The process is for use in a bar code reader. Bright field illumination is obtained by means of a special illumination of the bar code printed on a reflective surface/wafer and special reception optics. Optimum contrast between the images of the bar markings and the surrounding reflective surfaces provides enhanced recognition reliability.
申请公布号
WO9422104(A1)
申请公布日期
1994.09.29
申请号
WO1994DE00278
申请日期
1994.03.14
申请人
SIEMENS AKIENGESELLSCHAFT;FROESE-PEECK, RUEDIGER;GERHARD, DETLEF;LECHNER, JOHANN
发明人
FROESE-PEECK, RUEDIGER;GERHARD, DETLEF;LECHNER, JOHANN