About: http://webisa.webdatacommons.org/118567904

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The mirror is a distance a from the entrance pupil, while the exit pupil is at a distance a f / (a - f).
http://www.w3.org/ns/prov#wasQuotedFrom	osapublishing.org