A new compact optical scanner concept which is based on the optical fabrication capability of single point diamond turning is described. The unit relies on unusual reflective optical components which are impractical or impossible to manufacture by conventional means. A rotating disc which embodies a circular array of concave reflectors performs the horizontal scan in conjunction with a strip-like conical mirror located at the image plane. A unidirectional, 100% efficient scan results. The scan principle is explained and compared to polygon scanners. Mathematical relationships between the optical parameters are presented and system aberrations are briefly discussed.