Gradient-index Alvarez lenses (GALs), a new, to the best of our knowledge, type of freeform
optical component, are surveyed in this work for their unique properties in generating …

Alvarez and Lohmann lenses are variable focus optical devices based on lateral shifts of two
lenses with cubic-type surfaces. I analyzed the optical performance of these types of lenses …

In this paper aberrations in Alvarez–Lohmann lenses are analyzed, and a semi-analytical
strategy for compensation is derived. An x–y polynomial model is used to describe the …

The design, fabrication, and characterization of miniature tunable multi-element Alvarez
lenses are reported in this paper. Optical design including optimal lens configuration and …

A gradient index (GRIN) lens, when processed by a spherical curvature at its endface, yields
the equivalent aspheric effect, if the curvature is adequately optimized with refractive index …

Lenses whose material is represented by a line on the glass map (nd equals f ((upsilon) d)),
as opposed by a point, like homogeneous glass, open the door to a wide variety of optical …

Alvarez lenses (AL) consist of a pair of aspheric surfaces such that their relative lateral
displacement results in tunable lenses from positive to negative powers. In applications …

In the past century, every component of an optical system has become lighter and smaller,
except the lenses. Typical lenses have too few degrees of freedom—just the refractive index …

Some effective uses of the radial gradient-index (GRIN) lens in zoom lens systems are
presented and lens design examples are shown. Also the effective Abbe number of a …

Fundamentally new classes of spherical gradient-index lenses with imaging and
concentration properties that approach the fundamental limits are derived. These analytic …