The color image sensor (100) generates a color image signal (144) representing a subject and includes an optical substrate and a light sensor (112). The optical substrate includes spatially-separated imaging elements. (101, 102, 103) Each of the imaging elements is configured to image light of a respective color. The light sensor includes regions (131, 132, 133) of sensor elements (e.g., 121) disposed opposite respective ones of the imaging elements. The sensor elements in each of the regions are operable to generate a component of the color image signal in response to the light of the respective color incident on them. |