Open AccessIMAGE-FORMING BY MEANS OF AXICON
Author(s) -
I. G. Palchikova,
Yuliya V. Zhukova,
Е. С. Смирнов
Publication year - 2021
Publication title -
interèkspo geo-sibirʹ
Language(s) - English
Resource type - Journals
ISSN - 2618-981X
DOI - 10.33764/2618-981x-2021-8-118-125
Subject(s) - axicon , conical surface , optics , diffraction , fresnel diffraction , physics , lens (geology) , geometry , mathematics , laser , laser beams
A theoretical analysis of the image-forming properties of the conical axicon in the scalar diffraction Kirchhoff-Fresnel approximation within the framework of the theory of linear systems revealed that the classical concept of the point spread function is not applicable to axicon images. In the near diffraction zone, a point light source is imaging by a conical axicon in the form of a segment along a straight line connecting the source and the center of the axicon. Moreover, different annular areas of the axicon form different sections on this segment. When used in tandem with a lens, the axicon can allow to increase the depth of focus. Preliminary experimental data have been obtained, which confirm the theoretical conclusions.