An optical scanner assembly (50) for exposing an image on a scanned surface (66). The optical scanner assembly (50) includes a laser mechanism (76) for producing a laser beam (88) representative of the image to be exposed on the scanned surface (66). The laser beam (88) defines an optical path between the laser mechanism (76) and the scanned surface (66). A laser beam shaping system (78, 80) is positioned along the optical path for focusing and shaping the laser beam (88) onto the scanned surface (66). A scanning and directing system (82) is provided for directing the laser beam (88) to the scanned surface (66) and scanning the laser beam (88) across the scanned surface (66) in an image-wise pattern. A unibody attenuation mechanism (290) is positioned along the optical path for power attenuation of the laser beam (88), wherein the unibody variable density power attenuation mechanism (290) is a linear density wedge.