Our model is unrolled to map an input orientation sequence (from time t-8 to t-1) to an output one (t,t + 1…) with trajectray tracing. Cyan labels are −1/2 defect while purple ones are +1/2.

Fast and high-resolution x-ray imaging demands scintillator films with negligible afterglow, high scintillation yield, and minimized cross-talk. However, grain boundaries (GBs) are abundant in polycrystalline scintillator film, and, for current inorganic scintillators, detrimental dangling bonds at GBs inevitably extend radioluminescence lifetime and increase nonradiative recombination loss, deteriorating afterglow and scintillation yield. Here, we demonstrate that scintillators with one-dimensional (1D) crystal structure, Cs 5 Cu 3 Cl 6 I 2 explored here, possess benign GBs without dangling bonds, yielding nearly identical afterglow and scintillation yield for single crystals and polycrystalline films. Because of its 1D crystal structure, Cs 5 Cu 3 Cl 6 I 2 films with desired columnar morphology are easily obtained via close space sublimation, exhibit negligible afterglow (0.1% at 10 ms) and high scintillation yield (1.2 times of CsI:Tl). We have also demonstrated fast x-ray imaging with 27 line pairs mm −1 resolution and frame rate up to 33 fps, surpassing most existing scintillators. We believe that the 1D scintillators can greatly boost x-ray imaging performance.

To address the main section misalignment of rotating Risley prisms in a camera imaging system, a zero calibration method for a Risley prism main section is proposed according to the dispersion characteristics of the prisms–camera imaging. The principal component analysis method and the Radon transform method are combined to establish an effective mapping relationship between the prism main section positions and the prismatic dispersion characteristics using the camera dispersion image as references. The estimation of the dispersion direction was realized by referring to the motion blur estimation method and verified by experiment. As a result, the target-free self-calibration of the prism main sections in the camera coordinate system can be carried out under a prisms–camera intact assembly mode.