Image scanning device with switching mechanism for selectively scanning reflective and transparent document

An image scanning device with an optical scanning module for scanning a reflective document by incorporating with a first light source or a transparent document by incorporating with a second light source, comprising:

• a reflective optical path comprising a plurality of first group reflection mirrors arranged in the optical scanning module for reflecting a light beam projected from the first light source, and a first focusing lens having a light receiving inlet and a light projecting outlet for projecting a focused light beam of the reflective optical path;
• a transparent optical path comprising a plurality of second group reflection mirrors arranged in the optical scanning module for reflecting a light beam projected from the second light source, and a second focusing lens having a light receiving inlet and a light projecting outlet for projecting a focused light beam of the transparent optical path, the second focusing lens being arranged at an angle with respect to the first focusing lens of the reflective optical path;
• an image sensing module arranged adjacent to the light projecting outlets of the first and second focusing lens for selectively picking up the focused light beam from said first or second focusing lens;
• and
• a switching mechanism for rotating said image sensing module to align with the light projecting outlet of the first focusing lens or the light projecting outlet of the second focusing lens.