Barcode image identifying and reading device

Abstract

The present invention provides a barcode image identifying and reading device. The device comprises an illumination apparatus and an integrated circuit, wherein the illumination apparatus irradiates a target region when the integrated circuit acquires reflected light; the illumination apparatus comprises a backlight lamp shade, a first light source and a second light source; the backlight lamp shade is a cover body defined by a backlight plate; a large opening and a small opening are separately formed in two ends of the cover body; the integrated circuit is arranged at the small opening of the backlight lamp shade; the backlight plate and a light axis of the integrated circuit form a certain angle; the backlight lamp shade changes a light path of the illumination apparatus and guides the light to enter a visual field range of the integrated circuit; the backlight lamp shade comprises a front surface and a back surface; an accommodating space is formed between the front surface and the back surface; the first light source is arranged in the accommodating space; the second light source is fixed on the edge, close to the large opening, of the backlight lamp shade; and the second light source is a Lambert luminous model. The backlight lamp shade is adopted to form a surface light source, so that the illumination intensity uniformity of the entire luminous surface reaches more than 90%.

Description

technical field [0001] The invention relates to the field of barcode reading, in particular to a barcode image reading device. Background technique [0002] As is well known, an optical code is information encoded in terms of color and optionally the number and relative size of a plurality of units. A bar-shaped linear optical code includes, for example, an alternating sequence of typical black bars and typical white spaces, black bars and Each of the blanks has a plurality of base widths. Two-dimensional codes consist of a grid of cells of constant shape and size, but of two or more different colors. [0003] Typically an optical code reader includes one or more light sources, illumination optics for illuminating an illumination pattern onto an optical code, and for detecting light diffused by the illuminated optical code and generating a signal derived from its magnitude and phase. A device for electrical signals representing the color and size of an optical code element...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a barcode image reading device with simple structure and good lighting effect, which solves the problem that the existing two-dimensional code image on the highly reflective surface cannot be read

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