Patent ID: 8514395

Claim:
An exposure apparatus which exposes an object, the apparatus comprising: a movable body which holds an object and moves along a predetermined plane; a position measurement system which obtains positional information of the movable body based on an output of a head which irradiates a measurement beam on a measurement plane placed roughly parallel to the predetermined plane external to the movable body in the vicinity of an exposure position to the object, and receives a return beam from the measurement plane, a plurality of heads being provided on the movable body and the head being one of the plurality of heads; and a control system which drives the movable body based on the positional information obtained by the position measurement system, and switches a head which the position measurement system uses to obtain the positional information out of the plurality of heads according to the position of the movable body, wherein the control system corrects a reciprocal displacement between a plurality of reference coordinate systems corresponding to the plurality of heads, within a first movement area of the movable body where the plurality of heads face the measurement plane.