Patent ID: 6493061
Filing Date: 2002-12-10
Classification: H04N

Abstract:
An image reading apparatus comprising:image pickup elements which read image information recorded on an original; a first light source which emits light primarily in a first range and in a second range which does not include said first range; a second light source which emits light primarily in a third range which does not include said first and second ranges, said second light source being different from said first light source; and a filter disposed within the optical path from said first or second light source to said image pickup elements, that does not transmit light in said second range but transmits light in said third range, wherein said apparatus has a first reading mode in which the light from the original emitted by said first light source is guided to said image pickup elements via said filter to obtain the image information recorded on the original, and a second reading mode in which the light from the original emitted by said second light source is guided to said image pickup elements via said filter to obtain predetermined information other than the recorded image information existing on the original.