Image reading device

An image reading device that optically reads an object as an image capture target, comprising:

• a plurality of light receiving parts arrayed regularly;
• a first light blocking member including a plurality of first openings arrayed corresponding respectively to the plurality of light receiving parts;
• and
• a plurality of microlenses arrayed corresponding respectively to the plurality of first openings, wherein
• each light receiving part included in the plurality of light receiving parts includes a plurality of light receiving pixels arrayed in a first direction as a main scanning direction,
• each microlens included in the plurality of microlenses is object side telecentric, and
• the plurality of microlenses, the first light blocking member and the plurality of light receiving parts are arranged so that light reflected by the object and passing through the microlens and the first opening corresponding to the microlens enters the plurality of light receiving pixels included in the light receiving part corresponding to the first opening,
• the image reading device further comprising a first substrate on which the plurality of light receiving parts are arranged, wherein
• the plurality of light receiving parts include:
• first light receiving parts as the light receiving parts respectively arranged at positions closest to ends of the first substrate in the first direction;
• second light receiving parts as the light receiving parts other than the first light receiving parts, and
• a number of the plurality of light receiving pixels included in the first light receiving part is greater than a number of the plurality of light receiving pixels included in the second light receiving part.