Ultrahigh-definition color video camera system with 8K X 4K pixels

We developed an experimental ultrahigh-definition color video camera [7680(H) X 4320(V) pixels] using four 8-million-pixel charge-coupled devices (CCDs) to increase the camera's resolution. This involves attaching four CCDs to a special color separation prism. Two CCDs are used for the green image; the other two are used for the red and blue images. Our prototype camera attains a limiting resolution of more than 2700 television lines, both horizontally and vertically. Camera sensitivity is F/2.8 at 2000 lux, with a luminance signal dark-noise level of approximately 50 dB in high definition television format. To analyze camera performance, we estimated the spatial position error between the two green CCDs and the chromatic aberration. Based on these estimations, the cause of resolution deterioration and ways to improve resolution are discussed. (C) 2008 SPIE and IS&T.