Abstract: A xerographic printer especially suitable for printing copies of oversized original documents is enabled by staggering a plurality of image bars in optical alignment with a linear projection means such as gradient index lens arrays which are tilted at a preferred angle. The image bars are selectively addressed in response to digitized bit-mapped data inputs representing the document information. The modulated light outputs from the bars are transmitted as focused lines on the surface of the photoreceptor. The printer includes illumination lamps and a lamp aperture which parallels the staggered image bars. Further, a multi-function copier/printer is realized by combining a variation of the xerographic printer with a conventional imaging system for copying a document.

Abstract: A mirror mounting structure with low thermal drift is enabled by providing a mirror mounting structure which vertically and/or horizontally aligns the mirror by providing two point forces against the mirror holding structure. The mirror holding arm is connected to a thick more rigid arm by resilient narrow slightly flexible neck portion. Screws threaded through the large arm contact alignment points on the mirror mount portion and permit accurate alignment in a desired plane. Thermal drift and hysteresis is minimized, since the alignment forces are acting upon the mirror mount portion in the same direction and minimize the deviations caused by thermal expansion.