A flexible configuration system, method equipment and aircraft are disclosed. The miscrolenses are formed on a surface that has been coated to have functionality that promotes a sufficiently large contact angle of the microlense on the surface and contains functionality for bonding the microlense to the coating. The minimum outer diameter OD50a is smaller than a maximum outer diameter OD21 of a track of the endless belt rotating in a predetermined direction of rotation through the rotation axis of the slip ring. Those elements are formed extending from the upper end to the lower end and slanting, at an angle of 5, downward to the optical axis Ax1 with respect to the vertical direction.