Patent ID: 8013976

Claim:
An exposure apparatus comprising: a projection optical system configured to project a pattern of a reticle onto a substrate; a measurement substrate which is inserted on an image plane of said projection optical system and includes a transmission part configured to transmit a light beam having passed through said projection optical system; a light-receiving unit including a light-receiving surface configured to receive the light beam transmitted through a liquid and said transmission part; and a calculator configured to arithmetically convert a light intensity distribution, on said light-receiving surface, of the light beam received by said light-receiving surface into said light intensity distribution on a pupil plane of said projection optical system, based on information indicating a correlation between a position coordinate on said light-receiving surface and a position coordinate on the pupil of said projection optical system, wherein the calculator divides a region of the pupil plane into a plurality of elements arrayed in a grid pattern, and said calculator calculates a light intensity of one element of the plurality of elements by multiplying a light amount in at least one pixel on said light-receiving surface by a ratio of an area of the region on said light-receiving surface where light having passed through the one element reaches said pixel on said light-receiving surface and a total area of said pixel.