| 摘要 |
A pulsed light source emits pulsed light at a pulse frequency during an object-sensing mode of a reader for electro-optically reading indicia on objects. A scanner scans the indicia with laser light for reflection therefrom during a scan mode. A light collection system detects the laser light reflected from the indicia and generates an electrical signal indicative of the indicia being read during the scan mode. A controller processes the electrical signal into data corresponding to the indicia being read during the scan mode. The same light collection system detects the pulsed light reflected from the objects and generates a trigger signal indicative of the presence of the objects during the object-sensing mode. The same controller processes the trigger signal to automatically switch from the object-sensing mode to the scan mode.
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