Patent ID: RE41634

Claim:
A concave mirror An optical system for a scanner , comprising: a first concave mirror having a first concave surface for receiving configured to reflect a beam of incoming light received directly from a document ; a second concave mirror having a first concave surface for receiving configured to reflect the reflected light reflected from the first concave mirror; a third concave mirror having a first concave surface for receiving configured to receive the reflected light from the second concave mirror and focusing to focus the reflected light to a focal point , wherein the first concave mirror, the second concave mirror, and the third concave mirror each include short edges and long edges, wherein the short edges of the first concave mirror and the second concave mirror curve to form corresponding concave surfaces of the first concave mirror and the second concave mirror, and wherein the long edges of the third concave mirror curve to form the concave surface of the third concave mirror ; and an optical sensor whose receiving end is positioned at the focal point for receiving to receive the reflected light reflected from the third concave mirror.