Systems and methods for providing multiple object planes in an optical image scanner

摘要

Systems and methods for providing multiple object planes in an optical image scanner are provided. One embodiment is an optical head configured to scan an object, comprising a rod-lens array positioned to focus light reflected off the document, an optical sensor array for receiving light focused through the rod-lens, and a reflective surface variably positioned relative to the rod-lens array for reflecting light from the object to the rod-lens array. Another embodiment comprises a method for providing multiple object planes in an optical image scanner comprising positioning an optical head relative to a platen to locate a primary focal point of a rod-lens array at a first object plane and adjusting the position of an optical sensor array relative to the rod-lens array to relocate the primary focal point of the rod-lens array at a second object plane.