Patent ID: 8817236
Filing Date: 2014-08-26
Classification: G03F,Y10T

Abstract:
1. A movable body system, the system comprising: a movable body which substantially moves along a predetermined plane; a measurement device which has a plurality of encoder heads provided on the movable body, and which measures positional information of the movable body, based on an output of at least one of the encoder heads which faces a grating section placed parallel with the predetermined plane outside the movable body; and a drive device which drives the movable body based on the positional information measured by the measurement device, and information on a relative position between the at least one of the encoder heads used in the measurement of the positional information and the movable body, wherein the information on a relative position is information on a relative position between the at least one of the encoder heads used in the measurement of the positional information and the movable body on which the encoder heads are held.