Phobos Optics LLC is owned and operated by Eric Fest, Ph.D., who has over twenty years of experience is designing, building, and testing optical systems for the aerospace and commercial optics industries. He is the author of many publications on optical engineering, including the SPIE best-selling book Stray Light Analysis and Control, and teaches the companion short course at SPIE Photonics West and Optics and Photonics conferences.