An autostereoscopic display includes an image forming device and a
substrate having alternating strips, where strips having a first optical
property are separated by strips having a different optical property. This
substrate may be composed of alternating strips of polarization film
separated by clear, nonpolarizing strips. Alternately, this substrate may
be composed of first alternating strips that retard a component of
linearly polarized light by one-half wavelength, separated by second
alternating strips that retard a component of linearly polarized light by
one wavelength. A removable, separate polarizing substrate may be
removably placed in front of the substrate containing the alternating
strips. When the removable polarizing substrate is placed in front of the
strips in a certain orientation, autostereoscopic imaging is viewed by the
observer, and when this polarizing substrate is removed, 2D imaging is
viewed.