Mirror Technology Days 2018 will happen November 5 to 7, 2018 at Raytheon, 2000 East El Segundo Boulevard, El Segundo, California. The workshop is managed and organized by SPIE. The Optical Society of Southern California is the local host. Presentations start on Monday November 5 and end on Wednesday November 7. Exact days and times may vary depending upon the number of presentations and potential tours of the JWST. Tech Days annually summarizes the USA Government's investment strategies and activities in developing technology for any application which requires optical components including: telescopes, imaging systems, seeker/trackers, high-energy laser systems, and solar energy. Technology investment efforts in optical materials; substrate design & manufacture; optical fabrication and metrology technology; optical coatings; wavefront sensing and control via adaptive optics; and nano-technology imaging technologies will be presented. The purpose of Tech Days is to: