About: http://webisa.webdatacommons.org/197232845

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	enough so that filters and other optical elements can be placed in the optical path in the space, asshown in FIG. 7.
http://www.w3.org/ns/prov#wasQuotedFrom	patentgenius.com