Patent ID: 6552778
Filing Date: 2003-04-22
Classification: G02B,G03B,G06T

Abstract:
An image reading device for reading an image recorded on an original in predetermined different color wavelengths, comprising:a light source for visible light for irradiating light of visible light regions onto a surface of the original in accordance with the color wavelengths so as to read image information of the original; a light source for non-visible light for irradiating light of non-visible light regions onto a surface of the original in order to detect scratching on the original or dust on the optical path; an adjustable diffusion member that is provided on an optical path of the light source for visible light and the light source for non-visible light and which makes the amount of light irradiated onto the surface of the original substantially uniform; and an image processing section for correcting the image information based on image defect portion detection information obtained by an image reading using light from the light source for non-visible light.