About: http://webisa.webdatacommons.org/408345297

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	Additionally, the present invention may be advantageously used to produce optical elements such as lenses and diffraction gratings.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca