About: http://webisa.webdatacommons.org/366635161

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 such a laser optical system, in practical use by means of a laser printer or the like, there is a tendency that lenses of short focal length are often used for miniaturization of the devices.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au