A study on reducing of the focal spot size using spatial filtering and phase apodization

International Conference of Young Scientists and Specialists "Optics-2015"

Savelyev, D.^1,2

Samara State Aerospace University, Moskovskoye Shosse 34, Samara

443086, Russia^1

Image Processing Systems Institute, RAS, Molodogvardeyskay st. 151, Samara

443001, Russia^2

关键词: Annular diaphragms;    Apodizations;    Focal spot;    Focal spot size;    Paraxial;    Phase jumps;    Spatial filterings;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/735/1/012042/pdf
DOI  :  10.1088/1742-6596/735/1/012042

来源: IOP

【 摘 要 】

The resizing of focal spot using an annular diaphragm with phase jump in the scalar paraxial case was investigated numerically. Due to the apodization optical system, we succeeded in reducing the size of the focal spot in 2.3 times.