摘要：In this article,we report the principle and conceptual design of a fundamentally different technology infabricating high precision aberration free optical *** tip-tilt of facet in a mirror array is produced by digitallycontrolled line-tilts of rows and *** has not only provided a cost-effective designing methodology in opticalphysics but also led to a much finer precision of 1 mili arc sec or *** examples of the application of the proposeddigitalised optics,two case studies have been given:a 10 m Schmidt telescope(off-axis)and an 8 m Cassegrain telescope(on-axis).