Patent ID: 7952683

Claim:
An exposure apparatus configured to perform an exposure of a substrate to light via an original, the apparatus comprising: a projection optical system configured to project light from the original onto the substrate; an original stage having a first reference mark and configured to hold the original and to be moved; a substrate stage configured to hold the substrate and to be moved; an optical system configured to form and pick up a first image of a mark, formed on the original held by the original stage, via the projection optical system, and to form and pick up a second image of the first reference mark via the projection optical system; and a controller configured to obtain a first coefficient of a change in a property of an image formed via the projection optical system due to a change in heat amount of the projection optical system based on the picked up first image, to obtain a second coefficient of a change in a property of an image formed via the projection optical system due to a change in heat amount of the original based on the picked up first image and the picked up second image, to obtain the change in the property with respect to each of the projection optical system and the original based on an amount of time subjected to heat load, due to the exposure, to corresponding one of the projection optical system and the original and corresponding one of the calculated first coefficient and the calculated second coefficient, and to control compensation for the change in the property obtained with respect to each of the projection optical system and the original.