Fully polarized streak tube laser imaging radar device

Abstract

The invention discloses a fully polarized streak tube laser imaging radar device. The fully polarized streak tube laser imaging radar device comprises a laser, a beam expander arranged on an output light path of the laser, a receiving antenna arranged on an outgoing light path of a to-be-detected target, a slit formed in an output light path of the receiving antenna, a focusing lens arranged on anoutgoing light path of the slit, a polarizing beam splitting system arranged on an output light path of the focusing lens, a streak tube detector arranged on an output light path of the polarizing beam splitting system, an image acquisition device arranged on the streak tube detector, and an image processing device connected with the image acquisition device. The fully polarized streak tube laserimaging radar device can obtain intensity information, distance information and full polarization information of the to-be-detected target simultaneously, thus the detection and recognition accuracyof the to-be-detected target can be improved, and reliability is high.

Description

technical field [0001] The invention relates to the technical field of photoelectric imaging, in particular to a fully polarized stripe tube laser imaging radar device. Background technique [0002] Effective detection and recognition of specific targets in complex backgrounds, especially moving targets with hidden capabilities, is an important content in the field of target detection and perception in the military and civilian fields. Its purpose is to capture the target of interest by means of optics, acoustics and electronics, and then obtain its shape, size, position, function and other information to complete the target identification or tracking. From the means of detection, it can be divided into radio detection and photoelectric detection. [0003] According to different imaging bands and principles, photoelectric detection is mainly divided into intensity detection (visible light, infrared, ultraviolet and other bands), spectral detection, lidar detection, polariza...

AI Technical Summary

Problems solved by technology

[0005] At present, the stripe tube laser radar device mainly includes the following types: 1. The focal plane imaging system using the stripe tube as the detector uses a pulsed semiconductor-pumped solid-state laser as the transmitter. When the laser emits a line light pulse, The receiving system will get an image, which is called "flash" single-slit stripe tube laser imaging radar. This system cannot obtain the polarization information of the target, and has high requirements on weather conditions. Poor detection of ocean conditions due to sea surface fogging

2. Multi-spectral stripe tube laser imaging radar, which uses multi-wavelength lasers to emit mixed multi-wavelength laser beams. The mixed multi-wavelength laser beams pass through a beam expander prism, and the receiving system will receive echo laser beams of different wavelengths, and then in the stripe tube The internal fluorescent screen forms multi-spectral fringe images in different areas, and couples the images on the CCD camera. This radar has high requirements on weather conditions, and the detection results of the ocean conditions caused by heavy fog or sea surface fogging caused by strong winds are poor.

3. Stripe tube laser radar polarization imaging system, which is based on the stripe tube laser polarization radar system, respectively adds a polarization state generator composed of a polarizer and a wave plate in the transmitting system and a receiving system, and a 1 / 4 wave plate with a The polarization state analyzer composed of the Raston prism, depolarizes the scattered light obtained by the receiving system by the polarization state analyzer, obtains two beams of linearly polarized light with orthogonal vibration directions, and forms two beams of stripes through the stripe tube detector, and then the CCD Recorded by a camera, which cannot obtain complete polarization information of light

[0006] It can be seen that the current striped tube lidar device can only obtain the intensity information and distance information of the measured target, so the measurement conditions are harsh in the actual measurement, and the measurement accuracy is also greatly reduced, that is, the intensity of the measured target cannot be obtained at the same time. Information, distance information and full polarization information lead to low accuracy of target detection and identification, and cannot be applied to military hidden and camouflaged target detection and identification

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