Original carrier and image reader

摘要

An object of this invention is to provide an original carrier and an image reader capable of performing a focusing operation every original carrier. To achieve this object, a slit hole 32 extending in a direction perpendicular to a film conveying direction is formed in a width enlarging portion of a film conveying path 34. Focusing charts 58 are formed on faces of a glass plate 38 fitted into the slit hole 32 on sides of the film conveying path 34 in both end portions of the glass plate 38 in its longitudinal direction. When light from a light source is transmitted through the focusing charts 58 of the glass plate 38 and is incident to a line CCD, focusing control is performed by a microprocessor so as to maximize the contrast of an image of each of the focusing charts 58. The focusing control can be also performed so as to maximize the contrast of an image of a photographic film 22.