Exposing device and image forming apparatus

An exposing device comprising:

• a light emitter;
• a first light blocking member that is opposed to the light emitter, includes first apertures, and blocks a part of light emitted from the light emitter;
• a first lens array in which first lenses are disposed, wherein each of the first lenses converges the light passing through the corresponding first aperture;
• a second light blocking member that is disposed on an opposite side of the first blocking member with respect to the first lens array, includes second apertures, and blocks a part of the light coming from the first lenses;
• and
• a second lens array in which second lenses are disposed, wherein each of the second lenses converges the light passing through the corresponding second aperture, wherein
• an optical axis of each of the first lenses and an optical axis of the corresponding one of the second lenses substantially coincide with each other, and
• a first aperture center of each of the first apertures and a second aperture center of the corresponding second aperture are disposed at a predetermined distance from the optical axis of the corresponding first lens and the optical axis of the corresponding second lens in an array direction of the light emitter.