发明授权
US5837987A Hand-held optically readable character set reader having automatic focus control for operating over a range of distances 失效
具有自动对焦控制功能的手持光学可读字符集读取器,用于在一定范围的距离上操作

Hand-held optically readable character set reader having automatic focus
control for operating over a range of distances
摘要:
A hand-held optically readable information set reader having one or more photosensor arrays, at least one information set illuminator, and an information set image transfer system for projecting a readable image of an information set onto the one or more photosensor arrays.
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