Multiple imaging areas (101a, 101b) are disposed in a one-to-one relationship with multiple optical lenses (100a, 100b) disposed in a substantially coplanar alignment. A baffle wall (110) interposed between the multiple imaging areas is provided with means for diffusively reflecting incident light rays. Low frequency components are removed from the spatial frequencies of multiple images captured in the multiple imaging areas, whereupon the multiple images are compared to determine the amount of parallax and measure the distance to the object. This allows for preventing degradation in the accuracy of distance measurement when light rays emanating from a high-intensity object located outside of the field angle are reflected from the baffle wall and impinge on the imaging area.