Document processing apparatus with image scanning resolution correction function and method thereof

A document processing apparatus that has a function of correcting image scanning resolution, comprising,

• a light source that illuminates an original as a scanning object;
• a first reflecting member mounted with a first reflector that reflects light reflected from the original in a predetermined direction;
• a second reflecting member mounted with a second reflector that reflects the outpuuted light from the first reflector to change the light propagation direction by 180°;
• a lens that converges the outpuuted light from the second reflector;
• an optical sensor that receives an image of the original imaged by the lens and converts the image into an electric signal;
• a first reflector driving device that moves the first reflector;
• a first reflector-driving control device that controls the first reflector driving device;
• a first storage device that stores control parameters, including parameters of a default setting state, that define control operations by the first reflector-driving control device;
• a second reflector driving device that moves the second reflector in a direction substantially identical with a direction of movement of the first reflector;
• a second reflector-driving control device that associates the second reflector driving device with a position of the first reflector and controls the second reflector driving device in accordance with parameters of the default setting state and parameters associated with correction of the second reflector from a default position thereof obtained in advance;
• and
• a second storage device that stores the parameters of the default setting state that define control operations by the second reflector-driving control device and the parameters associated with correction of the second reflector from the default position obtained in advance.