About: http://webisa.webdatacommons.org/30387777

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	If this light valve apparatus is used for a projection display system, the optical system such as the projection lens or the focus control is designed by taking the flat concave lens 32' into account.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au