| 摘要 |
A method (100) and laser scanning system (10) for reading indicia (18) comprises a laser diode (60) that projects a light beam (LB) along an optical axis of the laser scanning system toward target indicia and a photodetector (34) that receives light reflected from the target indicia during operation of the laser scanning system. The system further comprises an auto-focusing arrangement (64) having a micro-electromechanical device (68) moveably coupled to a focusing lens (66) such that activation of the micro-electromechanical device provides controlled movement of the focusing lens along the optical axis relative to the laser scanning system, altering the profile of the light beam projected from the laser diode upon the target indicia.
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