| 摘要 |
A bar code reader including a transmitter made up of a light source, a vibrating mirror which scans bar codes using a light beam from the light source and collects light reflected by the bar codes, a receiver made up of a light sensor which converts the reflected light that is collected into electrical signals, and a decoder which converts the coded data into data characters, wherein provision is made of a vibration angle adjuster, and the angle of vibration of the vibrating mirror is changed in order to increase or decrease the scanning region of the laser beam for the bar codes.
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