IMAGE FORMING APPARATUS WITH PLURAL DOT DENSITIES

An image forming apparatus which forms an image on a recording medium at a number of different dot densities. The image forming apparatus includes a light source part for emitting a light beam, a light detection part for detecting a light beam from the light detection part detecting a light beam from the light source part and for supplying a signal indicative of a power of the detected light beam when a monitored voltage obtained by the light beam is approximately equal to a reference voltage, a memory part for storing a number of power data corresponding to the number of different dot densities, an input part for inputting a first dot density selected, a power data control part for supplying a signal indicative of a changed power data which is changed from a value of said power of the detected light beam with a power data stored in the memory means which is located by the selected first dot density, and a driving part for operating the light source with the signal from the power data control part allowing the light source to emit a light beam with the changed power, the changed power being appropriate for forming an image on the recording medium at the selected first dot density.