Click the image to view the example script.
The extent of the Bessel-Gauss PSF generated by a linearly-polarized annular pupil function varies with the waist of the annulus.
Special foci can be created from inhomogenously-polarized pupils. The following is a model of a tightly focused and radially polarized Laguerre-Gaussian beam.
![](https://github.com/shohamlab/foci/raw/main/examples/rplg-example-pupil.png?raw=true)
![](https://github.com/shohamlab/foci/raw/main/examples/rplg-example-psf.png?raw=true)