Patent ID: 6023350
Filing Date: 2000-02-08
Classification: G03B

Abstract:
An image reading device for photographic printing of an image, comprising:an optical lens mechanism;a monochrome CCD image device, arranged at a focal position on an optical axis of the optical lens mechanism, sensing spectral characteristics of the image projected onto said monochrome CCD by said optical lens mechanism;a filter rotation plate having a plurality of color filters rotatably arranged on the optical axis;a cut filter blocking unnecessary light, arranged on the optical axis; andlight quantity correction means for obtaining stepwise spectral characteristics by balancing a light quantity of said color filters to achieve a sensitivity balance of said monochrome CCD, arranged on the optical axis,wherein exposure conditions for the photographic printing of the image are determined based on the spectral characteristics of the image sensed by said monochrome CCD after the sensitivity balance is achieved by said light quantity correction means and by said cut filter blocking the unnecessary light.