Two-sided scanning device having brightness calibration components and scanning background components and office machine therewith

An office machine comprising:

• a scanning passage for allowing an object to pass therethrough;
• a feeder for driving the object to pass through the scanning passage;
• and
• a two-sided scanning device for scanning a first side and a second side of the object entering into the scanning passage, the first side being opposite to the second side, and the two-sided scanning device comprising:
• a first image scanning module for scanning the first side of the object;
• a second image scanning module disposed opposite to the first image scanning module and for scanning the second side of the object;
• a first scanning background component used as a first scanning background for the first image scanning module;
• a first brightness calibration component for calibrating a scanning brightness of the first image scanning module;
• a second scanning background component used as a second scanning background for the first image scanning module;
• and
• a second brightness calibration component for calibrating a scanning brightness of the second image scanning module;
• wherein the second image scanning module moves relative to the first image scanning module to align the second image scanning module with the second brightness calibration component or the second scanning background component selectively and further to align the first image scanning module with the first brightness calibration component or the first scanning background component selectively, and the first image scanning module and the second image scanning module are aligned with the first scanning background component and the second scanning background component respectively when the second image scanning module moves to a scanning position relative to the first image scanning module.