About: http://webisa.webdatacommons.org/324473759

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 some embodiments, optics can be used, such as lenses or mirrors, and in some embodiments, there are no intervening optical elements, although collimators may be used.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk