Imaging optical mechanism, reading module, and image reading apparatus

An imaging optical mechanism that is mounted in an optical module that moves relative to a reading target or an imaging object and that images light that is incident in the imaging object by reflecting or transmitting the light from a light source by or through the reading target or that images light incident in the imaging object from the light source, the imaging optical mechanism comprising:

• a first specular surface that reflects the light incident from the reading target;
• a second specular surface that is disposed at a position shifted from the first specular surface in a relative movement direction of the optical module and reflects and emits light reflected by the first specular surface;
• and
• a plurality of aperture members in which slits are formed along a path in which the light incident from the reading target travels toward the first specular surface, a path in which the light reflected by the first specular surface travels toward the second specular surface, and a path in which the light reflected by the second specular surface travels toward the imaging object,
• wherein the first specular surface has
• a first curvature at which the light which is widely incident from the reading target in the movement direction is reflected so as not to be imaged at a position between the first specular surface and the second specular surface, and
• a second curvature at which the light which is widely incident from the reading target in an intersection direction intersecting the movement direction is reflected so as to be imaged at a position between the first specular surface and the second specular surface, and
• the second specular surface has
• a third curvature at which the light incident from the first specular surface in the movement direction is reflected so as to be imaged at a position of the imaging object, and
• a fourth curvature at which the light incident from the first specular surface in the intersection direction is reflected so as to be imaged at the position of the imaging object.