Patent ID: 8446502
Filing Date: 2013-05-21
Classification: G01J,G01N

Abstract:
1. A time delay integration (TDI) sensor ( 22 ) comprising a sequence of cells ( 42 , 44 , 42 , 44 ) numbered 1 to N, the TDI sensor ( 22 ) being configured for transferring a charge from the cell numbered 1 via the cells numbered 2 to N-1 to the cell numbered N, wherein each cell ( 42 ; 44 ) in the sequence of cells is either sensitive or insensitive in the sense that when the TDI sensor ( 22 ) is evenly illuminated by light ( 46 ) having a first spectrum, the intensity of the light ( 46 ) incident on any of the insensitive cells ( 44 ) is at most 90% of the intensity of the light ( 46 ) incident on any of the sensitive cells ( 42 ), and wherein the sequence of cells ( 42 , 44 , 42 , 44 ) comprises, in this order: a first sensitive cell ( 42 ), at least one insensitive cell ( 44 ), and a second sensitive cell ( 42 ).