Patent ID: 6924913

Claim:
A multiple-resolution scanning device comprising: at least one light source for illuminating a document to generate an image information; a light folding device having a first reflection mirror and a second reflection mirror which faces the first reflection mirror, the light folding device introducing the image information and the image information being reflected between the first reflection mirror and the second reflection mirror; a final reflection mirror unit including at least one reflection mirror for receiving and reflecting the image information coming from the light folding device; a lens unit located in the path of light of the image information reflected from the final reflection mirror unit, for receiving the image information from the final reflection mirror unit and focusing the image information; an optical sensor for receiving the focused image information in the lens unit, and at least one driving device for driving one of the light source, the light folding device, and the final reflection mirror unit; wherein a distance between the document and the lens is designated by “p”, and a distance between the image and the lens is designated by “q”, the focus of the lens is designated by “f”, an equation for obtaining the image is expressed by 1/p+1/q=1/f, resolution of the scanning device is expressed by q/p, a value of q/p will be changed only by changing the “p” or “q”, the multiple-resolution scanning device in accordance with the present invention adjusts the resolution by changing “p” or “q” of scan lines reflected from a same position of the document, actually by changing travel distance of the scan lines reflected from the same position of the document.