Patent ID: 6516101
Filing Date: 2003-02-04
Classification: H04N

Abstract:
An image scanning device for realizing image data of a scanned object, comprising:a light source for providing a source light for said scanned object in order to obtain an optical image signal; a photo-detector mounted around said light source to directly receive a part of said source light, and synchronously moved together with said light source for detecting and recording light intensities of said source light at a reference position where said source light has not reached said scanned object, and a scanning position where said source light is provided for a scan line of said scanned object as a reference light intensity and a scanning light intensity, respectively; and optical signal processing means for receiving and converting said optical image signal into an electronic image signal, said optical signal processing means being a predetermined light path distant from said light source and thus said photo-detector and electrically connected to said photo-detector for reading said reference and scanning light intensities from said photo-detector, and adjusting said electronic image signal according to the variation from said reference light intensity to said scanning light intensity of said source light so as to realize said image data of said scanned object.