About: http://webisa.webdatacommons.org/92778238

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	It will be apparent to those skilled in the art that the provision of the lens with a reflective pupil on the back surface is a space-saving means since the information-carrying light beam is ???folded??? at the lens.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca