Abstract: The invention provides for a linear reflective device having a plurality of concave reflective regions disposed along a reference line, such that normal incident light is focussed to a focal region by all of the reflective regions. The reflective device may be curved in a direction normal to the reference line or be planar. The invention further provides a method and means for manufacturing the reflective device by rolling, pressing, or molding. The invention still further provides optical, radio, or acoustical apparatus having the reflective device.