About: http://webisa.webdatacommons.org/129458149

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	Although a simple single element lens is shown, a more complex lens system to correct for astigmatic and chromatic aberration or other optical phenomena could be used.
http://www.w3.org/ns/prov#wasQuotedFrom	google.de