A multi-wavelength laser modulation one-dimensional barcode reader and its implementation

Abstract

The invention discloses a multi-wavelength laser modulation one-dimensional barcode reader and its realization method. The barcode reader includes a laser tube, a collimating lens, a beam combining mirror, a reflecting mirror, a photoelectric receiving sensor, and an analog and digital decoding circuit. There are several laser tubes, each laser tube emits different wavelengths of laser light, each laser tube corresponds to a collimator lens, and the laser light emitted by each laser tube passes through its corresponding collimator lens and then enters a beam combiner, and then the laser beam The synthesized light beam is irradiated on the mirror; the laser is reflected by the mirror and irradiated on the one-dimensional barcode. The photoelectric receiving sensor converts the optical signal into an electrical signal after receiving the information reflected by the one-dimensional barcode, and then sends it to the analog and digital decoding circuits. The invention can eliminate the interference of external ambient light, overcome the problem in the prior art that the one-dimensional barcode printed with a color similar to the laser color cannot be read correctly, and has the advantages of wide application occasions and accurate identification.

Description

technical field [0001] The invention relates to the field of barcode reader research, in particular to a multi-wavelength laser modulated one-dimensional barcode reader and its implementation. Background technique [0002] One-dimensional laser barcode reader is used to automatically interpret one-dimensional barcodes printed on commodities or objects. At present, one-dimensional laser barcode readers have been widely used in various environments such as commodity identification, production workpiece identification and piece counting, and hospital information collection. The basic composition of one-dimensional laser barcode readers on the market is as follows: figure 1 As shown, it includes: a laser tube 11, a collimating lens 12, a reflector 6, a motion mechanism on which the reflector 6 is fixed, a photoelectric receiving sensor 8, an analog and a digital decoding circuit, wherein the laser tube 11 is driven by a laser drive circuit The moving mechanism with the reflect...

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art, and provide a multi-wavelength laser modulation one-dimensional barcode reader, which can eliminate the interference of external ambient light and avoid the use of lasers with similar colors in the prior art. The problem that the one-dimensional barcode printed in color cannot be read correctly has the advantages of wide application occasions and accurate recognition

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