发明授权
US5701001A Optical bar code reading apparatus with signal processing circuit for eliminating regular reflection condition 失效
具有消除正常反射条件的信号处理电路的光学条形码读取装置

Optical bar code reading apparatus with signal processing circuit for
eliminating regular reflection condition
摘要:
An optical reading apparatus (bar code reader) including a plurality of light emitting elements, each light emitting element emitting light in different directions onto an information recording surface which has a linear recording (bar code pattern) printed thereon. A light receiving element receives reflected light from the information recording surface and generates a recording medium read signal for each light emitting element which is transmitted to a signal processing section. The signal processing section includes a plurality of conversion processing routes for converting the recording medium read signals from the plurality of light emitting elements into a plurality of display signals. Each of the display signals is then decoded separately. When a regular reflection condition occurs in a first display signal (that is, the first display signal does not produce a valid code), but does not occur in a second display signal (that is, the second display signal produces a valid code), then the signal processing circuit only outputs the accurately decoded display signal, thereby eliminating errors caused by the occurrence of the regular reflection condition.
公开/授权文献
信息查询
0/0