Multi-wavelength laser modulation one-dimensional bar code reader and implementing mode thereof

Abstract

The invention discloses a multi-wavelength laser modulation one-dimensional bar code reader and an implementing mode of the multi-wavelength laser modulation one-dimensional bar code reader. The bar code reader comprises laser tubes, collimating lenses, a light beam combiner mirror, a reflecting mirror, a photoelectric receiving sensor and an analog-digital decoding circuit. The multiple laser tubes are arranged, wavelengths of lasers emitted by the laser tubes are different, each laser tube corresponds to one collimating lens, the lasers emitted by the laser tubes enter the light beam combiner mirror through the corresponding collimating lenses, a laser synthetic beam is irradiated on the reflecting mirror, the lasers are reflected by the reflecting mirror and then irradiated on one-dimensional bar codes, and the photoelectric receiving sensor receives information reflected by the one-dimensional bar codes, converts optical signals into electric signals, and then sends the electric signals to the analog-digital decoding circuit. The multi-wavelength laser modulation one-dimensional bar code reader can eradiate interference of light of the external environment, the defect that one-dimensional bar codes which are printed in the color similar to the color of the lasers can not be correctly read in the prior art is overcome, and the multi-wavelength laser modulation one-dimensional bar code reader has the advantages of being wide in application occasions and accurate in recognition.

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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