Data symbol reader with observation window
First Claim
Patent Images
1. 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; and
an 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.
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Abstract
A symbol reading device has a casing formed with an opening which defines a symbol reading area. An image receiving element, such as a CCD, is provided within the casing. A portion of the casing, on a surface opposite to the symbol reading area, is formed with a window portion at which an optical element, which reflects light within a predetermined wavelength range, and transmits other light is provided. Accordingly, a symbol facing the opening is observable through the optical element.
99 Citations
21 Claims
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1. A symbol reading device, comprising:
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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; and an 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A symbol reading device, comprising:
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a casing, said casing having an opening defining a symbol reading area; an image receiving element, said image receiving element receiving an image of an object and outputting an image signal corresponding to the received image; and an 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 and parallel to said surface formed with the 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 deflecting light having a wavelength within a first wavelength range and directing said deflected light to said image receiving element. - View Dependent Claims (20)
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21. A symbol reading device, comprising:
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a casing, said casing having an opening defining a symbol reading area and a window portion formed on a surface opposite and parallel to said opening; an image capturing system, said image capturing system receiving light from an object and captures an image of said object; and a hologram lens provided at said window portion, a symbol located at said symbol reading area being observable through said hologram lens, said hologram lens deflecting light having a wavelength within a first wavelength range and directing said deflected light to said image capturing system.
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Specification