I would like to ask you to help with one Zemax file.

I use one Lightpath aspheric lens to collimate beam in 30 mm distance.

In POP there is some Newtons circles as picture of irradiance

In don’t know, why there is no standard Gaussian distribution of beam. It is looks like some interference of sources……

Is it possible, that in lens model is EVEN ASPHERE used ?

Or there is some bad settings somewhere ?

POP picture, setting and lens data of the lens are in files.

Thanks for any answer

Best Regards

Frantisek