About: http://webisa.webdatacommons.org/243454154

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	Further along the path of the beam beyond the rotating mirror is an optical means (lens or mirror) for focusing the beam and for redirecting it generally in the direction of the region where the asterisk scan pattern is to be produced.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk