About: http://webisa.webdatacommons.org/82550004

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	For example, variations in materials (and therefore variations in indices of refraction) of the optical components may be used, as well as certain variations in their optical parameters such as focal length and numerical aperture.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com