Light source mechanism of barcode scanner
AssigneeRiotec Co., Ltd.
InventorKai-Yuan Tien
Life of this patent
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Abstract
A light source mechanism of a barcode scanner includes a laser diode as the point type light source, a collimating lens and a standing cylindrical lens in front of the laser diode. A mirror or a thin-film coating prism can be installed in front of the collimating lens to have the light beam from the collimating lens be reflected at least once to go out in horizontal direction. The reflected light beam from barcode passes through a condensing lens and is received by a linear receiver (CCD or CMOS sensor, for example) and is converted into electrical signals, and decoded by a circuit to get the data.
Claims16
A light source mechanism of a barcode scanner comprising:
- a laser diode as the point type light source,
- a collimating lens in front of said laser diode to convert the point type expanding light beam into a point type parallel light beam,
- a standing cylindrical lens in front of said collimating lens to inflect the point type light beam into a stripe type light beam,
- a condensing lens for condensing light,
- a linear light receiver for receiving and converting light signal into electrical signal, and
- a backend circuitry for decoding said electrical signal.
Dependencies are inferred from the claim text.