Patent ID: 6937826

Claim:
An image forming apparatus comprising: an image forming unit including an image carrier disposed to be exposed to light to have a latent image formed thereon, an electrostatic charger that charges said image carrier to a predetermined polarity, a developing device that visualizes the latent image formed on said image carrier to form a visible image, and an endless belt onto which the visible image is transferred; a plurality of image adjusting devices that adjust image forming conditions of said image forming unit, said image adjusting devices including a first image adjusting device and a second image adjusting device; a detection pattern forming device that controls said image forming unit to form predetermined detection patterns on said endless belt; a detecting device that detects the detection patterns formed on said endless belt and a quantity of reflection light from said endless belt itself; and a correction device that corrects the detection patterns detected by said detecting device based on the quantity of reflection light from said endless belt itself detected by said detecting device; wherein: said first image adjusting device adjusts one of the image forming conditions of said image forming unit based on the corrected detection result of the detection patterns; said second image adjusting device adjusts another one of the image forming conditions of said image forming unit; and said detecting device detects the quantity of reflection light from said endless belt itself in timing synchronous with the adjustment of the other one of the image forming conditions by said second image adjusting device, other than at which the one of the image forming conditions is adjusted by said first image adjusting device.