Patent ID: 8860814

Claim:
A solid-state image sensor comprising: a semiconductor layer which has a first surface and a second surface that is opposed to the first surface and that receives incoming light; a plurality of unit blocks which are arranged two-dimensionally in between the first and second surfaces of the semiconductor layer and each of which includes first and second photosensitive cells; and a reflecting portion which is arranged on the same side as the first surface of the semiconductor layer to reflect an infrared ray that has been transmitted through the first photosensitive cell in each said unit block and to make that infrared ray incident on either the first or second photosensitive cell, wherein one of the first and second photosensitive cells, which has received the infrared ray that has been reflected from the reflecting portion, outputs a photoelectrically converted signal, in which a component representing the intensity of the infrared ray that has been incident there after having been reflected by the reflecting portion has been added to the photoelectrically converted signal to be output by the other photosensitive cell, and wherein the reflecting portion includes a plurality of infrared ray reflecting mirrors, each of which is arranged to face the first photosensitive cell in an associated one of the unit blocks.