About: http://webisa.webdatacommons.org/37459127

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 a specific embodiment, retro-reflection or other techniques can confirm that exposure beams 27 are approximately perpendicular to the active sensing element, such as a photodiode, in corresponding detectors 402 a and 402 b.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com