Image forming apparatus

A method of forming an image on a plurality of light sensitive materials, comprising:

• placing a plurality of light sensitive materials side by side at positions corresponding to a plurality of conveyors arranged side by side:
• conveying the plurality of light sensitive materials in parallel to each other by the plurality of conveyors in a conveying direction to an exposing device;
• wherein the exposing device has an exposing region on which each of the plurality of light sensitive materials is exposed with light to form an image, and wherein the exposing region is arranged to be perpendicular to the conveying direction so that the exposing region crosses the plurality of light sensitive materials and is divided into plural exposing sub-regions corresponding in position to the plurality of light sensitive materials;
• memorizing plural correction data each determined based on a characteristic of each of the plurality of light sensitive materials, wherein the plurality of correction data are set separately for each of the plural exposing sub-regions in accordance with the characteristic of a corresponding one of the plurality of light sensitive materials:
• and
• correcting an amount of light at each of the plurality of exposing sub-regions based on a corresponding one of the plurality of correction data.