About: http://webisa.webdatacommons.org/38797771

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	The optical path length adjustment element 712 may be an optical spacer (as shown), optical wedge, prism, lens, or other optical element.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com