Abstract

Although highly efficient chirped grating lenses have been reported^[1−7], their performance that will combine high efficiency η with large angular field of view Δθ or high η with low F-number is limited by the phase distortion in the diffraction process and by fabrication tolerances. In this paper, we will show how the coupling coefficient K_c and the minimum periodicity Λ_min will limit the lens performance (i.e. η, Δθ and F). The efficiency is also sensitive to the variation of the line width to space width ratio obtained in the lithographic process. However, it is insenstive to the position accuracy of the individual grating grooves.

© 1984 Optical Society of America