Study The Point Spread Function And The Line Spread Function For Hexagonal Aperture

In this research, hexagonal aperture has been studied) which consists of two trapezoidal shapes (The diffraction pattern in the exit pupil formed by this aperture was studied when the object was a point using the point spread function (PSF), and also when the object is an infinite line using the line spread function (LSF). This study was done for a diffraction-limited system, and with the presence of some aberrations. The effects of adding focus error (first-order aberrations) and spherical aberration (second-order aberration) were studied, with values of aberration factor equal ) 0.25λ, 0.5 λ, 0.75 λ, and 1 λ ), which resulted in a larger central intensity (Strehl ratio) and a reduce in FWHM of the curves.