corresponding to an OTF with misfocus of 
.
.
. Notice that
radial lines through this function are insensitive to angle, for a broad range of
angles.
and misfocus
of 
. The smooth curve is the stationary phase approximation of the
OTF. The other curve is the calculated OTF.
and misfocus
of 0, 15, and 30.
of 0, the dashed line is for of 15, and the dashed-dotted line is
for of 30. Notice that the vertical scale is different than that of figure
5.
Figure 1: Ambiguity function of rectangular aperture. The radial line has a
slope of corresponding to an OTF with misfocus of .
Figure 2: Misfocus OTF of the standard optical system with misfocus parameter of
.
Figure 3: Magnitude of the ambiguity function of the cubic-pm function with
. Notice that
radial lines through this function are insensitive to angle, for a broad range of
angles.
Figure 4: Magnitude of the OTF of the cubic-pm system with and misfocus
of . The smooth curve is the stationary phase approximation of the
OTF. The other curve is the calculated OTF.
Figure 5: Magnitude of OTFs from the cubic-pm system with and misfocus
of 0, 15, and 30.
Figure 6: Magnitude of OTFs from the standard optical system. The solid line
denotes the OTF with a misfocus
of 0, the dashed line is for of 15, and the dashed-dotted line is
for of 30. Notice that the vertical scale is different than that of figure
5.
Figure 7: Normalized full width at half maximum amplitude (FWHM) of the PSF of the
cubic-pm optical/digital system with comparison to that of the standard optical system.
Figure 8: Simulated images of a spoke target from standard optical system (a, c, & e) and
cubic-pm optical/digital system (b,d, & f). (a,b)
Geometrically infocus, (c,d) mild misfocus, and (e,f) extreme misfocus.
Figure 9: Magnitude of the digital filter transfer function
used in simulations of the cubic-pm optical/digital
system.
Figure 10: Ratio of the Fisher information of misfocus, assuming a point
object, of the
standard optical system over the Fisher information of misfocus for the cubic-pm optical/digital system.