Patent ID: 6715683
Filing Date: 2004-04-06
Classification: G06K

Abstract:
An optical data code reader for reading a data code from a data code label means bearing a printed data code pattern in the form of variations in density, said data code reader comprising:a scanner to be dragged across the data code label means bearing at the time of reading said data code, said scanner being composed of a light projection means including a light source and a conversion lens for projecting and converging a light beam toward said label means, and a reflected light sensor means including a capture lens and a photosensitive element for capturing reflected light rays from said data code label means and converting an amount of captured reflection light into an electric signal; said light source being a monochrome light source having a single linear spectrum or a light source of a narrow radiation spectrum range; and said capture lens being constituted by a ball lens and arranged to have a narrow transmission wavelength band permitting passage of a light flux of a source wavelength radiated from said light source while cutting out other wavelengths.