Patent ID: 6789737
Filing Date: 2004-09-14
Classification: G06K

Abstract:
A light source mechanism of a barcode scanner, comprising:a laser diode that emits a point expanding light beam; a collimating lens disposed in front of said laser diode to receive and convert the point expanding light beam from said laser diode into a point parallel light beam; a standing cylindrical lens disposed in front of said collimating lens to receive and inflect the point parallel light beam from said collimating lens into a stripe light beam; a condensing lens for condensing light; a linear light receiver for receiving the light condensed by said condensing lens and converting the light into electrical signals; and a backend circuitry for decoding said the electrical signals; wherein a prism or a mirror with a proper angle is disposed on top of said laser diode and said collimating lens, the light beam from said laser diode being vertically emitted with a circuit board, passing through said collimating lens and being reflected by said prism or mirror and finally being emitted horizontally to said standing cylindrical lens, the stripe light beam being formed to reach a barcode.