We present a family of asymmetric phase masks that extends the depth of field of an optical system. To verify our proposal, we compute several modulation transfer functions with focus errors, and we report numerical simulations of the images that can be achieved by use of our proposed procedure.
© 2004 Optical Society of America
Albertina Castro and Jorge Ojeda-Castañeda, "Asymmetric Phase Masks for Extended Depth of Field," Appl. Opt. 43, 3474-3479 (2004)