Solid-state imaging element and dispersing element array for improved color imaging

Abstract

A solid-state image sensor includes a photosensitive cell array and a dispersing element array. Each unit blockof the photosensitive cell array includes four photosensitive cellsand. The dispersing element array makes light, obtained by subtracting a light ray with a first color component (C) from incoming light (W) and adding a light ray with a second color component (C) thereto, incident on the first photosensitive cell, also makes light, obtained by subtracting the light ray with the second color component (C) from the incoming light (W) and adding the light ray with the first color component (C) thereto, incident on the second photosensitive cell, further makes light, obtained by subtracting a light ray with a third color component (C) from the incoming light (W) and adding the light rays with the first and second color components (C=C+C) thereto, incident on the third photosensitive cell, and further makes light, obtained by subtracting the light rays with the first and second color components (C) from the incoming light (W) and adding the light ray with the third color Component (c)thereto, incident on the fourth photosensitive cell 2