Image reading device

An image reading device, comprising:

• a lens array including
• a plurality of first lens bodies arranged in a line in a main scanning direction with predetermined spacing therebetween to converge light from a reading target, and
• a plurality of second lens bodies disposed between the plurality of first lens bodies;
• a light receiver to receive light converged by each of the plurality of first lens bodies;
• and
• a plurality of light blocking plates disposed at positions between the light receiver and the plurality of second lens bodies so as to be disposed at positions corresponding to the predetermined spacing in the main scanning direction, the plurality of light blocking plates being configured to block light from the reading target propagating through the plurality of second lens bodies and each being configured to separate optical paths of light converged by ones of the plurality of first lens bodies, the ones of the plurality of first lens bodies being adjacent to each other across a corresponding second lens body of the plurality of second lens bodies, wherein
• a pitch of the plurality of light blocking plates in the main scanning direction is larger than a thickness of each of the plurality of first lens bodies in the main scanning direction, and
• each of the plurality of light blocking plates has a thickness in the main scanning direction equal to or larger than a thickness of each of the plurality of second lens bodies in the main scanning direction.