Single detector compound axis system employs a two-axis mirror to achieve target acquisition.

Airborne electro-optical countermeasure systems necessitate designs that are both lightweight and miniaturized. This study examines a single-detector composite-axis system that integrates a large-stroke, large-aperture two-axis mirror for coarse tracking tasks and a piezoelectric fast-steering mirror for fine tracking adjustments. Addressing the system's initial pointing and spiral scanning challenges, the study derives dynamic target-pointing equations using coordinate transformation and optical geometry.