Eliminate environment light flicker noise's bar code scanning apparatus and noise elimination circuit

The utility model provides an eliminate environment light flicker noise's bar code scanning apparatus and noise elimination circuit, bar code scanning apparatus include light source, first sensor, second sensor and noise elimination circuit. The light source is configured as the transmission light beam. The first sensor is configured as the first light signal that the light of bar code was left in the testing instruction reflection. The reverberation can stem from the light source and stem from near at least one the environment light source bar code scanning apparatus. The second sensor is configured as testing instruction and stems from the second light signal of the light of at least one environment light source. The noise elimination circuit is configured as from first and second light signals acquisition noise elimination scanning signal.