Patent ID: 8421835

Claim:
An exposure device including a first light source for emitting a first light beam for exposing a photosensitive member and a second light source for emitting a second light beam for exposing the photosensitive member, and configured to irradiate the photosensitive member such that an area exposed to the first light beam and an area exposed to the second light beam at least partially overlap each other, comprising: a current supply unit configured to supply the first light source with a first drive current having a predetermined value for causing the first light source to emit the first light beam, and supply the second light source with a second drive current for causing the second light source to emit the second light beam; a detection unit configured to detect an intensity of the first light beam and an intensity of the second light beam, or a sum of the intensity of the first light beam and the intensity of the second light beam; and a control unit configured to control a value of the second drive current, based on a detection result from said detection unit, such that the sum of the intensity of the first light beam and the intensity of the second light beam becomes equal to a target intensity.