What should I ask Bob Parks about the PSM and his career in optics?

I will be speaking with Robert Parks, the creator of the point spread microscope tool. Bob is a key figure in optics, and a well known name here in Tucson. He is an expert in metrology, assembly & testing, and overall optical sciences and engineering, which he has done in various roles over his illustrious career. What questions would you like me to ask him?