A Novel Shearing Beam Imaging System and Target Image Acquisition Method

Abstract

The present application discloses a novel sheared beam imaging system and target imaging acquisition method, wherein the novel sheared beam imaging system applies the Fourier phase extraction technology to the traditional sheared beam imaging technology, thereby removing the traditional The two steps of beam frequency shifting and fringe demodulation in the cut-beam imaging system become possible, and then realize the purpose of simplifying the structure of the cut-beam imaging system, improving the imaging signal-to-noise ratio and reducing the complexity of the image reconstruction algorithm, which greatly The performance of the shearing beam imaging system is improved and its engineering realization is facilitated.

Description

technical field [0001] The present application relates to the field of optical imaging technology, and more specifically, to a novel sheared beam imaging system and a method for acquiring target images. Background technique [0002] The monitoring and identification technology for long-distance moving targets (such as aircraft, satellites or missiles, etc.) is of great significance to the fields of civil aviation dispatching, security early warning, military reconnaissance and other fields. The current long-distance imaging technology is mainly divided into passive long-distance imaging and active long-distance imaging. Passive long-distance imaging is a technology that uses the illumination of natural light sources to observe the detection target, and it is also the earliest imaging technology adopted. However, passive long-distance imaging has a strong dependence on environmental factors such as natural light sources, the relative position of the sun and the earth, and sk...

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Problems solved by technology

[0004] Up to now, the descriptions of the sheared beam imaging system in the published literature at home and abroad all include devices for frequency-shifting the emitted beam and demodulating the received fringe field, so as to distinguish the interference fringes contained in two orthogonal directions. The target feature information, accurately extract the phase information in two orthogonal directions, so as to achieve the purpose of reconstructing the target image; however, due to the existence of the device for frequency shifting the emitted beam and demodulating the received fringe field, the existing technology The sheared beam imaging system has the problems of relatively complex structure and low energy utilization rate of the detection laser.

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