Abstract: Aiming at eliminating the cat-eye effect of electro-optical devices and decreasing the probability that optics windows are detected by active laser reconnaissance systems, reflection properties of the cat-eye optical system with misaligned reticles are investigated. Based on the geometrical optics and the theory of angular spectrum diffraction, the characteristics of diffraction light field distribution that plane waves pass through a cat-eye optical system are deduced and then simulated. The reflection properties of the cat-eye optical system are validated by experimental methods. It is found that the misalign of reticles leads to elliptical deformation of echo spots on output reference planes, and oblique incidence of laser beams makes this phenomenon more obvious. Making use of the reflection properties may increase the difficulty of distinguishing shape-changed targets and diffused background, so as to improve the viability of electro-optical devices on the warfare.