高 精 度 差 动 对 准 动 态 测 角 瞄 准 误 差 抑 制 技 术

High-precision aiming is the benchmark for angle measurement. It directly dictates the final measurement accuracy and is crucial in the precision measurement field. Dynamic aiming processes often suffer from optical spot distortion. This distortion separates the peak light intensity and energy centroid. Such spatial separation severely compromises overall aiming accuracy. We proposed an error suppression technique. It targeted high-precision dynamic laser angle measurement systems. Our method was based on differential alignment principles. A double-slit aperture was placed before the quadrant photodetector. The optical spot was systematically shaped and filtered. This setup acquired dual-channel light intensity signals. A differential operation processed these two distinct signals. This calculation achieved spatial error separation. It also provided dynamic optical signal compensation. The differential alignment curve featured a specific light intensity response. The zero-crossing point on this curve was highly sensitive. We utilized this extreme sensitivity for precise spot positioning. This mechanism fully eliminated the impact of optical spot distortion. Consequently,dynamic aiming accuracy remained completely unaffected. We conducted theoretical analysis and preliminary experimental verification. Tests utilized a standard prism on an air-bearing rotary system. Results prove this technique suppresses distortion-induced aiming errors. The optimized system achieves an aiming repeatability of 0. 03″. The angle measurement accuracy reliably reaches 0. 1″. We compared this approach with existing centroid location techniques. The proposed method offers superior aiming repeatability. It also guarantees higher angle measurement accuracy. This research provides a practical technical solution ideal for dynamic laser angle measurement applications.