Spatial Image Separator and System for Color Scanning With a Time Delay Integration Charge-Coupled Device
Original Publication Date: 1987-Sep-01
Included in the Prior Art Database: 2005-Feb-01
A technique is described whereby a single standard monochrome time delay integration (TDI) charge-coupled device (CCD) imager, along with a minimum amount of external optics, becomes a high resolution color scanner. (Image Omitted) Two methods of color imaging have been reported to date. The first method, which used stripe geometry color filters across the horizontal axis of the device, had a disadvantage in that there was as much as a two-thirds loss in resolution. The second method used three separate imagers to accept the three tristimulus values. Both methods had the added complexity of either extra device processing or the need for additional devices and alignment. The technique described herein utilizes only a single standard TDI monochrome imager and a modest amount of external optics.