Patent ID: 8081202

Claim:
An image forming apparatus comprising: an oscillating device configured to oscillate at a natural frequency; a laser beam device configured to emit a laser beam; a photoconductive drum, the oscillating device configured to scan the laser beam from the laser beam device across the photoconductive drum; a device-information storage unit configured to store a scanning frequency of the oscillating device; an image storage unit configured to store image data used for image formation; an image processing unit configured to perform an enlargement or reduction, in a direction orthogonal to a direction of the scanning of the laser beam and in accordance with a parameter, on the image data stored in the image storage unit; a setting unit configured to calculate the parameter from the scanning frequency stored in the device-information storage unit and a predetermined reference frequency and configured to set the parameter in the image processing unit; and a driving unit configured to drive the laser beam device according to the image data processed by the image processing unit.