We have implemented an exact ray trace through a plano-freeform surface for an incident
plane wavefront. We obtain two caustic surfaces and provide the critical points related to the …

A new method to design Hartmann type null screens to test either qualitatively or
quantitatively fast plano-convex aspherical lenses is presented. We design both radial and …

The aim of this work is threefold: first we obtain analytical expressions for the wavefront train
and the caustic associated with the refraction of a plane wavefront by an axicon lens, second …

The main contribution of the present work is to use the probability density of an Airy beam to
identify its maxima with the family of caustics associated with the wavefronts determined by …

We present a null-screen design for testing the shape quality of the reflecting surface of a
parabolic trough solar collector (PTSC). This technique is inexpensive, the whole surface is …

In this work we assume that we have two given optical media with constant refraction
indexes, which are separated by an arbitrary refracting surface. In one of the optical media …

In this work, we assume that in free space we have an observer, a smooth mirror, and an
object placed at arbitrary positions. The aim is to obtain, within the geometrical optics …

Lens phenomena, such as caustics, image distortions, and the formation of multiple images,
are commonly observed in various refracting geometries, including raindrops, drinking …

The aim of the present work is to obtain an integral representation of the field associated
with the refraction of a plane wave by an arbitrary surface. To this end, in the first part we …

The aim of the present work is twofold: first we obtain analytical expressions for both the
wavefronts and the caustic associated with the light rays reflected by a spherical mirror after …