| 摘要 |
A method for operating a code reader and a code reader. According to the method, laser light is transmitted from a laser light source to illuminate an object having a code, wherein the laser light is amplitude-modulated to reduce the speckle noise of the light illuminating the object. Reflected or re-emitted light from the object is received by a light receiver. According to the code reader, the code reader includes a light transmitter having a laser light source adapted for transmitting laser light to illuminate an object having a code. The code reader also includes a light receiver arranged for receiving reflected or re-emitted light from the object and for producing electrical signals corresponding to the received light. The code reader also includes a modulation apparatus that modulates the laser light source such that amplitude-modulated light can be transmitted from the laser light source to the object.
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