About: http://webisa.webdatacommons.org/268958162

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 the field of optics it is very important that optical surfaces such as on lenses and mirrors conform to a required shape.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca