Phase apodization of the imaging system through separate color channels to increase the depth of field

The binary optical element for phase apodization of the pupil function of the optical system is calculated in the paper. This optical element provides an increase in the depth of field of the optical system through at least one color channel for a certain value on the optical axis. The optimization of the binary optical element was performed by simulating annealing. It is shown that the calculated optical element provides an increase in the depth of field of the optical system by about two times compared with an optical element based on a binary axicon. The calculated optical element can be used in machine vision problems for image classification.