Study the effect of apodization on the imaging properties of optical systems with coma aberration

Strehl-Ratio is one of the important Image quality assessment parameters, especially when the optical system has some aberrations. The effect of pupil shapes on the resolution of an optical system was evaluated. These systems are apodized with the Hanning amplitude filter under the influence of the coma aberration. The analytically computed results are illustrated graphically in terms of point spread function curves under various considerations of the coma aberrations and a different degree of amplitude apodization. This study shows that system with a square aperture of half diagonal (1) has the high Strehl ratio value. And systems with a square aperture of half diagonal (⁠$π2$⁠), is, the less affected by the apodizted Hanning filter.