About: http://webisa.webdatacommons.org/164007587

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	FIG. 2A is a diagram that shows a relationship between normals of optical surfaces of the optical element, light rays, and propagation of the light rays;
http://www.w3.org/ns/prov#wasQuotedFrom	google.com