JPS6051155B

PURPOSE:To recognize accurately bar-code information on a basis of the decision result below, by deciding whethere the photo detection result is the photo detection result of the direct reflection light dependent upon a scanning window or the photodetection result of the reflection light dependent upon the bar-code label mounted on the scanning window. CONSTITUTION:Photodetecting means H1-H8 are provided at a prescribed interval on the circumference edge of scanning window 6, and three photodetecting elements are arranged in each of photodetecting means H1-H8, and the reflection light from scanning window 6 dependent upon the scanning light is received. The light from light source 1 is reflected by reflection plate 2 and is incident onto fixed reflection mirror groups F1-F4 through rotary mirror 4 rotated by motor 3, and scanning window 6 is scanned by reflection mirror groups F1-F4, and further, the bar-code stuck to good 7 mounted on scanning window 6 is scanned. Then, it is decided by the deciding means of the optical reader whether the photodetection result is the photodetection result of the direct reflection light dependent upon scanning window 6 or the photodetection result of the reflection light dependent upon the bar-code, and only the photodetection result dependent upon the bar-code is transferred to the recognizing part on a absis of the decision result of this deciding means.