We present a simple comprehensive treatment on the use of free-form optical elements, and
of nonuniform optical windows, either for increasing focal depth [by regulating the width of …

Radially symmetric pupil plane phase retardation functions are derived that extend focal
depth and alleviate third-order spherical aberration (SA) effects. The radial symmetry of …

A Sector-based Fresnel zone plate consists of a binary diffractive lens composed of a
mosaic of sectors of Fresnel zone plates with different focal distances. When these focal …

We propose a novel design method for a circularly symmetric phase mask to extend the
depth of focus. Using the free-form rational function as the solution space, we optimize the …

A quartic phase retardation function is described that reduces the variation of the intensity of
the focal point of incoherent imaging systems suffering from primary third-order aberrations …

A method for optimizing the strength of a parametric phase mask for a wavefront coding
imaging system is presented. The method is based on an optimization process that …

This paper gives a review on the design and use of both amplitude filters and phase filters to
achieve a large focal depth in incoherent imaging systems. Traditional optical system design …

A mathematical analysis of the frequency response of the wavefront-coding odd-symmetric
quadratic phase mask is presented. An exact solution for the optical transfer function of a …

Reflective imaging systems are typically limited to small field angles in order to avoid overly
large obscurations or off-axis aberrations. Reflective optics are often preferred in astronomy …

Conventional optical system design enhances the resolution of incoherent imaging systems
by optical-only manipulations or some type of post-processing of an image that has been …