Patent ID: 6578765
Filing Date: 2003-06-17
Classification: G06K

Abstract:
An optics module for an optical code scanner, the scanner having a polygon scan mirror for generating a scan pattern and for directing return light reflected from an optical code toward the optics module, the optics module comprising:an optics block; a laser source mounted on the optics block for emitting a laser beam along an outgoing path; a collection lens disposed on a surface of the optics block in the outgoing path for collecting return light reflected from the polygon scan mirror; routing optics mounted on the optics block in the outgoing path between the laser source and the collection lens, the routing optics arranged for receiving the laser beam from the laser source and directing the laser beam through the collection lens toward the polygon scan mirror substantially along a pre-selected axis of the collection lens; an analog board mounted on the optics block, the analog board having a photodetector mounted thereon positioned to receive return light transmitted through the collection lens; and mounting connectors on the optics block configured to removably mount the optics module to the scanner in a fixed position such that (a) the polygon scan mirror is located and precisely aligned in the second optical path for receiving the laser beam and scanning the laser beam over a scan angle and (b) the collection lens is located and precisely aligned with respect to the polygon scan mirror for collecting return light reflected from the polygon scan mirror.