Abstract
We evaluated perceived depth dependence on a lighting angle and observer's position in arc 3-D display. The arc 3-D display is composed of many scratches with arc shape, for example, on an acrylic board. Lighting these scratches makes two highlight spots in one arc scratch with both eyes, resulting in one perceived highlight spot with the depth in front of or behind the board. As the result, the perceived depth is increased as the lighting angle decreases. Even when an observer effectively moves right and left from the center position of the board, the same perceived depth is successfully obtained as that of center position.
