公开(公告)号：US5747823A

公开(公告)日：1998-05-05

申请号：US694259

申请日：1996-08-08

申请人： Tomoaki Ishitsuka ,  Toshio Oshima ,  Hirofumi Noguchi ,  Mitsunari Kano

发明人： Tomoaki Ishitsuka ,  Toshio Oshima ,  Hirofumi Noguchi ,  Mitsunari Kano

IPC分类号： G06K7/10 ,  G01N21/86

CPC分类号： G06K7/10831 ,  G06K7/10594

摘要： A method of and an apparatus for detecting information from a code marking formed on a carrier by illuminating the code marking with illuminating light and detecting an emission from an illuminated position on which the illuminating light is projected. The code marking is a two-dimensional code marking bearing the information in first and second directions perpendicular to each other, and an illuminated area at the illuminated position is of a fine ribbon-like shape having a length greater than a maximum possible width of the code marking in the first direction and smaller than a minimum possible information width in the second direction. Illumination of the code marking is carried out by moving in a direction parallel to the second direction while traversing in the first direction.

摘要翻译： 一种用于通过用照明光照亮编码标记并检测来自其上投射有照明光的照明位置的发射来从形成在载体上的代码标记中检测信息的方法和装置。 代码标记是在彼此垂直的第一和第二方向上承载信息的二维代码标记，并且在照明位置处的照明区域是具有大于最大可能宽度的长度的细的带状形状 代码标记在第一方向上并且小于第二方向上的最小可能信息宽度。 通过沿与第二方向平行的方向在第一方向上移动来进行代码标记的照明。