Avoiding End Effects in Imaging Arrays
Original Publication Date: 1989-Oct-01
Included in the Prior Art Database: 2005-Jan-29
A structure is disclosed which prevents two types of spurious output signals which originate at the edges of integrated charge-coupled optical imaging arrays such as time-delay and integration (TDI) arrays and frame transfer arrays. One type of spurious output results from the collection of excess photocharge in the first and last column of photosites due to stray light impinging on the substrate outside the region protected by an opaque stray-light shield and to dark charge originating outside the imaging array. The second type of spurious output results from the placement of the edges of the opaque light shield at the edges of the first and last imaging columns, which causes those columns to exhibit a different photosensitivity than the others in the array.