An image reading apparatus in which extended image reading time is prevented
when
high quality image data is obtained, which image data is corrected by invisible
light such as infrared light which is transmitted through an original. In a CCD
scanner, visible light emitted from a light source is irradiated onto a photographic
film. Infrared light emitted from the light source is reduced by an IR light reducing
filter to be irradiated onto the photographic film. Visible light which has been
transmitted through the photographic film is irradiated on a linear CCD by a lens
unit, and the infrared light is reflected by a dichroic mirror to be irradiated
on the linear CCD. Accordingly, the reading of invisible light can be effected
at the same time that the reading of visible light is effected. It is therefore
possible to prevent image reading time from becoming long due to the time required
for the receiving of invisible light.
