| 摘要 |
PURPOSE: A beam scanning unit is provided to reduce the noise in a printing process and improve a printing speed by using a plurality of polarization cells. CONSTITUTION: A beam scanning unit includes a micro polarization array(230), a polarization direction control unit(240), and an analyzer(250). The micro polarization array(230) is installed to receive the light from a light source. The micro polarization array(230) includes a plurality of polarization cells to the predetermined direction. The polarization direction control unit(240) controls the transmission direction of polarization components according to picture data. The analyzer(250) is used for receiving the light from the micro polarization array(230). The analyzer(250) is used for transmitting the polarization elements to the predetermined transmission direction.
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