About: http://webisa.webdatacommons.org/214855986

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	The shielding can be a metal or other light blocking cap disposed to shield the reference APDs 26, 36 from light.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com