thumb|right|Light path of a Newtonian (catoptric) telescope
thumb|right|Light path of a Newtonian (catoptric) telescope
Catoptrics (from katoptrikós ‘specular’, from kátoptron ‘mirror’) deals with the phenomena of reflected light and image-forming optical systems using mirrors. A catoptric system is also called a catopter (catoptre).
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).