Patent ID: 6762861
Filing Date: 2004-07-13
Classification: H04N

Abstract:
A scanner comprising:a housing; a transparent platform installed on the housing for placing a document; a scanning module installed inside the housing for scanning the document, the scanning module comprising: a lens moveably installed inside the scanning module for focusing light transmitted through a predetermined optical path from the document to the lens; a first mirror set fixed inside the scanning module for forming at least a part of the predetermined optical path; a third mirror set fixed inside the scanning module for optionally adjusting a length of the predetermined optical path; and a second mirror set moveably installed inside the scanning module, the second mirror set having a first position that causes the predetermined optical path to include the first, second, and third mirror sets and a second position that causes the predetermined optical path to exclude the second and third mirror sets; wherein when the second mirror set is moved from the first position to the second position or from the second position to the first position, the lens will move correspondingly to adjust the focus of the light according to the length of the predetermined optical path.