Different coding schemes for diffractive multilevel microlenses are compared. A simple method to code a lens to get the optimum diffraction efficiency is given. Furthermore, a straightforward way to estimate the achievable efficiency of a lens is presented.
© 1995 Optical Society of America
Original Manuscript: June 28, 1995
Published: November 1, 1995
M. Kuittinen and H. P. Herzig, "Encoding of efficient diffractive microlenses," Opt. Lett. 20, 2156-2158 (1995)