FPA cold shield characteristics
Parasitic radiation in infrared focal plane arrays (FPA) with InSb photodiodes is investigated. This radiation penetrate into the detector array through chink, which is used for platinum contacts, joining leucosapphire raster and ceramic ring of FPA’s vacuum case. Shielding construction and putting cold optical filter on area of cold shield entrance window could decrease negative effect. Quantity and spread of parasitic radiation have minimal value in FPA with cylindrical cold shield.