Design of two- and three-element diffractive Keplerian telescopes

Abstract

Design procedures for simple two- and three-element diffractive telescopes, suitable for monochromatic applications, are described. We obtained the basic configuration for the two-element design analytically by solving design equations to set the Seidel aberrations to target values. Computer optimization is used to complete the design of the doublet and triplet telescopes. The two- and three-element designs exhibit similar optical performance and diffraction efficiency. We show that diffraction-limited performance can be obtained from these all-diffractive systems.