An image processing apparatus performs color conversion processing on an input image. A convex reflective surface has a second center of curvature that is substantially coincident with the first center of curvature and a second vertex that lies along the optical axis. A digital template that can be used for making the digital representation on the product is also described. According to this configuration, the damage of the electric cable can be suppressed. The first and second current sources continuously adjust a common mode voltage of the loop filter nodes.