An imaging device, comprising: a light receiving device that receives light having passed through an image forming optical system and outputs a light reception signal, the light receiving device comprising: a light receiving element array formed by arraying a plurality of light receiving elements; and a micro-lens array disposed between the image forming optical system and the light receiving element array, which includes a plurality of micro-lenses arrayed in correspondence to the plurality of light receiving elements; the light receiving device comprising a storage unit that stores position-related information indicating a relative positional relationship assumed by the micro-lens array and the light receiving element array with respect to a plane perpendicular to an optical axes of each of the micro-lenses, for each one of the micro-lenses, wherein the position-related information pertains to an offset of the optical axis relative to a center of the light receiving element, and wherein the imaging device further comprises an image synthesis unit that selects specific light receiving elements from the plurality of light receiving elements based upon the position-related information, and that synthesizes image data expressing an image at a given image plane assumed by the image forming optical system based upon outputs from the selected light receiving elements. a light receiving device that receives light having passed through an image forming optical system and outputs a light reception signal, the light receiving device comprising: a light receiving element array formed by arraying a plurality of light receiving elements; and a micro-lens array disposed between the image forming optical system and the light receiving element array, which includes a plurality of micro-lenses arrayed in correspondence to the plurality of light receiving elements; the light receiving device comprising a storage unit that stores position-related information indicating a relative positional relationship assumed by the micro-lens array and the light receiving element array with respect to a plane perpendicular to an optical axes of each of the micro-lenses, for each one of the micro-lenses, wherein the position-related information pertains to an offset of the optical axis relative to a center of the light receiving element, and wherein the imaging device further comprises an image synthesis unit that selects specific light receiving elements from the plurality of light receiving elements based upon the position-related information, and that synthesizes image data expressing an image at a given image plane assumed by the image forming optical system based upon outputs from the selected light receiving elements. a light receiving element array formed by arraying a plurality of light receiving elements; and a micro-lens array disposed between the image forming optical system and the light receiving element array, which includes a plurality of micro-lenses arrayed in correspondence to the plurality of light receiving elements; the light receiving device comprising a storage unit that stores position-related information indicating a relative positional relationship assumed by the micro-lens array and the light receiving element array with respect to a plane perpendicular to an optical axes of each of the micro-lenses, for each one of the micro-lenses, wherein the position-related information pertains to an offset of the optical axis relative to a center of the light receiving element, and wherein the imaging device further comprises an image synthesis unit that selects specific light receiving elements from the plurality of light receiving elements based upon the position-related information, and that synthesizes image data expressing an image at a given image plane assumed by the image forming optical system based upon outputs from the selected light receiving elements.