About: http://webisa.webdatacommons.org/131372115

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	In order to minimize the portion, an inclined surface (surface II) of each prism other than a light emerging surface thereof is made parallel to an internal light path of each prism.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com