Image blurring and spectral drift in imaging spectrometer system with an acousto-optic tunable filter and its application in UAV remote sensing

Research on hyperspectral polarization detection for unexploded ordnance target identification

“…The system structure is simple and easy to operate and can be used for imaging detection at different wavelengths in various scenarios. The Stokes vector of the target optical radiation is derived from equation ( 7), and the Stokes vector of the incident light can be solved using equation (6), and then combined with equation ( 8), the DoLP and AoLP information can be calculated for each point. Finally, the DoLP and AoLP images at 10 nm intervals in the 400-1000 nm band can be obtained, thus realizing the spectral polarization imaging detection of target features.…”

“…Unexploded ordnance (UXO) is a worldwide problem and a long-term hazard that can remain active and destructive for decades after the end of a conflict, thereby endangering humanity, making the rapid and effective detection of UXO of great importance to human civilization [1] . Spectral polarization imaging technology can obtain two-dimensional spatial information, one-dimensional spectral information, and polarization state information such as Degree of linear polarization(DoLP), Angle of linear polarization(AoLP), polarization ellipticity and rotation direction of the target, thus characterizing some information that is more difficult to characterize with intensity measurements, such as the chemical composition properties, roughness, surface texture characteristics and edge information of the target surface [2][3][4][5][6] . Compared to conventional light intensity detection, greatly increasing the information content of remote sensing data, which is of great value for target detection, especially in military applications [7] .…”

The Calibration Methods of Geometric Parameters of Crystal for Mid-Infrared Acousto-Optic Tunable Filter-Based Imaging Systems Design

“…For geometric calibration, scholars are mostly committed to the research of system-level calibration methods. For instance, Pozhar, Machikhin [ 23 , 24 , 25 ], and Liu Hong [ 26 ] focused on the quantitative description of the AOTF spatial aberrations. As mentioned earlier, the aberrations of the system are caused by the coupling of many factors.…”