title: Polarization coded aperture.
abstract: Two examples are presented to illustrate the advantages of polarization coded apertures, in which the incoming light will rotate its polarization at a portion of an aperture. In the first example the depth of field of a diffraction limited lens is increased without sacrificing the light throughput; in the second example the axial focal intensity of a pixelated Fresnel zone plate is increased by 100%. Both examples work for linearly polarized or unpolarized illumination.
authors.forename: Wanli
authors.initials: W
authors.lastname: Chi
authors.forename: Kaiqin
authors.initials: K
authors.lastname: Chu
authors.forename: Nicholas
authors.initials: N
authors.lastname: George