Image forming apparatus that forms image using multiple light emitting elements

An exposure device, comprising:

• a head unit provided with multiple light emitting elements arranged in a single line in a rotational axis of the image carrier and multiple imaging lenses that cause light from the multiple light emitting elements to form an image onto a surface of an object to be scanned, and
• a control unit configured to control a light amount of the light for forming an image at each of multiple exposure areas in accordance with light amount control data corresponding to the multiple exposure areas in response to a distance from the head unit to the multiple exposure areas of the object to be scanned opposing the head unit.

A controller, comprising:

• a holding unit configured to hold light amount control data corresponding to multiple exposure areas respectively in response to a distance from a head unit, which is provided with multiple light emitting elements arranged in a line in a rotational axis of the image carrier and multiple imaging lenses that cause light from the multiple light emitting elements to form an image onto a surface of an object to be scanned, to the multiple exposure areas of the object to be scanned opposing the head unit, and
• a control unit configured to read out from the holding unit light amount control data corresponding to the multiple exposure areas respectively to control a light amount of the light for forming an image onto the multiple exposure areas respectively.