Patent ID: 8749758

Claim:
An exposure apparatus which projects an image of a pattern of an original onto a substrate by a projection optical system to expose the substrate to light, the apparatus comprising: an original positioning mechanism configured to position an original stage which holds the original; a substrate positioning mechanism configured to position a substrate stage which holds the substrate; a measurement device mounted on the substrate stage; and a controller, wherein one of the original and the original stage is provided with a first measurement pattern including a plurality of patterns, at least one of pitches and widths thereof being different from each other, and the measurement device including a second measurement pattern, and a sensor configured to detect light passed through the first measurement pattern, the projection optical system, and the second measurement pattern, wherein an illuminated region, within which the first measurement pattern is to be illuminated, is set so that a part of each of the plurality of patterns, which corresponds to area ratios of the plurality of patterns within the illuminated region, is illuminated, the area ratios of the plurality of patterns being determined according to information related to the original, and wherein the controller is configured to obtain information related to an image of the first measurement pattern within the illuminated region, based on an output from the sensor obtained while illuminating the part of each of the plurality of patterns within the illuminated region and moving the substrate stage.