Patent ID: 7583283

Claim:
An exposure apparatus comprising: a plurality of light emitting elements that are arranged in a line; a substrate that the plurality of light emitting elements are arranged thereon; a plurality of temperature measuring units that are arranged along the arrangement direction of the plurality of light emitting elements and measure temperatures of the substrate on which the plurality of light emitting elements are arranged; a plurality of heating units that are arranged along the arrangement direction of the plurality of light emitting elements and heat the substrate on the basis of the temperatures measured by the temperature measuring units respectively; and a controller that controls heating values of the plurality of heating units respectively on the basis of the temperatures of the substrate measured by the plurality of temperature measuring units respectively, wherein the controller has a memory that stores a relationship between the temperatures of the substrate and a position change amount of the light emitting elements, and the controller controls the heating value of each of the plurality of heating units by use of the relationship stored in the memory.