Abstract: A scanning device has mirrors which reflect a beam of light between them to pass successively through the lasing medium of a laser. The beam is slightly deflected on each path between the mirrors to scan a pattern and the beam is amplified with each passage through the laser. One mirror is partially reflective and partially transparent so the pattern determined by the reflective path of the light beam between the mirrors passes beyond the mirrors to be modulated for information storage, information retrieval, and other uses. One embodiment of the invention has two parallel mirrors with the beam slightly angled to be reflected back and forth along a row and wedge shaped deflectors fixed to the mirrors to shift the beam to another row so that the beam scans a pattern as it emerges from one of the partially transparent mirrors.