About: http://webisa.webdatacommons.org/57117701

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	As shown in FIG. 2, the diffraction grating 21 is a rectangular amplitude grating with a period L. The diffraction grating 21 has transparent and non-transparent portions alternately disposed thereon.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com