In this paper, the optimal Fresnel lenses are designed by Zemax software.
The fundamental problem of the Fresnel lenses is the beam divergence, which was
resolved by decreeing the output stain diameter on the image plane. For this purpose,
two types of radial and cylindrical Fresnel lenses are simulated with different grooves
using Global and Hammer optimization methods. The minimum output stain diameter in
radial and cylindrical modes are computed for Fresnel surfaces and different
components of the Fresnel lenses. The Results show that the Fresnel lenses have a
spherical and distortion aberration. By optimizing the optical system with the Global
and Hammer methods, the output stain diameter can be controlled and the beams are
focused. Numerical results and conclusions are given in our paper by changing the
distance between the elements, radius, material, height, depth and width پرونده مقاله