Patent ID: 6036095
Filing Date: 2000-03-14
Classification: G06K

Abstract:
A symbol reading device, comprising:a casing, at least a portion of said casing being formed with an opening defining a symbol reading area;an image receiving element, said image receiving element receiving an image outputting an image signal corresponding to a received image; andan optical system, an image of a symbol to be read being formed on an image receiving surface of said image receiving element through said optical system when said symbol is located in said symbol reading area,a portion of said casing, on a surface opposite to said surface formed with said opening, being formed with a window portion through which a symbol located at said symbol reading area is observable, said optical system including an optical element provided at said window portion, said optical element extending parallel to a surface of said symbol when said symbol is located within said symbol reading area to be read, said optical element deflecting light having a wavelength within a first wavelength range, and allowing light having a wavelength at least within a second wavelength range, which is out of said first wavelength range, to pass through said optical element, said deflected light being directed to said image receiving element.