastal areas of my country, and it is shrouded by sea fog for most of the year. When sea fog forms, water droplets or ice crystals formed due to cooling or humidification that make the air saturated or close to saturation are suspended in the air, causing the light emitted by the target to be absorbed, scattered or refracted, blurring the target and its background, resulting in visibility decrease etc. Thick sea fog seriously interferes with satellite remote sensing and wireless communication, and will cause the complete failure of common visible light, infrared and other target recognition equipment, which limits the use of traditional optical correlation recog...

AI Technical Summary

Problems solved by technology

However, for the detection and identification of targets in deep sea areas, under the influence of sea fog and the limited visual observation of targets, only this passive detection method makes the monitoring and detection subject to energy limitations, which seriously affects the subsequent identification results.

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