High‐Speed Active Imaging Based Target Deviation Measurement and Optical Calibration for Laser Screen Velocimetry Systems

Accurate projectile velocity measurement is essential for weapon system evaluation, where laser screen velocimetry (LSVM) systems face inherent limitations owing to photoelectric response inconsistencies between detection screens, causing target deviation errors that compromise the measurement precision. In this study, a high‐speed active imaging solution that combines asynchronous timing control and optical calibration is proposed to address these challenges. The methodology employs rising/falling edge detection to synchronize a pulsed laser source and high‐speed camera, while a standardized marker enables the spatial calibration of virtual laser screens through image processing. The experimental results demonstrate successful quantification and correction of target deviations between the starting and stopping screens. By calibrating the actual intertarget distance, the proposed method successfully eliminates systematic spatial deviations of up to 0.597 mm, which translates to an absolute velocity correction of approximately 2.46 m/s at a baseline velocity of 800 m/s. These findings establish a robust framework for photoelectric system calibration in ballistic applications, offering both theoretical advancements in high‐speed photoelectric detection and practical field deployable solutions for weapons testing. The integrated approach resolves a persistent bottleneck in LSVM accuracy while providing methodological support for related high‐speed measurement applications.