About: http://webisa.webdatacommons.org/36199634

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 this embodiment, the aperture plate 50 is made of a transparent substrate, such as glass, coated on one side 52 with an opaque film such as chromium or aluminum.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com