A pair of axicons with an adjustable separation between them is used to generate a variable
diameter ring beam with high efficiency. This beam illuminates a lens to produce quasi …

Reflective axicons, widely used in optical alignment and Bessel–Gauss beam generation,
require a highly accurate cone angle and surface metrology. However, current methods …

Bessel light beam formation from annular fields is important for many applications related to
laser remote sensing and also for the free-space laser communication. Annular beams have …

In this work, the process of transformation of an annular beam in a Bessel-like field due to
diffraction during propagation in a free space over long distances and due to the focusing …

Features of the Bragg diffraction of annular light beams on a longitudinal ultrasound wave
propagating along optical axis of TeO 2 and NaBi\left(MoO_4\right) 2 crystals are …

Аннотация Исследован процесс трансформации кольцевого пучка в поле бесселева
типа за счет дифракции при распространении в свободном пространстве на большие …

Данная работа посвящена приближенному вычислению математических ожиданий
нелинейных функционалов от решения линейного уравнения Скорохода с ведущим …