Hello Experts,

My name is Arun, and I'm a beginner in Zemax design. I am trying to design a zoom system that can control a laser spot size from 50 microns to 500 microns, in 100-micron intervals, at a fixed working distance of 100mm. I am using a 520nm laser as a source.

I'm having difficulty controlling the spot size while also ensuring that all spot sizes are focused at the fixed working distance. Could you please explain which operands I should use and how to properly set up the system to achieve this?

Any initial design suggestions would also be greatly appreciated.

Thank you in advance for your support.