An imaging apparatus, comprising: a light receiving device array having light receiving devices two-dimensionally arranged in both a row direction and a column direction; an area-divided polarizing filter having a diagonal stripe pattern disposed in front of the light receiving device array, wherein the area-divided polarizing filter includes two types of band-shape polarizing filter sections: vertical polarizing filter sections and horizontal polarizing filter sections which are arranged alternatively in a row direction, wherein each of the vertical polarization filter sections and each of the horizontal polarization filter sections has a width that is equal to the width of one light receiving device in the row direction and wherein the border line between the adjacent polarizing filter sections of the area-divided polarizing filter crosses two light receiving devices in the vertical direction while it crosses one light receiving device in the horizontal directions such that each of the band-shape polarizing filter sections (21, 22) has a slope equal to 2; and a signal processing unit configured to perform arithmetic processing on image data output from the light receiving devices in order to reconstruct for each group of four light receiving devices (11 to 14) arranged in two rows and two columns, the horizontally polarized light component L H and the vertically polarized light component L V of incident light, by using the following formula: L = M + I, where M + =(M T M) -1 M T, where I = [I 1 I 2 I 3 I 4] T is a matrix containing the intensity values of the four light receiving devices (11 to 14) obtained from the image data, where L = [L V, L H] T is a matrix containing the horizontally polarized light component L H and the vertically polarized light component L V of incident light where M = a v 1 a v 2 av 3 a v 4 a h 1 a h 2 a h 3 a h 4 T with a vi denoting the sensitivity of the vertically polarized light component and a hi denoting the sensitivity of the horizontally polarized light components for a light receiving device i among the four light receiving devices (11 to 14). a light receiving device array having light receiving devices two-dimensionally arranged in both a row direction and a column direction; an area-divided polarizing filter having a diagonal stripe pattern disposed in front of the light receiving device array, wherein the area-divided polarizing filter includes two types of band-shape polarizing filter sections: vertical polarizing filter sections and horizontal polarizing filter sections which are arranged alternatively in a row direction, wherein each of the vertical polarization filter sections and each of the horizontal polarization filter sections has a width that is equal to the width of one light receiving device in the row direction and wherein the border line between the adjacent polarizing filter sections of the area-divided polarizing filter crosses two light receiving devices in the vertical direction while it crosses one light receiving device in the horizontal directions such that each of the band-shape polarizing filter sections (21, 22) has a slope equal to 2; and a signal processing unit configured to perform arithmetic processing on image data output from the light receiving devices in order to reconstruct for each group of four light receiving devices (11 to 14) arranged in two rows and two columns, the horizontally polarized light component L H and the vertically polarized light component L V of incident light, by using the following formula: L = M + I, where M + =(M T M) -1 M T, where I = [I 1 I 2 I 3 I 4] T is a matrix containing the intensity values of the four light receiving devices (11 to 14) obtained from the image data, where L = [L V, L H] T is a matrix containing the horizontally polarized light component L H and the vertically polarized light component L V of incident light where M = a v 1 a v 2 av 3 a v 4 a h 1 a h 2 a h 3 a h 4 T with a vi denoting the sensitivity of the vertically polarized light component and a hi denoting the sensitivity of the horizontally polarized light components for a light receiving device i among the four light receiving devices (11 to 14).